[mythtv-users] Problems with VC-1 playback?

Neil Salstrom salstrom at gmail.com
Mon Mar 17 05:19:42 UTC 2014

Has anyone else experienced problems playing back videos with VC-1
encoding?  We recently tried watching Sherlock Holmes (2009 version with
Robert Downey Jr.) which is encoded using VC-1.  This was a mkv ripped
using makemkv and had no additional processing or re-encoding.  This is the
only movie in our collection with VC-1 but it's also the only one that is
giving us problems.

The movie will begin to play fine (from either the start or resuming from a
bookmark) but after a few minutes (random intervals and not at the same
spots) will dramatically lose audio / video sync and begin skipping large
numbers of frames at a time.  The movie can be stopped then started again
from the same position and will be fine for a few more minutes.

Relevant info:

mythfrontend --version
Please attach all output as a file in bug reports.
MythTV Version : v0.27-187-g30d86b1-dirty
MythTV Branch : fixes/0.27
Network Protocol : 77
Library API : 0.27.20140303-1
QT Version : 4.8.1
Options compiled in:
 linux profile use_hidesyms using_alsa using_pulse using_backend
using_bindings_perl using_bindings_python using_bindings_php using_dvb
using_frontend using_hdhomerun using_libcrypto using_libdns_sd
using_libfftw3 using_libxml2 using_lirc using_mheg using_opengl
using_opengl_video using_qtwebkit using_qtscript using_qtdbus using_sdl
using_taglib using_v4l2 using_x11 using_xrandr using_xv using_profiletype
using_bindings_perl using_bindings_python using_bindings_php
using_mythtranscode using_opengl using_vdpau using_ffmpeg_threads
using_mheg using_libass using_libxml2

Starting using -v playback shows large amounts of frame dropping due to
video behind audio but I also noticed this error:

2014-03-16 21:55:42.210960 I  Player(0): Video is 5.69804 frames behind
audio (too slow), dropping frame to catch up.
2014-03-16 21:55:42.210995 I  Player(0): Video is 4.92687 frames behind
audio (too slow), dropping frame to catch up.
2014-03-16 21:55:42.211236 I  Player(0): FPS:   22.80 Mean: 43854 Std.Dev:
68885 CPUs: 100% 7% 12%
2014-03-16 21:55:42.211287 I  Player(0): Waiting for video buffers...
2014-03-16 21:55:42.226695 W  VDPAU: Display pre-empted.
2014-03-16 21:55:42.226720 E  VDPAU: Error at mythrender_vdpau.cpp:1534
(#2, The display was pre-empted, or a fatal error occurred.)
2014-03-16 21:55:42.228232 N  VDPAU: Attempting to re-create VDPAU
2014-03-16 21:55:42.229162 I  Player(0): Video is 4.10274 frames behind
audio (too slow), dropping frame to catch up.

I've got the full playback log if anyone is interested...


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.mythtv.org/pipermail/mythtv-users/attachments/20140316/965887ac/attachment.html>

More information about the mythtv-users mailing list