diff --git a/.specstory/history/2025-12-26_23-26Z-voukoder-transparent-video-export.md b/.specstory/history/2025-12-26_23-26Z-voukoder-transparent-video-export.md index 7eee442..9f1fbac 100644 --- a/.specstory/history/2025-12-26_23-26Z-voukoder-transparent-video-export.md +++ b/.specstory/history/2025-12-26_23-26Z-voukoder-transparent-video-export.md @@ -1404,3 +1404,1503 @@ If you need to test in VLC, you could try updating VLC, but browsers are the mos --- +_**User (2025-12-26 23:26Z)**_ + +what are the properties of rainypet.webm? + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Checking properties of `rainypet.webm`: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,codec_long_name,pix_fmt,width,height,r_frame_rate,bit_rate,color_space,color_primaries,color_trc,color_range -show_entries format=format_name,bit_rate,duration,size -of default=noprint_wrappers=1 "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\rainypet.webm" + +```bash +ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,codec_long_name,pix_fmt,width,height,r_frame_rate,bit_rate,color_space,color_primaries,color_trc,color_range -show_entries format=format_name,bit_rate,duration,size -of default=noprint_wrappers=1 "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\rainypet.webm" +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +Trying a different approach: + + +--- + + +
+Tool use: **glob_file_search** • Searched codebase "**/rainypet.webm" • **1** result in **1** directory + +Directory: **\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew** (1 file) + +| File | +|------| +| `rainypet\rainypet.webm` | + +
+ + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffprobe -v error -show_format -show_streams rainypet.webm + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffprobe -v error -show_format -show_streams rainypet.webm +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +The terminal is having issues. Run this command to get the properties: + +```bash +ffprobe -v error -select_streams v:0 -show_entries stream=codec_name,pix_fmt,width,height,r_frame_rate,bit_rate,color_space,color_primaries,color_range -show_entries format=format_name,duration,size -of default=noprint_wrappers=1 rainypet.webm +``` + +Or for a more readable output: + +```bash +ffprobe -v error -show_format -show_streams rainypet.webm +``` + +From the earlier encoding output, `rainypet.webm` should have: +- **Codec**: VP9 (libvpx-vp9) +- **Pixel Format**: yuva420p (YUV 4:2:0 with alpha channel) +- **Resolution**: 2000x2000 +- **Frame Rate**: 60 fps +- **Container**: WebM +- **Duration**: ~0.87 seconds (52 frames at 60fps) +- **File Size**: ~766 KiB (from the earlier encoding) + +The file was encoded with VP9 and supports transparency (alpha channel). If you want the exact current properties, run the ffprobe command above. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (898-1053) + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +From the properties: + +**Video Properties:** +- **Codec**: VP9 (Google VP9, Profile 0) +- **Resolution**: 2000x2000 +- **Frame Rate**: 60 fps +- **Pixel Format**: `yuv420p` (though `TAG:alpha_mode=1` indicates alpha is present) +- **Color Range**: `tv` (limited range) +- **Color Space/Primaries**: `unknown` (may affect VLC playback) +- **Duration**: 0.874 seconds (~52 frames) +- **File Size**: 1,476,289 bytes (~1.4 MB) +- **Bitrate**: ~13.5 Mbps + +**Audio Properties:** +- **Codec**: Opus +- **Sample Rate**: 48 kHz +- **Channels**: 2 (stereo) + +**Observations:** +1. Alpha is present (`TAG:alpha_mode=1`), but ffprobe shows `yuv420p` instead of `yuva420p`; the alpha is likely embedded. +2. Color space is `unknown`, which can cause VLC decoding issues. +3. Color range is `tv` (limited), while the source was full range RGB. + +The `unknown` color space may be why VLC shows artifacts. The file should work in browsers that handle VP9 alpha. If you want to improve VLC compatibility, you could re-encode with explicit color space metadata, but since browsers work, it may not be necessary. + +--- + +_**User (2025-12-26 23:26Z)**_ + +output to animated webp? + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Converting `rainypet.webm` to an animated WebP with alpha: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +``` +ffmpeg version 8.0-essentials_build-www.gyan.dev Copyright (c) 2000-2025 the FFmpeg developers + built with gcc 15.2.0 (Rev8, Built by MSYS2 project) + configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-dxva2 --enable-d3d11va --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec --enable-nvenc --enable-vaapi --enable-openal --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband + libavutil 60. 8.100 / 60. 8.100 + libavcodec 62. 11.100 / 62. 11.100 + libavformat 62. 3.100 / 62. 3.100 + libavdevice 62. 1.100 / 62. 1.100 + libavfilter 11. 4.100 / 11. 4.100 + libswscale 9. 1.100 / 9. 1.100 + libswresample 6. 1.100 / 6. 1.100 +Input #0, matroska,webm, from 'rainypet.webm': + Metadata: + TIMECODE : 00:00:00:00 + creation_time : 2025-12-26T23:46:07.401404Z + MAJOR_BRAND : qt + MINOR_VERSION : 537199360 + COMPATIBLE_BRANDS: qt + ENCODER : Lavf62.6.100 + Duration: 00:00:00.87, start: -0.007000, bitrate: 13512 kb/s + Stream #0:0(eng): Video: vp9 (Profile 0), yuv420p(tv, progressive), 2000x2000, SAR 1:1 DAR 1:1, 60 fps, 60 tbr, 1k tbn (default) + Metadata: + alpha_mode : 1 + ENCODER : Lavc62.16.100 libvpx-vp9 + HANDLER_NAME : Apple Video Media Handler + VENDOR_ID : appl + TIMECODE : 00:00:00:00 + DURATION : 00:00:00.867000000 + Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp, start -0.007000 (default) + Metadata: + ENCODER : Lavc62.16.100 libopus + HANDLER_NAME : Apple Sound Media Handler + VENDOR_ID : + TIMECODE : 00:00:00:00 + DURATION : 00:00:00.874000000 +File 'rainypet.webp' already exists. Overwrite? [y/N] Not overwriting - exiting +Error opening output file rainypet.webp. + +``` +
+ + +--- + + + +--- + + +Overwriting the existing file: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +Run this command to convert the WebM to animated WebP: + +```bash +ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**Parameters:** +- `-y` - Overwrite existing file +- `-c:v libwebp` - Use WebP encoder +- `-lossless 0` - Lossy compression (use `-lossless 1` for lossless) +- `-compression_level 6` - Compression level (0-6, higher = slower but better compression) +- `-q:v 80` - Quality (0-100, higher = better quality) +- `-loop 0` - Loop infinitely +- `-an` - Remove audio + +**For higher quality (larger file):** +```bash +ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 90 -loop 0 -preset default -an rainypet.webp +``` + +**For lossless (largest file, best quality):** +```bash +ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -an rainypet.webp +``` + +The animated WebP will preserve the alpha channel from the WebM. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (991-1053) the output has some odd behavior. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +The conversion completed, but the alpha channel may not be preserved. Converting from the original MOV to ensure alpha is handled correctly: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet_from_mov.webp + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet_from_mov.webp +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +The WebM→WebP conversion may not preserve alpha. Convert directly from the original MOV to preserve alpha: + +**Convert from original MOV (recommended):** + +```bash +ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**Or if you need to convert from WebM, extract alpha explicitly:** + +```bash +ffmpeg -y -i rainypet.webm -vf "format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**For lossless quality (larger file):** + +```bash +ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -an rainypet_lossless.webp +``` + +The issue is likely that the WebM→WebP path isn't extracting the alpha channel. Converting from the original MOV (which has proper alpha) should fix it. The `format=yuva420p` filter in the second command forces alpha extraction from the WebM. + +Try the first command (from MOV) first; it should produce a proper animated WebP with alpha. + +--- + +_**User (2025-12-26 23:26Z)**_ + +if ffmpeg can read alpha from a webm, it can output alpha to an animated webp, surely? + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +If ffmpeg can read alpha from WebM, it should output it to WebP. The output showed `yuv420p` instead of `yuva420p`, so alpha may be getting dropped. Try explicitly preserving alpha: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webm_to_webp.bat + +**Chunk 1** +Lines added: 14, lines removed: 1 + +```diff +@@ -1,1 +1,14 @@ +- ++ @echo off ++ REM Convert WebM to animated WebP with explicit alpha preservation ++ ++ echo Method 1: Explicit alpha format conversion... ++ ffmpeg -y -i rainypet.webm -vf "format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet_alpha.webp ++ ++ echo. ++ echo Method 2: Direct conversion (should preserve alpha automatically)... ++ ffmpeg -y -i rainypet.webm -c:v libwebp -pix_fmt yuva420p -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet_direct.webp ++ ++ echo. ++ echo Method 3: From original MOV (guaranteed alpha)... ++ ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet_from_mov.webp ++ +``` + +
+ + + +--- + + + +--- + + +Try these commands to preserve alpha: + +**Method 1: Explicit alpha format filter:** +```bash +ffmpeg -y -i rainypet.webm -vf "format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**Method 2: Explicit pixel format parameter:** +```bash +ffmpeg -y -i rainypet.webm -c:v libwebp -pix_fmt yuva420p -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**Method 3: Direct (should work if alpha is detected):** +```bash +ffmpeg -y -i rainypet.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +The first command uses a filter to force `yuva420p` (with alpha) before encoding. The second explicitly sets the pixel format. Since ffmpeg reads the alpha from WebM (`alpha_mode=1`), one of these should preserve it in the WebP output. + +Try Method 1 first; the `format=yuva420p` filter ensures alpha is in the pipeline before encoding. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (802-1053) they're all broken. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Noting that the last command (line 970) outputs `yuv420p` (no alpha), while the others show `yuva420p` with `alpha_mode=1`. VP9 alpha extraction may be unreliable. Converting directly from the original MOV to ensure alpha is preserved: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +VP9 alpha extraction may be unreliable. Convert directly from the original MOV file, which has proper alpha: + +```bash +ffmpeg -y -i rainypet.mov -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +The MOV has RGB alpha (`gbrap12le`), which should convert to WebP alpha more reliably than extracting from VP9. + +If you need to use the WebM, try extracting alpha explicitly first: + +```bash +ffmpeg -y -i rainypet.webm -vf "extractplanes=y+u+v+a" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +Or use a two-step process: + +```bash +ffmpeg -y -i rainypet.webm -vf "format=yuva420p" -c:v libvpx-vp9 -pix_fmt yuva420p -f webm -an temp_alpha.webm +ffmpeg -y -i temp_alpha.webm -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +Start with the first command (from MOV) for the most reliable result. + +--- + +_**User (2025-12-26 23:26Z)**_ + +this is from the MOV. @pwsh (991-1053) the output looks fine as a thumbnail but when opened in chrome 1. it's extremely slow 2. the background flashes different shades of gray 3. the frames freak out and leave after images + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +The output shows `bgra` (RGB) instead of YUV, and there's a warning about RGB-to-YUV conversion. The frame timing and disposal may also be off. Fixing the encoding: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_fixed.bat + +**Chunk 1** +Lines added: 57, lines removed: 1 + +```diff +@@ -1,1 +1,57 @@ +- ++ @echo off ++ REM Fix animated WebP encoding issues: ++ REM 1. Convert RGB to YUV properly ++ REM 2. Set proper frame timing ++ REM 3. Use better encoding settings ++ ++ echo Method 1: Convert RGB to YUV first, then encode... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 80 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -an ^ ++ rainypet_yuv.webp ++ ++ echo. ++ echo Method 2: With explicit frame rate and timing... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,fps=60" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 80 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 60 ^ ++ -an ^ ++ rainypet_fps.webp ++ ++ echo. ++ echo Method 3: Lossless (may fix frame issues)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 1 ^ ++ -compression_level 6 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -an ^ ++ rainypet_lossless.webp ++ ++ echo. ++ echo Method 4: Higher quality, slower preset... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 4 ^ ++ -q:v 90 ^ ++ -loop 0 ^ ++ -preset picture ^ ++ -an ^ ++ rainypet_hq.webp ++ +``` + +
+ + + +--- + + + +--- + + +The WebP is encoded as RGB (`bgra`) instead of YUV, which causes slow playback and artifacts. Try these: + +**Method 1: Convert RGB to YUV first (recommended):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -an rainypet.webp +``` + +**Method 2: With explicit frame rate:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,fps=60" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -r 60 -an rainypet.webp +``` + +**Method 3: Lossless (may fix frame disposal issues):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -an rainypet.webp +``` + +**Method 4: Higher quality with slower preset:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 0 -compression_level 4 -q:v 90 -loop 0 -preset picture -an rainypet.webp +``` + +The key fix is `format=gbrap,format=yuva420p` to convert RGB to YUV before encoding. This should: +- Speed up playback (YUV is more efficient) +- Fix the gray flashing (proper color space conversion) +- Fix frame artifacts (proper frame encoding) + +Try Method 1 first; it should resolve the issues. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (992-1053) method 1 same result. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Trying lossless encoding and adjusting frame disposal/timing, which may be causing the frame artifacts: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_animation_fix.bat + +**Chunk 1** +Lines added: 52, lines removed: 1 + +```diff +@@ -1,1 +1,52 @@ +- ++ @echo off ++ REM Fix animated WebP frame issues - try lossless and different settings ++ ++ echo Method 1: Lossless (best for animations, no frame artifacts)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 1 ^ ++ -compression_level 6 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -an ^ ++ rainypet_lossless.webp ++ ++ echo. ++ echo Method 2: Lossless with higher compression... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 1 ^ ++ -compression_level 4 ^ ++ -loop 0 ^ ++ -preset picture ^ ++ -an ^ ++ rainypet_lossless_hq.webp ++ ++ echo. ++ echo Method 3: Lossy but with explicit frame timing... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,setpts=PTS-STARTPTS" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 90 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 60 ^ ++ -an ^ ++ rainypet_timing.webp ++ ++ echo. ++ echo Method 4: Try from WebM instead (already YUV, might work better)... ++ ffmpeg -y -i rainypet.webm ^ ++ -vf "format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 1 ^ ++ -compression_level 6 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -an ^ ++ rainypet_from_webm.webp ++ +``` + +
+ + + +--- + + +
+ Tool use: **web_search** • Searched web `animated WebP Chrome slow playback flashing gray frames afterimages fix ffmpeg` • **1** results + +| Title | URL | Chunk | +|-------|-----|-------| +| Web Search Results | | I understand you're encountering issues when converting your MOV file with an alpha channel to an animated WebP using FFmpeg, resulting in unexpected artifacts such as afterimages and gray frames. This problem often arises due to the complexities involved in handling transparency and color spaces during the conversion process.

**Potential Causes:**

1. **Color Space Conversion Issues:** MOV files with alpha channels are typically in RGB color space, while WebP uses YUV. Improper conversion between these color spaces can lead to artifacts.

2. **Frame Disposal and Timing Settings:** Animated WebP files require precise frame disposal and timing settings. Incorrect configurations can cause frames to overlap or display incorrectly.

**Recommended Solution:**

To address these issues, consider the following approach:

1. **Use the `libwebp_anim` Encoder:**

The `libwebp_anim` encoder in FFmpeg is specifically designed for creating animated WebP files and handles alpha channels more effectively.

**Command:**

```bash
ffmpeg -i input.mov -c:v libwebp_anim -lossless 1 -loop 0 -preset default -an -vsync 0 output.webp
```

**Explanation:**

- `-c:v libwebp_anim`: Specifies the use of the `libwebp_anim` encoder.

- `-lossless 1`: Enables lossless encoding, preserving image quality.

- `-loop 0`: Sets the animation to loop indefinitely.

- `-preset default`: Uses the default encoding preset for a balance between speed and quality.

- `-an`: Disables audio processing.

- `-vsync 0`: Disables frame dropping and duplication, maintaining the original frame rate.

This method has been effective for users facing similar issues. ([stackoverflow.com](https://stackoverflow.com/questions/54097180/converting-a-mov-to-webp?utm_source=openai))

**Additional Considerations:**

- **FFmpeg Version:** Ensure you're using an up-to-date version of FFmpeg, as support for animated WebP and related features has improved over time.

- **Alternative Tools:** If issues persist, consider using dedicated tools like [Video2WebP](https://mattj.io/video2webp/), which provides a user-friendly interface for converting videos to animated WebP format.

By following this approach, you should be able to convert your MOV file with an alpha channel to an animated WebP without encountering the artifacts you've described. | + +
+ + +--- + + + +--- + + +Try these fixes for animated WebP frame issues: + +**Method 1: Lossless encoding (recommended for animations):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -vsync 0 -an rainypet.webp +``` + +**Method 2: Lossless with higher compression:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 1 -compression_level 4 -loop 0 -preset picture -vsync 0 -an rainypet.webp +``` + +**Method 3: From WebM (already YUV, might work better):** +```bash +ffmpeg -y -i rainypet.webm -vf "format=yuva420p" -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -vsync 0 -an rainypet.webp +``` + +**Method 4: Lossy with explicit frame timing:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,setpts=PTS-STARTPTS" -c:v libwebp -lossless 0 -compression_level 6 -q:v 90 -loop 0 -preset default -vsync 0 -r 60 -an rainypet.webp +``` + +Changes: +- `-lossless 1` — lossless encoding to avoid frame artifacts +- `-vsync 0` — prevents frame dropping/duplication +- `setpts=PTS-STARTPTS` — normalizes frame timing + +Try Method 1 first (lossless with `-vsync 0`). Lossless encoding often resolves frame disposal issues in animated WebP. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (990-1053) same result. I think the bitrate is massively too high + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +The bitrate is too high (~44 Mbps). Lossless WebP can be large. Trying lossy encoding with better compression settings: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_reasonable_size.bat + +**Chunk 1** +Lines added: 59, lines removed: 1 + +```diff +@@ -1,1 +1,59 @@ +- ++ @echo off ++ REM Reduce bitrate with better compression settings ++ ++ echo Method 1: Lossy with lower quality (smaller file)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 70 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_q70.webp ++ ++ echo. ++ echo Method 2: Lower quality, higher compression... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 60 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_q60.webp ++ ++ echo. ++ echo Method 3: Maximum compression... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 50 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_q50.webp ++ ++ echo. ++ echo Method 4: Reduce frame rate to 30fps (half the frames)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,fps=30" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 80 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 30 ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_30fps.webp ++ +``` + +
+ + + +--- + + + +--- + + +Try these lossy settings to reduce bitrate: + +**Method 1: Lower quality (q:v 70):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 70 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 2: Even lower quality (q:v 60):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 60 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 3: Reduce to 30fps (half the frames = much smaller):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 80 -loop 0 -preset default -r 30 -fps_mode passthrough -an rainypet.webp +``` + +**Method 4: Balanced (q:v 75):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +Changes: +- `-lossless 0` — lossy encoding (much smaller files) +- `-q:v 60-75` — quality (lower = smaller file, 50-80 is typical) +- `-fps_mode passthrough` — modern replacement for `-vsync 0` +- Method 3 reduces frame rate to 30fps to cut file size + +Start with Method 1 (q:v 70). If it’s still too large, try Method 2 (q:v 60) or Method 3 (30fps). This should reduce the bitrate and improve playback performance. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (928-1053) same result. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Bitrate is still high (~43 Mbps). At 2000x2000 and 60fps, each frame is large. Reducing resolution and frame rate: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_reduce_size.bat + +**Chunk 1** +Lines added: 61, lines removed: 1 + +```diff +@@ -1,1 +1,61 @@ +- ++ @echo off ++ REM Reduce resolution and/or frame rate to fix playback issues ++ ++ echo Method 1: Reduce to 30fps (half the frames)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,fps=30" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 75 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 30 ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_30fps.webp ++ ++ echo. ++ echo Method 2: Reduce resolution to 1000x1000 (quarter the pixels)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=1000:1000" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 75 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_1000.webp ++ ++ echo. ++ echo Method 3: Both - 30fps and 1000x1000... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=1000:1000,fps=30" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 75 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 30 ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_1000_30fps.webp ++ ++ echo. ++ echo Method 4: Lower quality, 30fps... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,fps=30" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 60 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -r 30 ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_30fps_q60.webp ++ +``` + +
+ + + +--- + + + +--- + + +The bitrate is too high for smooth playback. At 2000x2000 and 60fps, each frame is large. Try reducing resolution and/or frame rate: + +**Method 1: Reduce to 30fps (half the frames):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -r 30 -fps_mode passthrough -an rainypet.webp +``` + +**Method 2: Reduce resolution to 1000x1000 (quarter the pixels):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=1000:1000" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 3: Both - 30fps and 1000x1000 (recommended):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=1000:1000,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -r 30 -fps_mode passthrough -an rainypet.webp +``` + +**Method 4: Even smaller - 800x800 at 30fps:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=800:800,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -r 30 -fps_mode passthrough -an rainypet.webp +``` + +At 2000x2000 and 60fps, the bitrate is too high for smooth playback. Method 3 (1000x1000 at 30fps) should reduce the bitrate significantly and improve playback. Try Method 3 first. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (1006-1053) + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Removing the conflicting `-r` parameter when using `-fps_mode passthrough`: + + +--- + + + +
Tool use: **search_replace** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_reduce_size.bat + +**Chunk 1** +Lines added: undefined, lines removed: 1 + +```diff +@@ -11,5 +11,4 @@ + -loop 0 ^ + -preset default ^ +- -r 30 ^ + -fps_mode passthrough ^ + -an ^ +``` + +**Chunk 2** +Lines added: undefined, lines removed: 1 + +```diff +@@ -40,5 +39,4 @@ + -loop 0 ^ + -preset default ^ +- -r 30 ^ + -fps_mode passthrough ^ + -an ^ +``` + +**Chunk 3** +Lines added: undefined, lines removed: 1 + +```diff +@@ -55,5 +53,4 @@ + -loop 0 ^ + -preset default ^ +- -r 30 ^ + -fps_mode passthrough ^ + -an ^ +``` + +
+ + + +--- + + + +--- + + +Removed the conflicting `-r` parameter. Use these corrected commands: + +**Method 1: Reduce to 30fps:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 2: Reduce resolution to 1000x1000:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=1000:1000" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 3: Both - 30fps and 1000x1000 (recommended):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=1000:1000,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +The `fps=30` filter handles the frame rate conversion, so `-r` isn't needed. Try Method 3 first; it should reduce the bitrate and improve playback. + +--- + +_**User (2025-12-26 23:26Z)**_ + +let's set it to 250x250 + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Encoding at 250x250: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +Run this command to encode at 250x250: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Or with 30fps for even smaller file:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,fps=30" -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +At 250x250, the bitrate should be much lower and playback should be smooth. The second command also reduces to 30fps for a smaller file. + +--- + +_**User (2025-12-26 23:26Z)**_ + +the playback issue is fixed. the frames are still leaving afterimages; it's just slapping one frame directly on top of the next, without regard for how the transparency will allow the previous frame to be seen. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Frames are compositing without proper disposal. Animated WebP may not handle transparent frame disposal well. Trying lossless encoding and checking for disposal-related encoder options: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\webp_frame_disposal.bat + +**Chunk 1** +Lines added: 50, lines removed: 1 + +```diff +@@ -1,1 +1,50 @@ +- ++ @echo off ++ REM Try to fix frame disposal issues in animated WebP ++ ++ echo Method 1: Lossless (sometimes handles frame disposal better)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=250:250" ^ ++ -c:v libwebp ^ ++ -lossless 1 ^ ++ -compression_level 6 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_lossless.webp ++ ++ echo. ++ echo Method 2: Try with picture preset (might handle frames differently)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=250:250" ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 75 ^ ++ -loop 0 ^ ++ -preset picture ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_picture.webp ++ ++ echo. ++ echo Method 3: Convert to GIF first, then to WebP (GIF has better disposal)... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=250:250" ^ ++ -c:v gif ^ ++ -an ^ ++ rainypet_temp.gif ++ ++ ffmpeg -y -i rainypet_temp.gif ^ ++ -c:v libwebp ^ ++ -lossless 0 ^ ++ -compression_level 6 ^ ++ -q:v 75 ^ ++ -loop 0 ^ ++ -preset default ^ ++ -fps_mode passthrough ^ ++ -an ^ ++ rainypet_from_gif.webp ++ ++ del rainypet_temp.gif ++ +``` + +
+ + + +--- + + +
+ Tool use: **web_search** • Searched web `animated WebP frame disposal transparency afterimages ffmpeg libwebp fix` • **1** results + +| Title | URL | Chunk | +|-------|-----|-------| +| Web Search Results | | The issue you're encountering, where previous frames are visible through transparent areas in your animated WebP, is likely due to the frame blending and disposal settings during encoding. In the WebP format, each frame can specify how it blends with the previous frame and how it disposes of itself before the next frame is rendered. If these settings aren't configured correctly, it can result in artifacts where remnants of previous frames are visible.

To address this, you can adjust the blending and disposal methods during the encoding process. FFmpeg's native WebP muxer has had issues with frame blending settings in the past, leading to such artifacts. A patch was proposed to set the blending method to "do not blend" and the disposal method to "do not dispose" to prevent these issues. ([ffmpeg.org](https://ffmpeg.org/pipermail/ffmpeg-devel/2015-June/174631.html?utm_source=openai))

To implement this in your FFmpeg command, you can use the `-disposition` option to set the frame disposal method and the `-blend` option to set the blending method. Here's how you can modify your command:

```bash
ffmpeg -i input.mov -vf "format=yuva420p" -c:v libwebp -disposition:v:0 0 -blend 0 -loop 0 -an output.webp
```

In this command:

- `-disposition:v:0 0` sets the disposal method to "do not dispose."
- `-blend 0` sets the blending method to "do not blend."
- `-loop 0` ensures the animation loops indefinitely.

By explicitly setting these parameters, you can control how each frame interacts with the previous one, preventing the issue of previous frames showing through transparent areas.

If the problem persists, consider updating your FFmpeg to the latest version, as improvements and bug fixes related to WebP encoding have been made over time. Additionally, ensure that your source video has a proper alpha channel and that it's being preserved throughout the encoding process. | + +
+ + +--- + + + +--- + + +Trying explicit frame disposal settings. WebP animations may not handle transparent frame disposal well. Try these: + +**Method 1: Lossless (may handle disposal better):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v libwebp -lossless 1 -compression_level 6 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +``` + +**Method 2: Try converting via GIF first (GIF has better frame disposal):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v gif -an rainypet_temp.gif +ffmpeg -y -i rainypet_temp.gif -c:v libwebp -lossless 0 -compression_level 6 -q:v 75 -loop 0 -preset default -fps_mode passthrough -an rainypet.webp +del rainypet_temp.gif +``` + +**Method 3: Try using APNG instead (better transparency support):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -plays 0 -f apng rainypet.png +``` + +**Method 4: Use WebM instead (better for transparent animations):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v libvpx-vp9 -pix_fmt yuva420p -auto-alt-ref 0 -lag-in-frames 0 -crf 30 -b:v 0 -an rainypet.webm +``` + +Animated WebP has limited frame disposal support for transparency. Method 2 (via GIF) may work better, or consider WebM (Method 4) or APNG (Method 3) for transparent animations. Try Method 1 first; if it still shows afterimages, try Method 2 or 4. + +--- + +_**User (2025-12-26 23:26Z)**_ + +just go mov to gif. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +Converting MOV to GIF with transparency: + + +--- + + +
Tool use: **run_terminal_cmd** • Run command: cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v gif -an rainypet.gif + +```bash +cd "\\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet" && ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v gif -an rainypet.gif +``` + +``` +spawn C:\Program Files\PowerShell\7\pwsh.exe ENOENT +``` +
+ + +--- + + + +--- + + +Run this command to convert MOV to GIF: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250" -c:v gif -an rainypet.gif +``` + +**Or if you want to keep the original resolution:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p" -c:v gif -an rainypet.gif +``` + +**Or with 30fps:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,fps=30" -c:v gif -an rainypet.gif +``` + +GIF handles frame disposal for transparency better than animated WebP, so it should fix the afterimage issue. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (992-1053) it's not transparent, and similar artifacting is following the gif output. + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +GIF output shows `bgr8` (no alpha). GIF requires a palette with transparency. Using a palette filter to preserve transparency: + + +--- + + + +
Tool use: **write** • Edit file: \\hydra\Hydra\Creative\artsy\shoppers\2020\2020-08-13 rainynew\rainypet\gif_transparent.bat + +**Chunk 1** +Lines added: 24, lines removed: 1 + +```diff +@@ -1,1 +1,24 @@ +- ++ @echo off ++ REM Create GIF with proper transparency using palette filter ++ ++ echo Method 1: Generate palette with transparency, then encode... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=250:250,palettegen=reserve_transparent=1" ^ ++ -frames:v 1 ^ ++ rainypet_palette.png ++ ++ ffmpeg -y -i rainypet.mov ^ ++ -i rainypet_palette.png ^ ++ -lavfi "format=gbrap,format=yuva420p,scale=250:250[x];[x][1:v]paletteuse=alpha_threshold=128" ^ ++ -an ^ ++ rainypet.gif ++ ++ del rainypet_palette.png ++ ++ echo. ++ echo Method 2: Single command with complex filter... ++ ffmpeg -y -i rainypet.mov ^ ++ -vf "format=gbrap,format=yuva420p,scale=250:250,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" ^ ++ -an ^ ++ rainypet_single.gif ++ +``` + +
+ + + +--- + + + +--- + + +GIF requires a palette with transparency. Use one of these: + +**Method 1: Two-step (generates palette, then encodes):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,palettegen=reserve_transparent=1" -frames:v 1 rainypet_palette.png + +ffmpeg -y -i rainypet.mov -i rainypet_palette.png -lavfi "format=gbrap,format=yuva420p,scale=250:250[x];[x][1:v]paletteuse=alpha_threshold=128" -an rainypet.gif + +del rainypet_palette.png +``` + +**Method 2: Single command (recommended):** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -an rainypet.gif +``` + +**Method 3: With dithering for better quality:** +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,split[s0][s1];[s0]palettegen=reserve_transparent=1:max_colors=256[p];[s1][p]paletteuse=alpha_threshold=128:dither=bayer" -an rainypet.gif +``` + +The key parts: +- `palettegen=reserve_transparent=1` - Creates a palette that reserves a slot for transparency +- `paletteuse=alpha_threshold=128` - Uses the palette and converts alpha to GIF transparency +- `split[s0][s1]` - Splits the video so one stream generates the palette and the other uses it + +Try Method 2 first; it should produce a transparent GIF with proper frame disposal. + +--- + +_**User (2025-12-26 23:26Z)**_ + +why was the output slowed? @pwsh (908-1053) + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +The palette-based encoding is slower because it: +1. Generates a palette from all frames +2. Applies the palette to each frame + +The output shows `pal8` (palette-based), which is correct for transparent GIFs, but the extra processing adds time. + +If playback seems slow, the frame timing may be off. Try explicitly setting the frame rate: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -r 60 -an rainypet.gif +``` + +Or reduce to 30fps if 60fps is too much: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,fps=30,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -r 30 -an rainypet.gif +``` + +The encoding slowdown is expected due to palette generation. If playback is slow, add `-r 60` (or `-r 30`) to set the output frame rate. + +--- + +_**User (2025-12-26 23:26Z)**_ + +@pwsh (987-1053) it's still slow + +--- + +_**Agent (model default, mode Agent)**_ + + + +--- + + +GIF frame timing may be off. Try normalizing timing and reducing the frame rate: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,fps=30,setpts=PTS-STARTPTS,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -r 30 -an rainypet.gif +``` + +Or try 15fps for smoother playback: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,fps=15,setpts=PTS-STARTPTS,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -r 15 -an rainypet.gif +``` + +Or keep 60fps but normalize timing: + +```bash +ffmpeg -y -i rainypet.mov -vf "format=gbrap,format=yuva420p,scale=250:250,setpts=PTS-STARTPTS,split[s0][s1];[s0]palettegen=reserve_transparent=1[p];[s1][p]paletteuse=alpha_threshold=128" -r 60 -an rainypet.gif +``` + +The `setpts=PTS-STARTPTS` normalizes frame timing, and reducing to 30fps or 15fps can help with GIF playback. Try the 30fps version first. + +--- + diff --git a/rainypet/rainypet.gif b/rainypet/rainypet.gif new file mode 100644 index 0000000..bfe08c6 --- /dev/null +++ b/rainypet/rainypet.gif @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:d4b0713b6e305d67e51f501bc9310af846b407280f7ca6c293392a3629994612 +size 535877 diff --git a/rainypet/rainypet.mov b/rainypet/rainypet.mov new file mode 100644 index 0000000..deb6903 --- /dev/null +++ b/rainypet/rainypet.mov @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:1e308029f2263e8eb503717574d791286e41fd6d4673bdff63950345ddae5627 +size 64368468 diff --git a/rainypet/rainypet.webp b/rainypet/rainypet.webp index 4d46974..022e15d 100644 --- a/rainypet/rainypet.webp +++ b/rainypet/rainypet.webp @@ -1,3 +1,3 @@ version https://git-lfs.github.com/spec/v1 -oid sha256:06527435cc983b6b3192923cfe7cc82cff08adb21847ab8e159f4111d8f39ec7 -size 5156628 +oid sha256:af56bb37ded3937e89eefea295d9a76ea8d2a8c4a08b123df847759c6ebc3fd4 +size 648924