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

Andrea Venturi a.venturi at cineca.it
Fri Mar 9 10:21:54 CET 2007


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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