Re: [mythtv-users] DVB-T Transcode

2006-01-21 Thread Tim Milstead




mike choy wrote:

  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.
http://acaciaclose.co.uk/28654/124502.html

Mike C
  

Thanks Mike for the heads up. Your information is very useful and
something I will probably need in the future. Unfortunately it doesn't
answer my question. I was asking about automatic transcoding in the
recording profiles.

Thanks,

Tim

  
 





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[mythtv-users] DVB-T Transcode

2006-01-20 Thread Tim Milstead
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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Re: [mythtv-users] DVB-T Transcode

2006-01-20 Thread mike choy
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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 mythtv-users mailing list
 mythtv-users@mythtv.org
 http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users

   
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.
http://acaciaclose.co.uk/28654/124502.html

Mike C

 





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