ffmpeg

Video conversion tool.

• Extract the sound from a video and save it as MP3:

ffmpeg -i {video.mp4} -vn {sound}.mp3

• Convert frames from a video or GIF into individual numbered images:

ffmpeg -i {video.mpg|video.gif} {frame_%d.png}

• Combine numbered images (`frame_1.jpg`, `frame_2.jpg`, etc) into a video or GIF:

ffmpeg -i {frame_%d.jpg} -f image2 {video.mpg|video.gif}

• Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:

ffmpeg -ss {mm:ss} -i {video.mp4} -frames 1 -s {128x128} -f image2 {image.png}

• Trim a video from a given start time mm:ss to an end time mm2:ss2 (omit the -to flag to trim till the end):

ffmpeg -ss {mm:ss} -to {mm2:ss2} -i {video.mp4} -codec copy {output.mp4}

• Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23:

ffmpeg -i {input_video}.avi -codec:audio aac -b:audio 128k -codec:video libx264 -crf 23 {output_video}.mp4

• Remux MKV video to MP4 without re-encoding audio or video streams:

ffmpeg -i {input_video}.mkv -codec copy {output_video}.mp4

• Convert MP4 video to VP9 codec. For the best quality, use a CRF value (recommended range 15-35) and -b:video MUST be 0:

ffmpeg -i {input_video}.mp4 -codec:video libvpx-vp9 -crf {30} -b:video 0 -codec:audio libopus -vbr on -threads {number_of_threads} {output_video}.webm

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