1.7 KiB
1.7 KiB
Ffmpeg. NOTE: Add info about av1/opus when I become sane again.
Encoders:
- h264: SW -
libx264
, HW -h264_vaapi
. - h265: SW -
libx265
, HW -hevc_vaapi
.
VHS to h264.
ffmpeg -i 'concat:VTS_01_1.VOB|VTS_01_2.VOB|VTS_01_3.VOB|VTS_01_4.VOB|VTS_01_5.VOB' -c:v libx264 -c:a aac -standard NTSC -preset veryslow -vf yadif ./out.mkv
Add audio.
ffmpeg -i video.mkv -i audio.mp3 -map 0 -map 1:a -c:v copy -shortest output.mkv
Replace audio.
ffmpeg -i Episode\ S01E03.mkv -i RUS\ Sound/Episode\ S01E03.mka -c copy -map 0:v:0 -map 1:a:0 -shortest with_audio/Episode\ S01E03.mkv
Add thumbnail to mkv.
ffmpeg -i video.mkv -attach cover.jpg -metadata:s:t:0 mimetype=image/jpeg -c copy out.mkv
Hardware vaapi.
Encode only:
ffmpeg -vaapi_device /dev/dri/renderD128 -i video.mkv -vf 'format=nv12,hwupload' -c:v hevc_vaapi out.mkv
Decode + encode:
ffmpeg -hwaccel vaapi -hwaccel_device /dev/dri/renderD128 -hwaccel_output_format vaapi -i video.mkv -c:v hevc_vaapi out.mkv
Add image to music (Album cover).
ffmpeg -i audio.flac -i image.png -map 0:a -map 1 -codec copy -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (front)" -disposition:v attached_pic output.flac
Scale down video.
ffmpeg -i input4kvid.mp4 -vf scale=1920:1080 output1080vid.mp4
This one may require using -2 or -4 in some cases.
ffmpeg -i input.avi -vf scale=720:-1 -c:a copy output.mkv // -1 for auto height.
For vaapi use scale_vaapi=-1:720
.
Limit to specific CPUs.
taskset -c 0 ffmpeg...
taskset -c 0,2 ffmpeg...
Edit metadata.
ffmpeg -i input.mkv -codec copy -metadata "key=value" output.mkv