A simple cross-platform command-line tool for comparing diffent ffmpeg video encoders based on a reference video and VMAF metric.
User can define multiple presets (= ffmpeg commands) for encoding the reference video. The tool will then calculate the VMAF metric for each defined preset.
- FFmpeg executable available in PATH or in the same directory as this tool
Usage: ./CryEncoderComparer [options] <REFERENCE CLIP> [options]
Options:
--from <timestamp> Select the FROM timestamp for reference clip. (example: 52.3)
--to <timestamp> Select the TO timestamp for reference clip. (example: 01:10)
--threads <threads> Number of threads for calculating VMAF. (default: 8)
--presets <filename> Select file that contains all presets you want to compare, separated by lines
Used reference video is myClip.mp4.
Using timestamps 00:45.5 and 01:00 and presets file presets.txt:
./CryEncoderComparer --from 00:45.5 --to 01:00 -p presets.txt myClip.mp4
Example using shorthand options. Timestamps 00:05 and 00:15. Using 16 threads for VMAF calculation:
./CryEncoderComparer -p presets.txt -f 5 -t 15 myClip.mp4 --threads 16
A presets file contains different ffmpeg commands that will encode the reference video. Each preset is in a new line.
Example:
-c:v libx265 -preset slow -b:v 2M -f mp4
-c:v libx265 -preset medium -b:v 2M -f mp4
-c:v libx265 -preset fast -b:v 2M -f mp4
-c:v hevc_nvenc -preset slow -b:v 2M -f mp4
A preset must define the following:
- video codec (options
-c:v/-codec:v/-vcodec) - output format (option
-f)
A preset must not have any inputs (-i)
Anything else is up to you. You can set encoder parameters however you want.
You can publish this tool from source code by running the following command:
dotnet publish -c Release -r win-x64 -o output
It will generate the executable for Windows insdie the output directory.
If you want to publish for other platforms, check the availabe runtime identifiers for dotnet.
(Linux: linux-x64)
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