[mythtv-users] Stuttering on some mpg files (PrebufferEnoughFrames)

[Ian Evans]

Just went back to look at a series I had lossless cut back in the time when
some of us were running the .25 mythttranscode under .26.  (Now running .27
fixes)

I noticed that a few of my mpeg files were stuttering like a car on a bumpy
road, filling up he logs with:

Dec 21 20:58:28 buster mythfrontend.real: mythfrontend[28393]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(7): Waited
203ms for video buffers AAAAdDALAdAAAA
Dec 21 20:58:28 buster mythfrontend.real: mythfrontend[28393]: N
CoreContext mythplayer.cpp:2130 (PrebufferEnoughFrames) Player(7): Waited
306ms for video buffers AAAAdDALAdAAAA

I looked at other recordings and they were fine MKV rips played fine. But
these few mpg files were stuttering. I have watched them before but
suddenly they can't be watched due to the herky-jerky playback.

Any ideas what could suddenly be causing this on just these files? If I
play it with Windows Media across the network. it plays fine. But it
stutters like crazy on my FE/BE. Again, have played these files in the past
no problem.

Here's an ffmpeg -i on one:

ffmpeg version N-39855-g35e0496 Copyright (c) 2000-2012 the FFmpeg
developers
  built on Apr 15 2012 17:45:02 with gcc 4.5.2
  configuration: --enable-gpl --enable-libfaac --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora
--enable-libvorbis --enable-libx264 --enable-nonfree --enable-version3
--enable-x11grab
  libavutil      51. 46.100 / 51. 46.100
  libavcodec     54. 14.101 / 54. 14.101
  libavformat    54.  3.100 / 54.  3.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 70.100 /  2. 70.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mpeg, from 'Rock Center With Brian Williams - S2E35 - .mpg':
  Duration: 00:42:58.10, start: 0.298367, bitrate: 12856 kb/s
    Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR
1:1 DAR 16:9], 14716 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x80]: Audio: ac3, 48000 Hz, 5.1(side), s16, 384 kb/s

MythTV Version : v0.27-122-g9d4b5e2
MythTV Branch : fixes/0.27
Network Protocol : 77
Library API : 0.27.20131107-1
QT Version : 4.8.1
Options compiled in:
 linux profile use_hidesyms using_alsa using_oss using_pulse
using_pulseoutput using_backend using_bindings_perl using_bindings_python
using_bindings_php using_crystalhd using_dvb using_firewire using_frontend
using_hdhomerun using_ceton using_hdpvr using_ivtv using_joystick_menu
using_libcec 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_vaapi using_vdpau using_ffmpeg_threads using_mheg using_libass
using_libxml2

Thanks!
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