[mythtv-users] Transcoding options

John Pilkington J.Pilk at tesco.net
Fri Jan 31 13:10:03 UTC 2014


On 31/01/14 12:39, Tony Gould wrote:
> First of all, apologies because I feel like I should know this already
> and it should be obvious, but I still don't really understand it after
> searching the web and archives.
>
> At the moment, by default, I cut out ads for the stuff I record, and
> then I have a number of different transcoding profiles set up. They all
> go to MPEG-4 (the RTjpeg option fails for me), and I vary the bitrate
> between 1000 (cartoons) and 2400 (action movies) to get low, medium and
> high quality transcoding jobs available.
>
> First of all, is what I'm doing sensible, or optimal? I hear others
> talking about different types of encoding, and I wonder if the built-in
> options that I'm using are really the best way. E.g. is it possible to
> get the same quality at a lower disk space, or reduce the transcoding
> time for the same  quality?
>
> Also, can someone please explain in simple terms why I get an nuv file
> out of this and not an mp4 (or avi) file out? It would be really nice
> just to be able to export the files directly out of my recordings
> directory without having to go through a tool like nuvexport. (Once
> again, apologies as this is probably obvious to a lot of people). My
> vague understanding of file formats is that things like avi (and nuv?)
> are just containers for a number of different formats within the file,
> so if nuv contains MPEG-4 after transcoding can't I just play it directly?
>
> Thanks,
>
> Tony.

Yes, I had occasion to look at these options recently.  I think they are 
outmoded.  This thread might be worth pursuing, although IIRC it got 
somewhat tangled.  I think the low_quality_transcode script looks a 
better bet as a starting point - but I haven't tried using it.

John P

http://www.gossamer-threads.com/lists/mythtv/users/559390#559390

http://www.gossamer-threads.com/lists/mythtv/users/560113#560113





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