[FFmpeg-user] Using ffmpeg to "rescue" a damaged dvd

vsethi at iglou.com vsethi at iglou.com
Fri Feb 27 00:03:34 CET 2015

I have an unfinalized, somewhat damaged dvd, NTSC video format.  Dvdisaster
has written what it can salvage into an ISO file.

Although it doesn't know how long the image is (over 4 hours), VLC
Media Player is able to play the ISO file.  (It begins with the assumption 
that the file is one hour long but plays the whole thing anyway.)  No other
package can do anything with it.

Is it possible to use ffmpeg to restore the missing header, navigation
packets, etc., into a copy of this ISO file so that other software/devices
can play it?

I've tried:  ffmpeg -i source.iso -target ntsc-video source.out

ffmpeg quits quickly with a series of error messages:

Format mp3 detected only with low score of 1, misdetection possible!
Header missing
Stream #0: not enough frames to estimate rate; consider increasing probesize
decoding for stream 0 failed
Could not find codec parameters for stream 0 <Audio: mp1, 0 channels, s16p>:
unspecified frame size
Consider increasing the value for the 'analyzeduration' and 'probesize' options

I haven't been able to figure out how to increase analyzeduration and probesize
nor what values to increase them to.

Any suggestions would be appreciated.  Thanks.

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