avisync(1) - Linux man page

Name

avisync - adjust audio synchronisation

Synopsis

avisync [ -o file -i file -q -n num -b num -a track -f commentfile ]

Copyright

Description

avisync shift audio on frame basis.

Options

-o name

Specify the name of the output file.
-i file: Specify the name of the input file.
-q be less verbose.
-n count: shift audio by count frames. If count is positive, audio starts with audio frame count at the beginning of the AVI-file. If count is negative, audio is prepended count padding frames.
-a track: Specify the number of the audio channel to shift.
-b num Specify if avisync should write an VBR mp3 header into the AVI file. Default is 1 because it does not hurt. num is either 1 or 0.
-f commentfile: Read AVI tombstone data for header comments from commentfile. See /docs/avi_comments.txt for a sample.

Examples

The command

avisync -i my_file1.avi -o out.avi -n -10

puts 10 audio frames at the beginning of the AVI-file.

E.g. if the audio is delayed about 200 ms (0.2 seconds) and you're working with a 25 frames per second AVI-File, you need to shift the audio 200/40 = 5 frames since one frame is 40 ms long.

Authors

avisync was written by Thomas Oestreich
<ostreich@theorie.physik.uni-goettingen.de> with contributions from many others. See AUTHORS for details.