Opened 9 years ago

#1795 new defect

x264: 2nd pass has more frames than 1st pass

Reported by: mencoder@… Owned by: reimar
Priority: normal Component: core
Version: 1.0rc3 Severity: normal
Keywords: Cc:
Blocked By: Blocking:
Reproduced by developer: Analyzed by developer:

Description

Hi there!

There is a problem when trying to create x264-vids with mencoder. In 2pass-mode, mencoder creates a different number of frames in the first and second pass.

So for an example, in first pass 3 frames are skipped, in the second pass 4 frames are skipped - with the same mencoder-settings both times.

"""
Skipping frame!
Skipping frame!
Skipping frame!
Skipping frame!
Skipping frame!
spudec: Error determining control type 0x17. Skipping -6 bytes.
x264 [error]: 2nd pass has more frames than 1st pass (145880)
x264 [error]: continuing anyway, at constant QP=22
x264 [error]: disabling adaptive B-frames
"""

This issue made the OGMrip-team add the x264-option "nombtree" to their mencoder commandline as this option is more "tolerant of buggy calling applications"[1]. The x264-team states, that this is a mencoder-issue[2], as well as the ogmrip-team does[3][4].
There was a request concerning this issue in february on the mailing-list[5]. I just wanted to file this issue as a bug as I haven't found any statement from the mplayer-team concerning that.

Sincerely,

Daniel

[1] http://doom10.org/index.php?topic=289.0
[2] http://doom10.org/index.php?topic=61.0
[3] http://sourceforge.net/projects/ogmrip/forums/forum/258033/topic/3513436
[4] http://sourceforge.net/projects/ogmrip/forums/forum/258033/topic/3513436/index/page/2
[5] http://lists.mplayerhq.hu/pipermail/mencoder-users/2010-February/011250.html

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