Re: [Redbutton-devel] Small changes to rb for Fedora 9

[Simon K. <s.k...@er...>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1



Andrea wrote:
> Simon Kilvington wrote:
> 
>> not sure why the audio does not play in News Multiscreen - it works for
>> me - the error you get seems to suggest it is trying to open an audio
>> stream that does not exist - if you run rb-browser with the -v flag and
>> send me a log of the output, I'll see if I can work out what is going
>> wrong
> 
> I have run it with -v and I have uploaded the file here
> 
> http://xoomer.alice.it/enodetti/log/rb-br.log
> 
> Interesting to note is the following:
> 
> MHEGStreamPlayer_setAudioStream: tag=53
> MHEGStreamPlayer_play: service_id=16768 audio_tag=53 video_tag=0
> Unable to open MPEG stream (16768, 53, 0)
> ElementaryAction_set_variable
> OctetStringVariableClass: ~//s/newsloops.mhg 93; SetVariable
> SetVariable: OctetString '~/c/vidloop4'
> Processing next asynchronous event
> Generated event: ~//s/newsloops.mhg 87; content_available
> Processing next asynchronous event
> Generated event: ~//a 134; stream_stopped
> Processing next asynchronous event
> Generated event: ~//a 136; stream_playing
> MPEG TS demux: ignoring unexpected PID 404
> MPEG TS demux: ignoring unexpected PID 403
> MPEG TS demux: ignoring unexpected PID 406
> MPEG TS demux: ignoring unexpected PID 405
> 
> The News Multiscreen channel broadcasts with the following PIDs:
> 
> Video: 202
> Audios: 403, 404, 405, 406
> 
> Could it be that rb is expecting 53 instead of one of the audios?
> 
> Andrea
> 

MHEG uses "association tags" which are mapped onto PIDs - can you do:

rb-download 16768

then in another terminal use netcat to connect to port 10101 (this is
the port rb-download listens on) and type "assoc", ie:

nc 127.0.0.1 10101
assoc

this should tell us what tags map to what PIDS - here's what I got:

srk@earwig ~ $ nc 127.0.0.1 10101
assoc
200 OK
Tag     PID     Type
===     ===     ====
(audio) 0       0
(video) 0       0
1       202     6
101     301     11
102     302     11
103     303     11
104     304     11
105     305     11
110     312     11
115     313     13
2       403     3
51      404     6
52      405     6
53      406     6
.

it's also a bit odd that you get those message saying "ignoring
unexpected PID 404" etc - that seems to imply that it has opened the
MPEG stream, but it contains PIDs that we are not expecting - the PIDs
we want are supposed to be filtered out by the hardware

to help debug where the open stream is failing, you could look at the
open_stream function in MHEGBackend.c - everywhere you see a return NULL
you could put a printf so we can see what is causing the failure

- --
Simon Kilvington


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFIUj7Smt9ZifioJSwRAlzdAKCAQuBIwjj6/Ukvcvqq1Na0/VSxNwCfUWbq
hvtWFEn0Qe6VZmSYIsbIRtU=
=m0b6
-----END PGP SIGNATURE-----