[x264-devel] 2pass Encoding private data mismatch

[Wojciech Myrda]

Hi,

The problem has been discovered in the Doom9 Forum with using x264. 
Creating several (2 or more) files with "automatic 2 pass encoding" 
under Megui with the same avs script and encoder settings should make 
them compatible for joining together. Up to version 2216 it was, but 
some time between 2217 and 2230 where problem has been confirmed as real 
change has been made that regardless of encoding settings the joining of 
file in the MKVToolnix is no longer resulting in playable file. Program 
itself warns of "private data mismatch".

"Warning: The track number 0 from the file 'D:\mp4\rt dok 03 02 - 2.mp4' 
can probably not be appended correctly to the track number 0 from the 
file 'D:\mp4\rt dok 03 02 - 1.mp4': The codec's private data does not 
match (lengths: 42 and 42). Please make sure that the resulting file 
plays correctly the whole time. The author of this program will probably 
not give support for playback issues with the resulting file.  "

The files 1 & 2 by themselves play just fine

more info:
http://forum.doom9.org/showthread.php?p=1619276#post1619276

PS If more windows builds would be available between 2217 and 2230 I'll 
be happy to test exactly which change has triggered this problem if that 
would help get this bug squashed faster.

Regards,
Wojciech