[MPlayer-dev-eng] Ac3 streams detected as LPCM or SPU in TS

[MichaelM]

I've noticed that with a verbose dump of dvbscan, pmt information is 
available, with a pmt for each service offered. How is it that some 
cards offer pmt through mplayer, yet others (such as mine ...) cannot, 
despite the fact that its available?

Since dvbscan can find the pmt's pid, is there harm in using a similar 
approach in mplayer (or even xine)? A quick read through the code shows 
that there's no place for the pmt pid in the dvb input, only the ts 
demuxer makes any reference to the pmt. Also, I'd imagine scanning for 
the pmt would be somewhat slow.

Most of the networks i've found follow a similar pattern for the pmt_pid 
(ranging from 0x0100 -> 0x0101 etc), with one network not following the 
trend.

Just for the hell of it, could I hardcode the pmt_pid in mplayer, just 
to see if it works? My qualm would be where to hardcode, and will it be 
futile if by the time the stream reaches the demuxer, there is no pmt 
(streams caught with dvbstream don't seem to have pmt).

Nico Sabbi wrote:

> 
> software only: in channels.conf you don't have a way to indicate what 
> pid contains the PMT;
> I can easily solve it adding always pid 0 (that gives the PMT) in the 
> filters and you can add +<pmt_pid>
> in one of video/audio fields (as scan indicates extra streams)
>