[mythtv-users] IPTV Recording: No Sound. Audio codec problem?
nate at crosno.net
Fri Jan 19 13:48:21 UTC 2007
My apologies if you get this more than once... I never saw it come
through and I've been having some email issues.
Never got any hits on this, but I have found out a little more. Mplayer
is able to play the sound from these files, but it's way out of sync
with the video...better than nothing though. Here is part of the output
Opening audio decoder: [liba52] AC3 decoding with liba52
dec_audio: Allocating 3840 bytes for input buffer.
dec_audio: Allocating 6144 + 65536 = 71680 bytes for output buffer.
COLLECT_SECTION, start: 64, size: 184, collected: 184
SKIP: 0+1, TID: 0, TLEN: 13, COLLECTED: 184
PARSE_PAT: section_len: 13, section 0/0
PROG: 35 (1-th of 1), PMT: 2
AC3: 2.0 (stereo) 48000 Hz 192.0 kbit/s
A52 flags before a52_frame: 0x2A
A52 flags after a52_frame: 0x2
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)
Any ideas on how to get it playing in Myth is greatly appreciated!
Trying not to go through the video screen.
From: Nate Crosno
Sent: Tuesday, January 09, 2007 11:38 AM
To: 'Discussion about mythtv'
Subject: IPTV Recording: No Sound. Audio codec problem?
Hi All, I'm reposting a previous question to the list but breaking out
the more pressing question at the moment, adding more info, and changing
the subject line...
I have been able to view and save the IPTV streams on the Myth box that
are going to my little Amino STB by splitting the cable with hub. I can
save the stream with a command like this:
vlc udp:@22.214.171.124:2001 --ts-dump-file test.mpg
Or I can view the stream with either of these commands:
...however I do not get any sound. I copied the test file to a windows
box and did get sound when watching VLC. I have tried to compare the
file with known good files saved off my HD DVB card and cannot tell the
difference -- both have A/52 set as the audio codec and MPEGTS for video.
Using "midentify", I get the following when comparing the saved IPTV
file to a known good HD file:
Ati HD Wonder File IPTV File
Any ideas on how to get the audio working would be greatly appreciated.
Also, I tried to play the IPTV file in myth via "mythtv test.mpg", but
that bombed out. I can provide logs if anyone is interested.
Once I get the sound playing at all, I'll worry about step 2, which is
getting Myth to record and play the files.
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