[linux-dvb] Re: ts2es, ts dumper

[Robert Wills <robert.wills@dicta.org.uk>]

I had the same problem.  My solution was less elegant:

dumprtp | ts2es 432 | buffer -s 300000 | mpg321 -

I kept getting blips until at 300000 they went away.

I'll try your program.


On Fri, 2003-01-31 at 21:41, Franck Arnaud wrote:
> I had a problem with radio channels (or TV sound used that way),
> with the usual:
> 
> dumprtp | ts2es | mpg123 -
> 
> Streaming from dvbstream this was not really usable: the sound 
> has an acute 'blip' every half second or so. rtptsaudio has 
> a similar problem, with lots of white noise instead of blips.
> Problem is too regular to be in the data, and indeed using 
> an intermediary file was much better.
> 
> To debug that I wrote some pedantic TS/PES/ES parser, with 
> an option to do the same as ts2es. It works, but I don't 
> really know why. I had various ideas about the stream 
> processing, but none very convincing. Couldn't find anything 
> obvious trying to look at rtptsaudio code and the included 
> mpegtools code. My current supposition is that it's a buffering
> pipe issues and mine works because it does write (stdout, ) on 
> PES boundaries, which ts2es may not do. It is probably triggered 
> by some combinations of circumstances here (my sound 'card' is 
> USB, so maybe there's an issue there). Anyway, if someone has 
> a similar problem you may want to give it a try, the program 
> is at:
> 
> http://www.nenie.org/misc/mpsys/
> 
> It also includes a dumper for all of the TS/PES/ES(audio) 
> headers, with continuity checking, so it may also be useful 
> to check that a stream is well formed or see all the 
> info in the packet headers. The packet parser can be used as a 
> library.
> 
> --
> franck@nenie.org
> 
> 
> 
> -- 
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