[linux-dvb] MPEG2 capture? good format?

[Chris Pitchford <nova-t@intrepid.cx>]

Hi all,

I'm just wondering if anyone has any opinions on what I'm trying to do.

I'm using a Nova-T card, which sadly has no TV-out option. I'm also trying
to capture TV programs, for later transcoding to smaller formats
(Mpeg4/mpeg1), basically a crude PVR. Being a beginner I'm using
DVBstream-0.4pre2..

dvbstream -f freq <vpid> <apid>   to grab the appropriated channel

dumprtp | ts2ps <vpid> <apid> | tee source.mpg | mplayer -cache 4096 -
	to capture the stream and dump to a file

The resultant source.mpg file, although plays under MPlayer and XINE,
isn't recognised by trancode (which I was hoping to use to transcode into
MPEG1 streams)

I've noticed the mplex tool that is in the apps/mpegtools directory of the
driver. I was hoping I might be able to use this to "repair" or alter the
source.mpg file into a format that may be compatible with transcode. Or
alternatively just use mplex itself (since it does mention MPEG1 formats
such as vcd)

When I attempt to use the tool, it complains the file is notusable:

# mplex -f 0 -o mpeg1.mpg source.mpg
   INFO: [mplex] mplex version 2.2.1 ($Date: 2002/02/04 19:06:14 $)
**ERROR: [mplex] File source.mpg unrecogniseable!
**ERROR: [mplex] Unrecogniseable file(s)... exiting.

I've also tried the NEWSTRUCT driver's version of mplex, which works:

mplex -t MPEG1 -i PS_STREAM -o mpeg1.mpg source.mpg

but the resultant file has digital artifacts and errors when playing back
under Mplayer/Xine that the source.mpg file does not exhibit.

I'm just wondering if anyone has any pointers for a good route for
grabbing a program and transcoding to MPEG1 (perferably with transcode)

I'm currently looking at DTV and VDR, though these seem to require a card
with tv out.. In the mean time, any pointers would be greatly appreciated.

On another note I have manged to get my Wintv/pvr and Nova-t cards working
correctly. Thanks to all for the help. In the end a renaming of tuner.o to
dvbtuner.o and an alteration to the order in which modules were loaded
seems to have fixed the problem

Thanks all






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