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ffmpeg -ss gray artifact at first frames

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carlos solano
ffmpeg -ss gray artifact at first frames
on Jul 13, 2011 at 4:28:19 pm

Hello I m trying to take parts of a mov, into another mov, splitting&appending from my "zi6 kodak h264 quicktime movs" hd videos, i have 250 clips of around 10 or 15 seconds each, from lot of places, locationes around the globe and want to combine them in a single big clip.
I can merge them very good with "mkvmerge".
The problem is that the first frames of all videos in the collection (splitted with ffmpeg), are gray or with artifacts at beggining, I do not know how to explain, maybe wrong ffmpeg commands, not taking keyframes to cut, I'm doing this (whit batch command line, which is great / fast for me):

=======begin of batch file
ffmpeg -i jockey_club_fpv.mov -ss 00:00:17 -t 00:00:24 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3a.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:04:40 -t 00:00:20 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3b.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:05:35 -t 00:01:00 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3c.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:07:11 -t 00:00:10 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3d.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:07:45 -t 00:00:21 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3e.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:08:47 -t 00:00:05 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3f.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:09:18 -t 00:00:10 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3g.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:09:35 -t 00:00:09 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3h.mov

ffmpeg -i jockey_club_fpv.mov -ss 00:10:07 -t 00:00:16 -g 1 -sameq -vcodec copy -vf fade=in:0:30 partes3i.mov

mkvmerge -o join4.mov partes3a.mov + partes3b.mov + partes3c.mov + partes3d.mov + partes3e.mov + partes3f.mov + partes3g.mov + partes3h.mov + partes3i.mov
=======end of batch file

Thanks a lot for any answer!!


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