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* pages*: improve wording and list placeholders * clamav: fix verb tenses Co-authored-by: Juri Dispan <juri.dispan@posteo.net> * buzzphrase: use k instead of n for number of phrases Co-authored-by: Juri Dispan <juri.dispan@posteo.net> * adguardhome: use non-default instead of different * adguardhome: use configuration instead of config Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com> * goimports, module: fix list placeholders Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com> * pages*: leave stems and extensions in the same placeholders * pages*: fix list placeholders * pages*: fix list placeholders * pages*: apply suggestions from code review Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com> * qpdf: enclose n with backticks Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com> --------- Co-authored-by: Juri Dispan <juri.dispan@posteo.net> Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com> Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>
36 lines
1.5 KiB
Markdown
36 lines
1.5 KiB
Markdown
# ffmpeg
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> Video conversion tool.
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> More information: <https://ffmpeg.org>.
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- Extract the sound from a video and save it as MP3:
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`ffmpeg -i {{path/to/video.mp4}} -vn {{path/to/sound.mp3}}`
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- Save a video as GIF, scaling the height to 1000px and setting framerate to 15:
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`ffmpeg -i {{path/to/video.mp4}} -vf 'scale=-1:{{1000}}' -r {{15}} {{path/to/output.gif}}`
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- Combine numbered images (`frame_1.jpg`, `frame_2.jpg`, etc) into a video or GIF:
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`ffmpeg -i {{path/to/frame_%d.jpg}} -f image2 {{video.mpg|video.gif}}`
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- Quickly extract a single frame from a video at time mm:ss and save it as a 128x128 resolution image:
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`ffmpeg -ss {{mm:ss}} -i {{path/to/video.mp4}} -frames 1 -s {{128x128}} -f image2 {{path/to/image.png}}`
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- 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):
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`ffmpeg -ss {{mm:ss}} -to {{mm2:ss2}} -i {{path/to/video.mp4}} -codec copy {{path/to/output.mp4}}`
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- Convert AVI video to MP4. AAC Audio @ 128kbit, h264 Video @ CRF 23:
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`ffmpeg -i {{path/to/input_video}}.avi -codec:a aac -b:a 128k -codec:v libx264 -crf 23 {{path/to/output_video}}.mp4`
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- Remux MKV video to MP4 without re-encoding audio or video streams:
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`ffmpeg -i {{path/to/input_video}}.mkv -codec copy {{path/to/output_video}}.mp4`
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- Convert MP4 video to VP9 codec. For the best quality, use a CRF value (recommended range 15-35) and -b:v MUST be 0:
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`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`
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