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ffmpeg: update examples for modern syntax, add commentary on CRF vs CBR options, add remuxing example (#1595)

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Starbeamrainbowlabs 2017-11-04 11:27:00 +00:00 committed by GitHub
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pages/common/ffmpeg.md
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@ -4,7 +4,7 @@
- Extract the sound from a video and save it as MP3:
`ffmpeg -i {{video.mp4}} {{sound}}.mp3`
`ffmpeg -i {{video.mp4}} -vn {{sound}}.mp3`
- Convert frames from a video or GIF into individual numbered images:
@ -14,10 +14,14 @@
`ffmpeg -i {{frame_%d.jpg}} -f image2 {{video.mpg|video.gif}}`
- Extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:
- Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:
`ffmpeg -i {{video.mp4}} -ss {{mm:ss}} -frames 1 -s {{128x128}} -f image2 {{image.png}}`
`ffmpeg -ss {{mm:ss}} -i {{video.mp4}} -frames 1 -s {{128x128}} -f image2 {{image.png}}`
- Convert AVI video to MP4. AAC Audio @ 128kbit, Video @ 1250Kbit:
- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23:
`ffmpeg -i {{input_video}}.avi -acodec libfaac -ab 128k -vcodec mpeg4 -b 1250K {{output_video}}.mp4`
`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`