On Thu, 2007-08-02 at 17:31 +0200, Michael Riepe wrote:
> Hi!
> 
> Chris wrote:
> 
> > The problem is that when tsfile reads in the file it is failing to find
> > the any audiostreams and so is not populating the audiolist in the
> > popup.
> 
> Yep. There is an AC-3 audio stream, but dvbcut doesn't recognize it
> because the AC-3 frames are not aligned to PES packet boundaries.
> 
> Good news: the stream is perfectly valid.
> 
> Bad news: it's dvbcut's fault.
> 
> There are SI tables in the stream, including a PAT (program association
> table) and a PMT (program map table). The former points to the latter,
> and the latter must contain an AC-3 descriptor for every AC-3 audio
> stream (according to the DVB specs). By inspecting these tables, you can
> find out which stream contains what (MPEG/AC-3/DTS audio, video,
> subtitles, teletext and so on).
> 
What tools do you use to examine the stream?
Where is a good place to start to learn to interpret them?

> But: some receivers/recorders don't write the tables to disk, so you
> have to guess. This is what dvbcut currently does, but it guesses wrong
> if the audio frames aren't aligned. Converting the transport stream to a
> program stream may help, but only if the converter re-packages the audio
> track (the program I use doesn't, and dvbcut -batch won't work either,
> for obvious reasons).
> 
I use WebScheduler to capture. It has an option to capture all PIDs
belonging to a program.

> I guess it will take a while to fix that.
> 
I am willing to give it a try but first need to learn how to read the
stream.
Regards,
Chris


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