[mythtv-users] transcoding HDTV files

[John Sturgeon]

John Patrick Poet wrote:

>On Sun, 30 May 2004, Angel Li wrote:
>
>  
>
>>Hola,
>>
>>Is anyone able to transcode HDTV .nuv files? If you are having success,
>>would you mind posting your shell script?
>>
>>I've had some "success" but I had to patch one of mplayer's libraries
>>before I could use mencoder. Now, I'm searching for the right
>>incantation for generating clean looking, small size DiVX files.
>>
>>I just recently, ie yesterday, got my MythTV computer put back together
>>running Fedora 2 and nVidia drivers and the 2.6.6 driver from
>>pchdtv.com. It's an Athlon 3000 machine and I still get stuttering when
>>the OSD fades away while watching live TV.
>>    
>>
>
>Sorry, have not tried to transcode...
>
>Out of curiosity, how well does your machine playback HDTV if you disable
>XvMC?  On my 2.8 GHz HT P4, I get MUCH smoother playback with XvMC
>disabled.  I would think that an Athlon 3000 would be powerful enough to
>see the same affect.
>
>John
>  
>
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>  
>
I have not had success with MythTV transcoding HDTV files, but I've been 
using a combination of ProjectX and 'transcode' to do it.

I have had success using a couple other tools.  Currently, I use 
ProjectX (took me a while to get through the German documentation and 
support)  to cut commercials and demux the ac3 stream and the MPEG2 
video from the MPEG-TS (Transport Stream) in the .nuv file.  It does 
some nice error correction along the way.  Once I get the two demuxed 
files, I use transcode to put them back together, and shrink them to a 
manageble Xvid file.  I also reduce the resolution by two (960x540).  I 
have had some success doing this.  I'm not the most accomplished 
transcode user so I'm not sure I'm getting the best results from my 
work.  Also, there just aren't a lot of people out there transcoding 
HDTV on Linux yet.  I've exprimented with quite a few settings for 
transcode to get the best quality XviD file, so if you want some tips, 
let me know.  My main problem is that swift pans can look kind of 
jerky.  I don't know how to get them to smooth out.

--
John Sturgeon <><