diff options
| -rw-r--r-- | ffmpeg.md | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -11,12 +11,19 @@ Works for audio, too. ffmpeg -i in.mp4 -codec:v copy -codec:a copy -ss START_TIME -t DURATION out.mp4 ffmpeg -ss START_TIME -t DURATION -i in.mp4 -codec:v copy -codec:a copy out.mp4 -## Resize +## Quality + +### Resize ffmpeg -i in.mp4 -s 720x480 out.mp4 # -1 means to automatically preserve aspect ratio ffmpeg -i in.mp4 -filter:v scale=720:-1 out.mp4 +### Bitrate + +* `-b:a 192k`: specify audio bitrate to 192 kbps +* `-b:v 2M`: specify video bitrate to 2 mbps + ## Audio/video delay ffmpeg -i "$input" -itsoffset <offset in seconds> -i "$input" -map 1:v -map 0:a -c:a copy -c:v libx264 "$output" |