[mythtv-users] Losing audio on "lossless" transcode

David Boxall spamtrap at boxall.name
Sat Oct 18 22:55:00 UTC 2008


On 18/10/2008 12:29 PM, Michael T. Dean wrote:
> On 10/17/2008 08:39 PM, Nick Morrott wrote:
>> Does it lose the audio track entirely, or does it default to the
>> silent MP2 track that a lot of UK DVB-T recordings contain? I solely
>> use ProjectX for demuxing and fixing streams, but if the internal
>> player can successfully select the correct audio track to use,
>> mythtranscode _should_ (although it may not at the moment) be able to
>> also.
>
> And did you try hitting + to select the next audio track to see if it 
> really is gone or just playing the wrong track?

mythbackend.log shows:

> 2008-10-15 09:06:17.351 AFD: Opened codec 0x81f60e0, id(MPEG2VIDEO) 
> type(Video)
> 2008-10-15 09:06:17.356 AFD: codec AC3 has 0 channels
> 2008-10-15 09:06:17.362 AFD: Opened codec 0x81f6d50, id(AC3) type(Audio)
...
> 2008-10-15 09:06:17.503 AFD: codec AC3 has 0 channels
> 2008-10-15 09:06:17.511 NVP: Disabling Audio, params(0,0,0)


ProjectX shows only MP2 audio in the input files and no audio track in 
the output files.  All of the DTV-T transport streams I've examined had 
working MP2 audio.  That's only half a dozen streams though.  I'm in 
Australia.

-- 
David Boxall                    |  Drink no longer water,
                                |  but use a little wine
                                |  for thy stomach's sake ...
                                |            King James Bible
                                |              1 Timothy 5:23


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