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I have an avi file and tried to check it as suggested here. But after a short while I just got a segmentation fault, without any other information!

How is it possible to fix/repair this avi file? Watching this file with mplayer just works fine, using it with ffmpeg or kdenlive is causing errors!

System: Ubuntu 13.10 Size file: 4.2 GB

Addition:

Here is part of the output(begin and end) when running the command (the FULL output is about 1 MB of text!)

ffmpeg -v error -i file.avi -f null -

Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Press ctrl-c to stop encoding
[dvvideo @ 0x21f39c0] AC EOB marker is absent pos=64
    Last message repeated 1 times
.....
(These kind of lines repeat over and over and over. I really do not see a point providing them all. There are no build information. Interlaced in the output are lines like:
frame=  124 fps=  0 q=0.0 size=      -0kB time=4.00 bitrate=  -0.0kbits/s
)
....
    Last message repeated 3 times
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=69
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=65
    Last message repeated 1 times
    [dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=71
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=75
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=64
    Last message repeated 2 times
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=70
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=71
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=67
[dvvideo @ 0x1fad9c0] AC EOB marker is absent pos=65
Segmentation fault (core dumped)
Alex
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    What's wrong with the avi file? Why don't you show the actual errors? Can you provide a small sample file that will allow us to attempt to duplicate whever issue you are experiencing? Your `ffmpeg` command and the complete console output are important information. – llogan Jan 31 '14 at 00:36
  • As mentioned in the question, I got a `segmentation fault`, without any other message output. Maybe I can enable some debugging for `ffmpeg`? If so, how? – Alex Feb 04 '14 at 11:29
  • I have updated the question with some of the output ffmpeg` created. If people want to have a sample: How to create this sample? – Alex Feb 12 '14 at 19:24
  • Yes, I do not think this is possible. Its about 1 Megabyte! If you give your email address, I can email you the complete 1 Mega-Byte output of the command !!! – Alex Feb 12 '14 at 19:31
  • See updated question – Alex Feb 12 '14 at 19:34
  • The build information is missing. Provide the first ~50 lines of the console output, and provide the last ~50 lines of the console output. – llogan Feb 12 '14 at 19:35
  • With the command as specied above I get the output as given above. Again: I get EXACTLY the output as given above. There is NO build information. Again: There is no build information. I ONLY get the output as above! If you need other information please provide a way to get it! – Alex Feb 12 '14 at 19:37
  • Then I can only suggest to [download a recent `ffmpeg` build](http://ffmpeg.org/download.html#LinuxBuilds) and test with it. – llogan Feb 12 '14 at 19:40
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    In [this thread](http://trac.ffmpeg.org/ticket/828) at least the errors of "AC EOB marker is absent" was caused by the x264 that ffmpeg was using, which was fixed by installing gpac-devel-static (on fedora). – harrymc Feb 12 '14 at 19:46
  • post the output of mplayer -identify filename.avi – Costin Gușă Feb 13 '14 at 15:36

2 Answers2

7

try using mencoder (the encoding part of mplayer) like this: 

mencoder -idx problemfile.avi -ovc copy -oac copy -o reindexedfile.avi

(via http://www.kahunaburger.com/2010/01/30/fixing-an-avi-index-with-mencoder/)

Giacomo1968
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Costin Gușă
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2

Force index

mencoder -forceidx input.avi -o output.avi -oac copy -ovc copy

Copy all

mencoder -ovc copy -oac copy input.file -o output.file

Also see https://stackoverflow.com/questions/894903/how-can-i-validate-a-video-file-from-a-script

Community
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