[Ffmpeg-devel] Odd Missing Video Results

Myron Stewart mavmann
Wed Jun 7 00:02:50 CEST 2006


I have been using the ffmpeg library for a project and for some odd reason
seeking past the the start on these 2 particular files is causing the video
to be missing. The file size seems to indicated video was added, but when
you attempt to play the video in for example mediaplayer, quicktime, or vlc,
there is only audio. One thing I did notice is that both of these files have
swapped audio channels where the audio is on channel 0 and the video is on
channel 1.

I also did a test with ffmpeg.exe using the ss option to seek ahead and get
the same problem. For some reason the ffmpeg library thinks that the first
stream is a video stream instead of an audio stream. Here are the 2 files:

I am using the following options:

ffmpeg -y -ss 00:00:20.0 -i D:\TEST\MPG\mpeg1\Gothard1.mpg -t 00:00:18.0
-acodec copy -sameq D:\TEST\MPG\export\gothard1_test.mpg

- Myron L Stewart

More information about the ffmpeg-devel mailing list