[linux-dvb] Bad TS from dvb-t recording?

Torbjörn Lundquist torbjorn.lundquist at googlemail.com
Fri Mar 9 10:38:31 CET 2007


Thanks. When I tried with 8192 it worked. But then I got all programs in the
mux and the file got extremely big so I want only one program in my
recording.

When I come home I will try with some other pid configurations. My goal is
to have VLC to play the TS-stream, with lipsync.

When playing with mplayer I got video and audio out of sync. How do I fix
that?

Andrea, I'll come back to you with the MUX-recording.

Regards
/Torbjörn



2007/3/9, Andrea Venturi <a.venturi at cineca.it>:
>
> Torbjörn Lundquist wrote:
> > That solved it! Thanks.
> >
> > But how do I record a specific program in a mux? If I point out the
> > video and sound pids for a program with
> >
> > dvbstream -f 522000 -o -tm 8 1249 1248 > recordings/test.ts
> >
> > The stream does not play in VLC.
>
> can you try with the wildcard pid 8192.
>
> dvbstream -f 522000 -o -tm 8 8192 > recordings/test.ts
>
> it just means "get all the TS" (supposed your card&driver are good to
> dump all the stream without hardware pid filtering AND you are on a
> large enough link i.e. NOT on a USB 1.1 bus!)
>
> as i told you, it's a 24Mbps streams (3MB per sec) at least here in
> italy, this is the usual bit rate for DVB-T transmission


BTW in DVB-H transmission there's only a mere 5Mbps net payload .. we
> already have two or three in Bologna. mobile tv is all about reliability
> thru redundancy!
>
> then play it with VLC and should be able to wade thru the hierarchy of
> the TS and show you all the services available in the mux in the
> Navigation menu.
>
> tell us it works this way AND you'll be on the right track.
>
> it could not work AFAIK ONLY IF you have a really poor signal but the
> resulting file should show it. do this simple comparison between:
>
> - size_of_dump
>
> - time_of_rec_in_seconds * 3MB
>
> if they are similar, you have a good ts,
>
> if the size of the dump is really short, you don't have a good ts.
>
> anyway, i see you get all the relevant table of this mux, so you should
> be able to dump a quite clean stream.
>
>
> now, i just see in this mux the presence of MHP interactive applications.
> this is actually my main business here in italy, so i'd like to ask you
> if you can put on a website a 3 min full dump (should be a 500MB size..)
> to let my download it (then you can erase it..).
> i like to study what's going on abroad!
>
> bye
>
> andrea venturi
>
>
>
>
> > Here are the pids I got from dvbsnoop:
> >
> > dvbsnoop -s pidscan
> > dvbsnoop V1.4.00 -- http://dvbsnoop.sourceforge.net/
> >
> > ---------------------------------------------------------
> > Transponder PID-Scan...
> > ---------------------------------------------------------
> > PID found:    0 (0x0000)  [SECTION: Program Association Table (PAT)]
> > PID found:    1 (0x0001)  [SECTION: Conditional Access Table (CAT)]
> > PID found:   18 (0x0012)  [SECTION: Event Information Table (EIT) -
> > other transport stream, present/following]
> > PID found:   41 (0x0029)  [SECTION: DVB CA message section (EMM/ECM)]
> > PID found:   57 (0x0039)  [SECTION: DVB CA message section (EMM/ECM)]
> > PID found:  870 (0x0366)  [SECTION: Program Map Table (PMT)]
> > PID found:  871 (0x0367)  [SECTION: MHP- Application Information Table
> > (AIT)]
> > PID found:  872 (0x0368)  [SECTION: DSM-CC - Download Data Messages
> (DDB)]
> > PID found:  878 (0x036e)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found:  879 (0x036f)  [PES: ITU-T Rec. H.262 | ISO/IEC 13818-2 or
> > ISO/IEC 11172-2 video stream]
> > PID found:  880 (0x0370)  [SECTION: Program Map Table (PMT)]
> > PID found: 1002 (0x03ea)  [SECTION: DSM-CC - Download Data Messages
> (DDB)]
> > PID found: 1004 (0x03ec)  [PES: private_stream_1]
> > PID found: 1010 (0x03f2)  [SECTION: Program Map Table (PMT)]
> > PID found: 1011 (0x03f3)
> > PID found: 1012 (0x03f4)  [SECTION: DSM-CC - Download Data Messages
> (DDB)]
> > PID found: 1016 (0x03f8)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found: 1017 (0x03f9)  [PES: private_stream_1]
> > PID found: 1018 (0x03fa)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found: 1019 (0x03fb)  [PES: ITU-T Rec. H.262 | ISO/IEC 13818-2 or
> > ISO/IEC 11172-2 video stream]
> > PID found: 1021 (0x03fd)  [SECTION: MHP- Application Information Table
> > (AIT)]
> > PID found: 1022 (0x03fe)  [SECTION: DSM-CC - Download Data Messages
> (DDB)]
> > PID found: 1026 (0x0402)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found: 1027 (0x0403)  [PES: private_stream_1]
> > PID found: 1028 (0x0404)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found: 1029 (0x0405)  [PES: ITU-T Rec. H.262 | ISO/IEC 13818-2 or
> > ISO/IEC 11172-2 video stream]
> > PID found: 1241 (0x04d9)  [SECTION: MHP- Application Information Table
> > (AIT)]
> > PID found: 1242 (0x04da)  [SECTION: DSM-CC - U-N messages (DSI or DII)]
> > PID found: 1248 (0x04e0)  [PES: ISO/IEC 13818-3 or ISO/IEC 11172-3 audio
> > stream]
> > PID found: 1249 (0x04e1)  [PES: ITU-T Rec. H.262 | ISO/IEC 13818-2 or
> > ISO/IEC 11172-2 video stream]
> > PID found: 1280 (0x0500)  [SECTION: Program Map Table (PMT)]
> > PID found: 1290 (0x050a)  [SECTION: Program Map Table (PMT)]
> > PID found: 5050 (0x13ba)  [SECTION: Program Map Table (PMT)]
> > PID found: 5070 (0x13ce)  [SECTION: Program Map Table (PMT)]
> > PID found: 5180 (0x143c)  [SECTION: Program Map Table (PMT)]
> > PID found: 8191 (0x1fff)
> >
> >
> >
> >
>
>
>
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