Sound streams detection error (1 Viewer)

[AlexPlas]

Hello

I've found an error in the sound streams detection. On the channel "NatGeo Wild HD" my provider broadcasts two sound streams - Russian and English in MPEG format, but MediaPortal shows in the sound streams selection menu four streams - Russian and English in both MPEG and AC3 formats. I've attached archive with logs from server and client and few seconds of TS recorder.

 

[Owlsroost]

Hello

I've found an error in the sound streams detection. On the channel "NatGeo Wild HD" my provider broadcasts two sound streams - Russian and English in MPEG format, but MediaPortal shows in the sound streams selection menu four streams - Russian and English in both MPEG and AC3 formats. I've attached archive with logs from server and client and few seconds of TS recorder.

Mmm - interesting...

 

[mm1352000]

Indeed

28-11-2013 18:19:43.681 audio pid: 191 language: rus type: M
28-11-2013 18:19:43.682 audio pid: 191 language: rus type: A
28-11-2013 18:19:43.682 audio pid: 1c3 language: eng type: M
28-11-2013 18:19:43.682 audio pid: 1c3 language: eng type: A

It looks like the stream is marked as MPEG 2 but has AC3 descriptors. This is tricking TsWriter and/or TsReader into logging and/or displaying info for 4 streams, but actually there are only two in the TS. AC3 streams are meant to be marked as private so the provider is non-compliant.

@AlexPlas
A short (~20 seconds) raw stream dump would be helpful to properly analyse. TsWriter modifies the PMT etc. in recordings and timeshift files.
http://wiki.team-mediaportal.com/1_MEDIAPORTAL_1/18_Contribute/4_Development/Debugging/TS_Dumps

 

[AlexPlas]

Here is the raw stream dump. This channel is broadcasted by IPTV provider, so I don't know if the IPTV source filter doesn't change the stream.

 

[mm1352000]

Thanks Alex

The dump confirms what I thought. Technically the provider's PMT is non-compliant. I think we could modify TsWriter and TsReader to ignore the AC3 descriptors... but it would not fix the PMT in recordings. It feels like a dirty solution. Are you able to contact the provider and ask them to remove the descriptors?

mm

 

[AlexPlas]

Thank you mm

I'll try to contact the provider and try to explain the problem, but have a very little hope