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Wiki-OcttKB/tiddlers/Normal/FFmpeg_Snippets.tid

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-created: 20221008141221923
-modified: 20230206111552123
-modifier: Octt
-tags: Snippets $:/i18n:en
-title: FFmpeg/Snippets
-
-!! Flags
-
-* Specify an input file: `-i ${File}`
-* Framerate: `-r ${r}`, `-framerate ${r}` (//use both because one sometimes doesn't work//)
-
-
-!!! Filter Flags
-
-//These are specified by prefixing an argument://
-
-* Audio: `-filter:a` or `-af`
-* Video: `-filter:v` or `-vf`
-
-!!!! Audio Filters
-
-* Volume: `volume=`
-** `±{n}dB`: Adding or Subtracting to absolute value in dB
-** `{%/100}`: Target percentage divided by 100 (e.g: //150% -> 1.5//)
-
-* Detecting volume details: `volumedetect -f null /dev/null` (just prints to console)
-
-!!!! Video Filters
-
-* Scaling: `scale=${w}:${h}`
-* [[Cropping|https://video.stackexchange.com/questions/4563/how-can-i-crop-a-video-with-ffmpeg]]: `crop=${w}:${h}:${x}:${y}`
-
-
-!!! Audio/Video Flags
-
-//These are specified as `-flag:a` or `-flag:v`.//
-
-* Bitrate: `-b:{a|v} ${n}{k|m|...}`
-* Codec: `-c:{a|v} ${codec}`
-
-!!!! Audio Flags
-
-* Audio channels: `-ac ${n}`
-
-
-!! Codecs List
-
-!!! Special
-
-* `copy`: Copy data stream without re-encoding (if supported by container)
-
-!!! Audio Codecs
-
-* `libopus`
-
-!!! Video Codecs
-
-* `h263`, `h264`, `libx265`
-* `libvpx-vp8`, `libvpx-vp9`
-* `libaom-av1`
-
-
-!! Tips
-
-* [[Trim Video|https://shotstack.io/learn/use-ffmpeg-to-trim-video]]
-* [[Image+Audio -> Video|https://superuser.com/questions/1041816/combine-one-image-one-audio-file-to-make-one-video-using-ffmpeg]]