[mythtv-users] Long delays with remote occasionally

Yeechang Lee ylee at pobox.com
Wed Jun 17 19:58:43 UTC 2009


Josh Mastronarde <jmastron at gmail.com> says:
> Can you give more details -- perhaps the command line you used for the
> transcode,

The built-in mythtranscode, with the MPEG-4 codec. The transcodes were
made three years ago, though, so I'm not sure I could give you the
exact options I used. The source material is always MPEG2. The
resulting recordings replaced the source in Watch Recordings: In other
words, I did in-place transcoding as opposed to exporting them to
MythVideo.

> and the output of "ffmpeg -i <file>.mp4"?

An affected recording:

FFmpeg version 0.5-30.el5, Copyright (c) 2000-2009 Fabrice Bellard, et
al.
  configuration: --prefix=/usr --libdir=/usr/lib64
  --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared
  --enable-gpl --enable-postproc --enable-swscale --enable-avfilter
  --enable-avfilter-lavf --enable-pthreads --enable-x11grab
  --enable-vdpau --disable-avisynth --disable-libamr-nb
  --disable-libamr-wb --enable-libdc1394 --enable-libfaac
  --enable-libfaad --enable-libfaadbin --enable-libmp3lame
  --enable-libtheora --enable-libvorbis --enable-libx264
  --enable-libxvid --extra-cflags=-O2 -g -pipe -Wall
  -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
  --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC
  --disable-stripping --extra-cflags=-I/usr/include/nvidia-graphics
  --extra-ldflags=-L/usr/lib64/nvidia-graphics
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Mar 15 2009 14:08:04, gcc: 4.1.2 20080704 (Red Hat
  4.1.2-44)
Input #0, mpeg, from
'/misc/server/mythtv/store/1183_20060324103400.mpg':
  Duration: N/A, start: 47715.723144, bitrate: N/A
    Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 1920x1080 [PAR 1:1
    DAR 16:9], 14000 kb/s, 59.94 tbr, 90k tbn, 59.94 tbc

and here is a recent, untranscoded recording from the same channel:

FFmpeg version 0.5-30.el5, Copyright (c) 2000-2009 Fabrice Bellard, et
al.
  configuration: --prefix=/usr --libdir=/usr/lib64
  --shlibdir=/usr/lib64 --mandir=/usr/share/man --enable-shared
  --enable-gpl --enable-postproc --enable-swscale --enable-avfilter
  --enable-avfilter-lavf --enable-pthreads --enable-x11grab
  --enable-vdpau --disable-avisynth --disable-libamr-nb
  --disable-libamr-wb --enable-libdc1394 --enable-libfaac
  --enable-libfaad --enable-libfaadbin --enable-libmp3lame
  --enable-libtheora --enable-libvorbis --enable-libx264
  --enable-libxvid --extra-cflags=-O2 -g -pipe -Wall
  -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector
  --param=ssp-buffer-size=4 -m64 -mtune=generic -fPIC
  --disable-stripping --extra-cflags=-I/usr/include/nvidia-graphics
  --extra-ldflags=-L/usr/lib64/nvidia-graphics
  libavutil     49.15. 0 / 49.15. 0
  libavcodec    52.20. 0 / 52.20. 0
  libavformat   52.31. 0 / 52.31. 0
  libavdevice   52. 1. 0 / 52. 1. 0
  libavfilter    0. 4. 0 /  0. 4. 0
  libswscale     0. 7. 1 /  0. 7. 1
  libpostproc   51. 2. 0 / 51. 2. 0
  built on Mar 15 2009 14:08:04, gcc: 4.1.2 20080704 (Red Hat
  4.1.2-44)
Input #0, mpegts, from
'/misc/server/mythtv/store/1183_20090602034900.mpg':
  Duration: 02:41:45.82, start: 22625.282722, bitrate: 14072 kb/s
  Program 1 
    Stream #0.0[0x210]: Video: mpeg2video, yuv420p, 1920x1080 [PAR 1:1
    DAR 16:9], 14000 kb/s, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0.1[0x211](eng): Audio: ac3, 48000 Hz, stereo, s16, 384 kb/s

I don't know why the first one is labeled mpeg2video when, as noted, I
always used MPEG-4 when transcoding.

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