[mythtv-commits] Ticket #3612: One ATSC channel (ABC) is not recording the audio or audio track does not play

[MythTV]

#3612: One ATSC channel (ABC) is not recording the audio or audio track does not
play
-----------------------+----------------------------------------------------
 Reporter:  anonymous  |       Owner:  danielk
     Type:  defect     |      Status:  new    
 Priority:  minor      |   Milestone:  unknown
Component:  dvb        |     Version:  head   
 Severity:  medium     |     Mlocked:  0      
-----------------------+----------------------------------------------------
 Library API version     : 0.20.20070327-1
 Source code version     : 13582M
 Network Protocol Version: 34
 Options compiled in:
  linux release using_v4l using_arts using_ivtv using_dbox2 using_hdhr
 using_iptv using_live using_dvb using_x11 using_xv using_xrandr
 using_frontend using_backend using_bindings_perl

 I have been trying to trouble-shoot this problem for at least a month and
 Daniel K. has been trying to help out. It only started in May on my ABC
 channel. Everything appears to record correctly but I get no audio on
 playback. I also verified that mplayer and mythtranscode have problems
 with the audio track also. Mythbackend shows it is recording stream#0
 mpeg2 and stream#1 aac audio. I can view this channel ok on my OTA turner
 and can also playback a file that I 'cat' right from the dvb device. Using
 an Air2PC tuner. Have tried different cards. All channels work but this
 one. Seems to be related to the writing of the streams from the backend
 since I can play a file recorded directly from the device. I have attached
 a zip with four log files.

 mythnoaudio.log is the backend log of a 5 minute recording of channel 4-1
 with mythbackend -v channel,record,siparser. I am also using patch #3409
 per Daniels suggestion. It shows the PIDS being parsed and that if finds
 both the mpeg2 and aac audio streams.

 mythtranscode_bad.log shows mythtranscode's error on the same file.

 mplayernoaudio.log show mplayer trying to find the appropriate streams
 from the recorded file and how it only finds the video stream. Audio
 stream is not found.

 ffmpeg_tomp3_good.log is just ffmpeg striping video and saving audio to an
 mp3 on a good file for comparison.

 ffmpeg_tomp3_bad.log is just ffmpeg striping video and saving audio to an
 mp3 on the bad recording. Cannot parse the audio stream.

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Ticket URL: <http://svn.mythtv.org/trac/ticket/3612>
MythTV <http://svn.mythtv.org/trac>
MythTV