FFmpeg
From Leo's Notes
This page was last edited on 9 December 2015, at 22:01.
Merging mp4 and m4a
Using ffmpeg you can combine the two together:
command: ffmpeg -i video.mp4 -i audio.m4a -acodec copy -vcodec copy output.mp4
Extracting a video section
To extract a video section:
# ffmpeg -i input.mp4 -ss 00:00:15 -t 00:00:10 -async 1 output.mp4
Where:
| -ss | The start time in HH:MM:SS |
|---|---|
| -t | The length of the video in HH:MM:SS |
Issues
Copying DASH video (via -vcodec copy) using versions older than 0.10 will result in an empty file because it is unable to read the video contents.