[mythtv-users] DVB-T Transcode

mike choy mike at acaciaclose.co.uk
Fri Jan 20 23:44:09 UTC 2006

Tim Milstead wrote:
> It's not clear to me how to set up transcoding for DVB-T cards.
> I have an Avermedia 771 card and I am using Ubuntu 5.10. They both work 
> well.
> In recording profiles there already exists a hardware dvb encoders entry 
> and I also have the option to create a DVB entry.
> What is the difference? I thought all DVB cards just took the MPEG2 
> stream and wrote it to disk. Where is the need for the hardware distinction?
> Which profile should I be using if I want to transcode to MPEG4?
> I have done some fiddling around and I managed to some how get a DivX 
> file (I might have accidentally done this with nuvexport) - is this the 
> MPEG4? It had some artifact and sound glitches in it - is there 
> something I need to do to avoid these?
> Thanks in advance,
> Timie Milie.
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Hi Tim

The DVB MPEG stream is MPEG-2 but its wrapped up in a container which 
syncs the audio and video.
You do need to unwrap the mpeg before you can transcode to mp4 or 
whatever. The complication comes from
resyncing your audio and video streams, hence the problems you are finding.

I understand that 0.19 will have an integrated mpeg exporter (actually I 
think the devs ae going to just record straight to MPEG2)

Here is write up on my website on exporting your dvb streams and saving.

Mike C


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