[linux-dvb] Re: ?: How I can recording video PES to a file with NAPI

[Ralph Metzler <rjkm@convergence.de>]

Klaus Schmidinger writes:
 > Ralph Metzler wrote:
 > > 
 > > Varga Peter writes:
 > >  > But from which one device should I to read the audio and video PESes
 > >  > together,
 > >  > /dev/ost/demux or /dev/ost/dvr (not TS)?
 > > 
 > > If you use DMX_OUT_TAP, then from  /dev/ost/demux, if you use
 > > DMX_OUT_TS_TAP, then from /dev/ost/dvr.
 > > 
 > >  > If I have to read from /dev/ost/demux, then can I use the filedescriptor
 > >  > of the
 > >  > previous for audio pes or video pes opened /dev/ost/demux device (below
 > >  > demuxAudioDevFd and demuxVideoDevFd) or should I open the /dev/ost/demux
 > >  > again
 > >  > for a new filedescriptor and read from it?
 > > 
 > > You have to use the file handle for which you set the filter of course.
 > > You can read the audio PES stream from your demuxAudioDevFd and the video
 > > PES stream from your demuxVideoDevFd.
 > > Or, if you used DMX_OUT_TS_TAP, you can read a multiplexed TS stream
 > > from one file descriptor which was opened for /dev/ost/dvr.
 > > You can not get a multiplexed PS from this API.
 > 
 > Does this mean that the NAPI does not deliver the same kind of data
 > that the 0.8.2 driver delivers by default when reading from /dev/video?


No, only transport streams or non-multiplexed PES.
But the seperate PES are not really much different to the current PS
and it is much simpler to write a muxer with complete and separate PES
as input.


Ralph



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