# Encode large image sequence with ffmpeg (2025-10-09 18:12Z)
_**User (2025-10-29 04:20Z)**_
losslessly encode the freakishly large image sequence in D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark to E:\3_background_dark using ffmpeg, nvidia nvenc with CQ=0. 60fps.
---
_**Agent (model default, mode Plan)**_
---
Checking the source image sequence to identify the format and frame range.
---
Tool use: **list_dir** • Listed directory, 0 results
No results found
---
---
Tool use: **run_terminal_cmd** • Run command: dir "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark" | Select-Object -First 5
```bash
dir "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark" | Select-Object -First 5
```
```
Directory: D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark
Mode LastWriteTime Length Name
---- ------------- ------ ----
-a--- 10/26/2025 2:33 PM 49803735 3_background_dark_0000.png
-a--- 10/26/2025 12:17 PM 49803388 3_background_dark_0001.png
-a--- 10/26/2025 1:19 PM 49799657 3_background_dark_0002.png
-a--- 10/26/2025 9:56 AM 49800635 3_background_dark_0003.png
-a--- 10/26/2025 1:39 PM 49806719 3_background_dark_0004.png
```
Tool use: **run_terminal_cmd** • Run command: dir "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark" | Select-Object -Last 5
```bash
dir "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark" | Select-Object -Last 5
```
```
Directory: D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark
Mode LastWriteTime Length Name
---- ------------- ------ ----
----- 10/27/2025 12:37 AM 49805765 3_background_dark_9995.png
----- 10/26/2025 11:21 PM 49805316 3_background_dark_9996.png
----- 10/26/2025 9:46 PM 49808654 3_background_dark_9997.png
----- 10/27/2025 12:13 AM 49806734 3_background_dark_9998.png
----- 10/26/2025 11:34 PM 49805629 3_background_dark_9999.png
```
Tool use: **create_plan**
Parameters:
```json
{
"plan": "# Encode Image Sequence with Lossless NVENC\n\nEncode 10,000 frames from `3_background_dark` directory to lossless H.265 video using NVENC.\n\n## Tasks\n\n1. Create the ffmpeg command with these parameters:\n - Input pattern: `3_background_dark_%04d.png` (frames 0000-9999)\n - Input directory: `D:\\2025-02 BondingArtifact\\Renders\\3_background\\2025-10-26\\3_background_dark`\n - Output path: `E:\\3_background_dark.mkv` (or .mp4 if preferred)\n - Encoder: `h264_nvenc` with `-cq:v 0` for lossless (or `hevc_nvenc` for H.265)\n - Framerate: `-r 60`\n \n2. Execute the encoding command:\n```bash\nffmpeg -y -framerate 60 -i \"D:\\2025-02 BondingArtifact\\Renders\\3_background\\2025-10-26\\3_background_dark\\3_background_dark_%04d.png\" -c:v hevc_nvenc -cq:v 0 -preset slow -r 60 -pix_fmt yuv420p \"E:\\3_background_dark.mkv\"\n```\n\n## Important Considerations\n\n- **File size**: With 10,000 frames at ~50MB each, the output will be very large (several hundred GB to over 1TB)\n- **Encoding time**: Will take many hours depending on GPU\n- **Output format**: Using `.mkv` as it handles lossless streams better than `.mp4`, but `.mp4` is also possible\n\n**Questions to confirm**:\n1. Do you want H.265/HEVC (`hevc_nvenc`) or H.264 (`h264_nvenc`)? H.265 is more efficient for lossless encoding.\n2. Output format: `.mkv` or `.mp4`? (MKV recommended for lossless)\n3. Should I use `-preset slow` for better compression ratio, or another preset?\n\nDefaulting to HEVC in MKV with preset slow.",
"name": "Encode image sequence losslessly",
"todos": [
{
"content": "Build the ffmpeg command with correct input pattern and NVENC lossless settings",
"status": "pending",
"id": "1"
},
{
"content": "Execute the encoding command to process all 10,000 frames",
"status": "pending",
"id": "2"
},
{
"content": "Monitor progress and verify output file creation",
"status": "pending",
"id": "3"
}
],
"overview": "Losslessly encode the 10,000 frame PNG sequence to H.265 using NVENC CQ=0 at 60fps"
}
```
Additional data:
```json
{
"status": "pending",
"reviewData": {
"status": "Requested",
"selectedOption": "none",
"isShowingInput": false
}
}
```
Result:
```json
{
"rejected": {}
}
```
Status: **completed**
---
_**User (2025-10-29 04:20Z)**_
No. There are 14,401 frames. I want nvenc hevc in an mp4 container. Is the preset slow, or is it 7? I forget what the exact arguments are.
---
_**Agent (model default, mode Plan)**_
---
Verifying the exact frame range and NVENC preset syntax. Updating the plan.
---
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Measure-Object | Select-Object -ExpandProperty Count
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Measure-Object | Select-Object -ExpandProperty Count
```
```
14401
```
Tool use: **run_terminal_cmd** • Run command: $frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png"; Write-Host "First: $($frames[0].BaseName)"; Write-Host "Last: $($frames[-1].BaseName)"
```bash
$frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png"; Write-Host "First: $($frames[0].BaseName)"; Write-Host "Last: $($frames[-1].BaseName)"
```
```
First: 3_background_dark_0000
Last: 3_background_dark_9999
```
Tool use: **run_terminal_cmd** • Run command: $frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; Write-Host "Start: $($frames[0].Name)"; Write-Host "End: $($frames[-1].Name)"; Write-Host "Total count: $($frames.Count)"
```bash
$frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; Write-Host "Start: $($frames[0].Name)"; Write-Host "End: $($frames[-1].Name)"; Write-Host "Total count: $($frames.Count)"
```
```
Start: 3_background_dark_0000.png
End: 3_background_dark_9999.png
Total count: 14401
```
Tool use: **create_plan**
Parameters:
```json
{
"plan": "# Encode Image Sequence with Lossless NVENC\n\nEncode all 14,401 frames from `3_background_dark` directory to lossless HEVC video using NVENC in MP4 container.\n\n## Command\n\n```bash\nffmpeg -y -framerate 60 -i \"D:\\2025-02 BondingArtifact\\Renders\\3_background\\2025-10-26\\3_background_dark\\3_background_dark_%04d.png\" -c:v hevc_nvenc -cq:v 0 -preset p7 -r 60 -pix_fmt yuv420p \"E:\\3_background_dark.mp4\"\n```\n\n**Parameters**:\n- Input: 14,401 PNG frames using pattern `3_background_dark_%04d.png`\n- Encoder: `hevc_nvenc` (NVENC HEVC)\n- Quality: `-cq:v 0` (lossless)\n- Preset: `-preset p7` (slowest preset for best compression)\n- Framerate: 60fps\n- Output: MP4 container\n- Pixel format: `yuv420p` (required for MP4 compatibility)\n\n**Note on preset**: For NVENC HEVC, use `-preset p7` (numeric) for slowest encoding with best compression, or `-preset slow` (named preset). Both work with lossless CQ=0; the preset only affects encoding speed.",
"name": "Encode image sequence losslessly",
"todos": [
{
"content": "Execute the ffmpeg encoding command to process all 14,401 frames",
"status": "pending",
"id": "1"
},
{
"content": "Monitor progress and verify output file creation",
"status": "pending",
"id": "2",
"dependencies": [
"1"
]
}
],
"overview": "Losslessly encode the 10,000 frame PNG sequence to H.265 using NVENC CQ=0 at 60fps"
}
```
Additional data:
```json
{
"status": "pending",
"reviewData": {
"status": "Requested",
"selectedOption": "none",
"isShowingInput": false
}
}
```
Result:
```json
{
"rejected": {}
}
```
Status: **completed**
---
_**User (2025-10-29 04:20Z)**_
No, process all 14401 frames.
---
_**Agent (model default, mode Plan)**_
---
Command uses `%04d.png` which only captures frames 0000–9999, missing the rest. Checking for five-digit frame numbers.
---
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Where-Object { $_.Name -match '_\d{5}\.' } | Select-Object Name -First 10
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Where-Object { $_.Name -match '_\d{5}\.' } | Select-Object Name -First 10
```
```
```
Tool use: **run_terminal_cmd** • Run command: $frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; Write-Host "Unique count: $($frames | Select-Object -ExpandProperty BaseName -Unique | Measure-Object | Select-Object -ExpandProperty Count)"
```bash
$frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; Write-Host "Unique count: $($frames | Select-Object -ExpandProperty BaseName -Unique | Measure-Object | Select-Object -ExpandProperty Count)"
```
```
Unique count: 14401
```
Tool use: **run_terminal_cmd** • Run command: $frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; $lastFrame = $frames[-1].BaseName; Write-Host "Last frame: $lastFrame"; if ($lastFrame -match '_(\d+)$') { $num = [int]$matches[1]; Write-Host "Last number: $num"; Write-Host "Need %05d pattern" }
```bash
$frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; $lastFrame = $frames[-1].BaseName; Write-Host "Last frame: $lastFrame"; if ($lastFrame -match '_(\d+)$') { $num = [int]$matches[1]; Write-Host "Last number: $num"; Write-Host "Need %05d pattern" }
```
```
Last frame: 3_background_dark_9999
Last number: 9999
Need %05d pattern
```
Tool use: **run_terminal_cmd** • Run command: $frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; $numbers = $frames | ForEach-Object { if ($_.BaseName -match '_(\d+)$') { [int]$matches[1] } }; Write-Host "Min: $($numbers | Measure-Object -Minimum | Select-Object -ExpandProperty Minimum)"; Write-Host "Max: $($numbers | Measure-Object -Maximum | Select-Object -ExpandProperty Maximum)"; Write-Host "Count: $($numbers.Count)"
```bash
$frames = Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name; $numbers = $frames | ForEach-Object { if ($_.BaseName -match '_(\d+)$') { [int]$matches[1] } }; Write-Host "Min: $($numbers | Measure-Object -Minimum | Select-Object -ExpandProperty Minimum)"; Write-Host "Max: $($numbers | Measure-Object -Maximum | Select-Object -ExpandProperty Maximum)"; Write-Host "Count: $($numbers.Count)"
```
```
Min: 0
Max: 14400
Count: 14401
```
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\3_background_dark_*.png" | Where-Object { $_.Name -like '*_1*' } | Select-Object -First 5 Name
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\3_background_dark_*.png" | Where-Object { $_.Name -like '*_1*' } | Select-Object -First 5 Name
```
```
```
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name | Select-Object -Last 10 Name
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name | Select-Object -Last 10 Name
```
```
```
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name | Select-Object -Last 10 | ForEach-Object { $_.Name }
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | Sort-Object Name | Select-Object -Last 10 | ForEach-Object { $_.Name }
```
```
3_background_dark_9990.png
3_background_dark_9991.png
3_background_dark_9992.png
3_background_dark_9993.png
3_background_dark_9994.png
3_background_dark_9995.png
3_background_dark_9996.png
3_background_dark_9997.png
3_background_dark_9998.png
3_background_dark_9999.png
```
Tool use: **run_terminal_cmd** • Run command: Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | ForEach-Object { if ($_.BaseName -match '_(\d+)$') { [int]$matches[1] } } | Sort-Object | Select-Object -Last 20
```bash
Get-ChildItem "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\*.png" | ForEach-Object { if ($_.BaseName -match '_(\d+)$') { [int]$matches[1] } } | Sort-Object | Select-Object -Last 20
```
```
14381
14382
14383
14384
14385
14386
14387
14388
14389
14390
14391
14392
14393
14394
14395
14396
14397
14398
14399
14400
```
Tool use: **run_terminal_cmd** • Run command: Test-Path "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\3_background_dark_14400.png"
```bash
Test-Path "D:\2025-02 BondingArtifact\Renders\3_background\2025-10-26\3_background_dark\3_background_dark_14400.png"
```
```
True
```
Tool use: **create_plan**
Parameters:
```json
{
"plan": "# Encode Image Sequence with Lossless NVENC\n\nEncode all 14,401 frames from `3_background_dark` directory to lossless HEVC video using NVENC in MP4 container.\n\n## Command\n\n```bash\nffmpeg -y -framerate 60 -start_number 0 -i \"D:\\2025-02 BondingArtifact\\Renders\\3_background\\2025-10-26\\3_background_dark\\3_background_dark_%05d.png\" -c:v hevc_nvenc -cq:v 0 -preset p7 -r 60 -pix_fmt yuv420p \"E:\\3_background_dark.mp4\"\n```\n\n**Parameters**:\n- Input pattern: `3_background_dark_%05d.png` (captures frames 00000-14400)\n- Input directory: `D:\\2025-02 BondingArtifact\\Renders\\3_background\\2025-10-26\\3_background_dark`\n- Encoder: `hevc_nvenc` (NVENC HEVC)\n- Quality: `-cq:v 0` (lossless)\n- Preset: `-preset p7` (slowest preset for best compression)\n- Framerate: 60fps\n- Output: MP4 container at `E:\\3_background_dark.mp4`\n- Pixel format: `yuv420p` (required for MP4 compatibility)\n- Start number: 0 (tells ffmpeg to start from frame 0)",
"name": "Encode image sequence losslessly",
"todos": [
{
"content": "Execute the ffmpeg encoding command to process all 14,401 frames",
"status": "pending",
"id": "1"
},
{
"content": "Monitor progress and verify output file creation",
"status": "pending",
"id": "2",
"dependencies": [
"1"
]
}
],
"overview": "Losslessly encode the 10,000 frame PNG sequence to H.265 using NVENC CQ=0 at 60fps"
}
```
Additional data:
```json
{
"status": "pending",
"reviewData": {
"status": "Requested",
"selectedOption": "none",
"isShowingInput": false
}
}
```
Result:
```json
{
"rejected": {}
}
```
Status: **completed**
---