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Update cheatsheets

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ivuorinen
2025-03-13 00:18:34 +00:00
parent ffbd8c31db
commit 904f7fe0c1
46 changed files with 228 additions and 157 deletions
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tldr/ffmpeg
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@@ -18,7 +18,7 @@ source: https://github.com/tldr-pages/tldr.git
- Save a video as GIF, scaling the height to 1000px and setting framerate to 15:
`ffmpeg -i {{path/to/video.mp4}} -vf 'scale=-1:{{1000}}' -r {{15}} {{path/to/output.gif}}`
`ffmpeg -i {{path/to/video.mp4}} {{[-vf|-filter:v]}} 'scale=-1:{{1000}}' -r {{15}} {{path/to/output.gif}}`
- Combine numbered images (`frame_1.jpg`, `frame_2.jpg`, etc) into a video or GIF:
@@ -26,16 +26,16 @@ source: https://github.com/tldr-pages/tldr.git
- 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 -i {{path/to/input_video.mp4}} -ss {{mm:ss}} -to {{mm2:ss2}} -codec copy {{path/to/output_video.mp4}}`
`ffmpeg -i {{path/to/input_video.mp4}} -ss {{mm:ss}} -to {{mm2:ss2}} {{[-c|-codec]}} copy {{path/to/output_video.mp4}}`
- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23:
`ffmpeg -i {{path/to/input_video}}.avi -codec:a aac -b:a 128k -codec:v libx264 -crf 23 {{path/to/output_video}}.mp4`
`ffmpeg -i {{path/to/input_video}}.avi {{[-c|-codec]}}:a aac -b:a 128k {{[-c|-codec]}}:v libx264 -crf 23 {{path/to/output_video}}.mp4`
- Remux MKV video to MP4 without re-encoding audio or video streams:
`ffmpeg -i {{path/to/input_video}}.mkv -codec copy {{path/to/output_video}}.mp4`
`ffmpeg -i {{path/to/input_video}}.mkv {{[-c|-codec]}} copy {{path/to/output_video}}.mp4`
- Convert MP4 video to VP9 codec. For the best quality, use a CRF value (recommended range 15-35) and -b:v MUST be 0:
`ffmpeg -i {{path/to/input_video}}.mp4 -codec:v libvpx-vp9 -crf {{30}} -b:v 0 -codec:a libopus -vbr on -threads {{number_of_threads}} {{path/to/output_video}}.webm`
`ffmpeg -i {{path/to/input_video}}.mp4 {{[-c|-codec]}}:v libvpx-vp9 -crf {{30}} -b:v 0 {{[-c|-codec]}}:a libopus -vbr on -threads {{number_of_threads}} {{path/to/output_video}}.webm`