Schnee (schnee) wrote,

Recoding videos with ffmpeg

It's easy. To only recode the video stream (using HEVC/H.265/libx265 in this case), do this:

$ ffmpeg -i infile.mp4 -c:v hevc -c:a copy outfile.mp4

To also encode audio (using AAC), do this:

$ ffmpeg -i infile.mp4 -c:v hevc -c:a aac -b:a 192k outfile.mp4

In either case, “-c” stands for “codec”, while “-b” stands for “bitrate”. To find out what codecs a file currently uses and what the bitrates are, use

$ ffmpeg -i infile.mp4

I don't usually recommend reencoding audio; you'll get a noticeable quality loss without saving much in terms of file size. Video, on the other hand …

Tags: ffmpeg, useful stuff, videos

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