mp3 specifying a high bitrate (-b) audio for best quality sound.įfmpeg -i ~/input.webm -b:a 192k ~/output.mp3Ĭonvert a. High-quality encoding using -crf (Constant Rate Factor) and -preset:įfmpeg -i input.mp4 -preset slower -crf 18 output.mp4Ĭonvert a. Specify the codecs for both video (-c:v) and audio (-c:a)įfmpeg -i input.mp4 -c:v vp9 -c:a mp3 output.mkvĮncode the audio as mp3 and copy the video stream unchanged: ffmpeg -i input.mp4 -c:v copy -c:a mp3 output.mkv
mkv (another container format):įfmpeg -i input.webm -c:av copy output.mkv ':av' is the default so this could also be specified with just -c copy:įfmpeg -i input.mkv -c:av copy output.mp4
Remux from MKV (a container format) into MP4 (another container format), lossless copy without re-encoding. pix_fmt yuv420p -profile:v baseline -level 3.A cross-platform solution to record, convert and stream audio and video. pix_fmt yuv420p -profile:v baseline -level 3.0 -movflags +faststart \ vp9 / vp8 output seems to output same visual quality with half the file size compared to x264.given the same compression settings, vp9 seems to have a better visual quality compared to vp8.preset medium, unrestricted threads, same speedĪnd here is my result and my opinion Codec.So I have decided to make a few things constant. Then I realise, these command snippets vary in output options, in terms of their encoding speed, output resolution, frame rate, bitrate and quality. shared the same sentiment when I started pasting these command snippets into my terminal. VP9 (google recomended) takes around hour and file is 13.9MiBĬan't see any benefits of VP9 or it's animated video same special case? MP4 takes few seconds and resulting file is 14.2MiB
Since all browsers support MP4, we can use WebM's VP9 codec for modern browsers and fall back to MP4s for the rest.įunny results I have to say. Supported only on macOS High Sierra and onwards.Supported only for devices with hardware support.g 9999 -aq-mode 0 -c:a libopus -b:a 64k -f webm out.webm SupportĪs of January 2015, all major browsers support MP4. tile-columns 0 -frame-parallel 0 -auto-alt-ref 1 -lag-in-frames 25 \įfmpeg -i -c:v libvpx-vp9 -pass 2 -b:v 1000K -threads 1 -speed 0 \ Ffmpeg -i -c:v libvpx-vp9 -pass 1 -b:v 1000K -threads 1 -speed 4 \
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