extracting from file with corrupted header? important, searching, properly, problem

andy

Sorry if this is the wrong place, but I've got this problem with an important avi file. I need to encode subtitles on it and put it into a mkv format, but even though I can watch the file fine with both MPC and WMP, apparently the header is corrupted and virtualdub won't open it. I've tried searching, but I couldn't find the information I needed.

Anyway thing is, if I can watch it properly, the file should be pretty much still intact right? Or, I thought that I should at least be able to at least extract the video and audio streams.

With virtualdub I got quot;this AVI file doesn't have a movie data block (movi)quot;, with DivXRepair it is quot;Bad Frame Report from DivxRepairquot;, and GSpot says quot;while processing chunk /RIFF:AVI /LIST:INFO, found bad length value 40 at file offset 0x0000ffbequot;.

Is there anyway to fix this?

Try to fix it with Mencoder:

Code:
mencoder -oac copy -ovc copy -o out.avi in.avi
or if that doesn't work, force index rebuilding when reading the input:

Code:
mencoder -forceidx -oac copy -ovc copy -o out.avi in.avi
Edit: Oh, and mencoder is probably called mencoder.exe in Windows (don't remember how the command line worked anymore).

try directshowsource() method ^_^


Originally Posted by nmTry to fix it with Mencoder:

Code:
mencoder -oac copy -ovc copy -o out.avi in.avi
or if that doesn't work, force index rebuilding when reading the input:

Code:
mencoder -forceidx -oac copy -ovc copy -o out.avi in.avi
Edit: Oh, and mencoder is probably called mencoder.exe in Windows (don't remember how the command line worked anymore).

Thanks for the tip; that first code worked nicely!
The second didn't like the file though.... XD

PS: just out of interest, what's the directshowsource() method?

that's creating a .avs (avisynth) file only containing

directshowsource(quot;c:\broken.aviquot;)

and loading that instead of the avi directly into VD. of course you need to have avisynth installed for that to work..

moved