2/21/2023 0 Comments Ffmpeg crf scaling![]() watching on a PS3).ģ. Have your softsubbed video (.mkv) without any special characters (for avoiding error messages like “Error initializing filter ‘subtitles’ with args”) on your desktop or prefered folder (same as ffmpeg.exe and the batch file)Ĥ. Drag & Drop your softsubbed video (.mkv) onto the batch file (. With ffmpeg, it’d look like this: ffmpeg -i input.mp4 -c:v libx264 -crf 23 output.mp4 For x265, the default CRF is 28: ffmpeg -i input.mp4 -c:v libx265 -crf 28 output.mp4. The defaults here are aiming for the best compatibility (e.g. ![]() ![]() Keep in mind that everything with "Forcing for compatibility reasons" doesn't mean it has to be forced with these settings or at all for you. (Use "-c:a copy" instead of "-c:a aac_mf" and "-b:a 192k" if you don't want to convert the audio) Same works for images too: ffmpeg -i input.jpg -vf scale320:240 output320x240.png. x264-params colormatrix=bt709 => forcing the right colour matrix If you need to simply resize your video to a specific size (e.g 320×240), you can use the scale filter in its most basic form: ffmpeg -i input.avi -vf scale320:240 output.avi. bitrate and buffer size.įorcing a limit for compatibility reasons. To downscale video all you need to know is popular dimensions. maxrate 20M -bufsize 25M => limiting the max. Lower value means better video quality (less compression) but bigger file size. Better preset means better compression but slower encode time. preset veryfast => compression algorithm/speed. Forcing for compatibility reasons -vf subtitles=" % ~n1% ~x1" => subtitles. vf format=yuv420p => chroma subsampling. ![]() txt) on your desktop or prefered folder (same as ffmpeg.exe) A short explanation for the parameters: -vf scale=1280x720:flags=spline => output resolution with downscale method. Save it as a batch file (.bat instead of. Open an editor (like notepad.exe) and insert the following content: pushd %~dp0įfmpeg.exe -i "%~1" -vf scale=1280x720:flags=spline,format=yuv420p,"subtitles='%~n1'%~x1" -map_metadata -1 -movflags faststart -c:v libx264 -profile:v main -level:v 4.0 -preset veryfast -crf 16 -maxrate 20M -bufsize 25M -x264-params colormatrix=bt709 -c:a aac_mf -b:a 192k "%~n1_720p.mp4"įfmpeg.exe -i "%~1" -vf format=yuv420p,"subtitles='%~n1'%~x1" -map_metadata -1 -movflags faststart -c:v libx264 -profile:v main -level:v 4.0 -preset veryfast -crf 17 -maxrate 20M -bufsize 25M -x264-params colormatrix=bt709 -c:a aac_mf -b:a 192k "%~n1_1080p.mp4" Download the latest version of ffmpeg (Static) and copy ffmpeg.exe from the “bin” folder to your desktop or prefered folderĢ. ![]()
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