[FFmpeg-devel] ffmpeg skips the first I-frame in my cameras mp4 files

William R. Zwicky wrzwicky
Sat Aug 8 07:15:34 CEST 2009

Now that I've answered a question you didn't ask, perhaps I can ask a 
question you can't answer. =^p

I just got an HD camcorder (Sanyo FH1), and am trying to edit the files 
with purely open-source tools.  Cinelerra works brilliantly but can't 
directly edit mp4 files, so I need to pre-process them with ffmpeg.  
Unfortunately the first second of video is corrupted on every file it 
converts.  It looks like ffmpeg skips over the first I-frame, and only 
processes the P-frames.  As soon as the next I-frame comes along, the 
output clears up and looks fine.

Anyone willing to look into this?  If not, got any suggestions where to 


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