[mythtv-users] HD-PVR burn to blu-ray without transcode?

[Andre Newman]

On 25 Jan 2013, at 12:23, Paul Check wrote:

> Thx Andre and William. I have tried Premiere Pro/Encore and have yet to figure out if its possible with those programs to avoid transcoding.   So far not.

I did something similar with Encore a year or two ago at a friend's company (sorry don't remember the details) I think I had to split the transport stream into raw h264 & ac3 then re-combine.


>  The mythtv wiki pages states that the stream is a "slightly modified mpeg 2 transport stream".  Since m2ts is part of the blu-ray spec I was hopeful this would work, but so far it seems transcoding is necessary.  P

In my experience only re-muxing is required, not re-encoding, the resulting m2ts is definitely different to the original broadcast mpeg2 transport stream, much simpler for a start. I have access to professional transport analysis tools such as Streamexpert so it's easy to see what got changed.

I don't yet know if the variable playability I have seen is caused by the way the h264 is encoded by the broadcaster or some discrepancy in the m2ts that Toast generates.

There was a lot of discussion around the net a few years ago about re-muxing film4 transmissions, they used such a long gop that it was massively out of spec for DVD but still most players were happy to play the disks.

Andre

> 
> ----- Reply message -----
> From: "William Powers" <wepprop at gmail.com>
> To: "Discussion about MythTV" <mythtv-users at mythtv.org>
> Subject: [mythtv-users] HD-PVR burn to blu-ray without transcode?
> Date: Thu, Jan 24, 2013 8:26 am
> 
> 
> 
> On Jan 23, 2013, at 12:54 PM, "Paul Check" <paul at thechecks.ca> wrote:
> 
> > Hi: I have an HD-PVR, working wonderfully in MythTV, Debian unstable. 
> > Myth produces .mpg files and I'm using Premiere Elements to process
> > (including making menus, etc) and burn to blu-ray.  I'm wondering if Myth
> > is recording the material in a format that could go directly to blu-ray
> > without transcoding.  In the Myth set-up page I see options for audio type
> > (AAC or A3C), but not option for video format/container/whatever :).
> > 
> > In the software that comes with the HD-PVR there are three options, one
> > being TS format.
> > 
> > Thx for any pointers, Paul
> 
> The authoring software I use will author 720p AC-3 files straight from the HD-PVR but not 1080i files. However, I cannot definitively say whether the authoring software is too picky or whether the HD-PVR files are non-standard. Or both.
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users