[FFmpeg-user] 31bit limit of -analyzeduration and -probesize

Carl Eugen Hoyos cehoyos at ag.or.at
Fri May 23 16:41:55 CEST 2014

Oliver Fromme <oliver <at> fromme.com> writes:

> For example, there is one MPEG2 file with several subtitle
> tracks.  One of them (ID 3, i.e. PID 0x23) begins at roughly
> 55 minutes into the movie, which is somewhere near byte offset
> 2.5 GB in the MPEG2 file.  Unfortunately I cannot specify
> such a value for the -analyzeduration and -probesize options,
> the maximum seems to be 2147M.  But with 2147M, ffmpeg doesn't
> find the track

Did you confirm that the track can be found if you cut 
away the first 500M from the file?

I am not sure if -probesize can be extended to 64bit 
without a version bump but I first would like to be 
sure that this would solve the problem.

Carl Eugen

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