[mythtv-users] Comcast mpeg4 switching to 720p

[Jon Heizer]

On Wed, Nov 2, 2016 at 3:15 PM, John Adams <mythtv at onevista.com> wrote:

> On Wed, 2 Nov 2016 16:02:16 -0400
> Peter Bennett <cats22 at comcast.net> wrote:
>
> > Now that Comcast have started using x264 for some channels I have
> > noticed that the 1080i channels are switching to 720p when they switch
> > to x264. This seems to be official policy - see below.
> >
> > http://forums.xfinity.com/t5/Non-X1-Service/1080i-channels-
> are-being-changed-to-720p60-channels/td-p/2778182
> >
> > They seem to view this as an improvement. I wonder why those channels
> > used 1080i in the first place if 720p is superior. I also wonder if
> > they have approval from their cable channel providers to do this.
> >
> > Up to now it is only cable channels that have switched. The broadcast
> > channels are still mpeg2 1080i.
> >
> > Peter
> >
> 1080i30  is only 540p30
> 720p60 is much superior with respect to motion
>
> johna
>
>
>
>

I've had h264 from comcast for a while.  It looks like they have also
changed channels that were previously h264 1080i to 720p.

Example:

Velocity Sept 28th
  Duration: 00:31:59.85, start: 47977.132767, bitrate: 3727 kb/s
    Stream #0:0[0x125a]: Video: h264 (High), yuv420p(tv, bt709), 1920x1080
[SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    Stream #0:1[0x125b](eng): Audio: ac3 (AC-3 / 0x332D4341), 48000 Hz,
5.1(side), fltp, 384 kb/s

Oct 26th
Duration: 00:32:00.35, start: 82055.426378, bitrate: 3713 kb/s
    Stream #0:0[0x125a]: Video: h264 (High), yuv420p, 1280x720 [SAR 1:1 DAR
16:9], Closed Captions, 59.94 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    Stream #0:1[0x125b](eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384
kb/s


Same show for both.

In reality which is better, I really have no clue.  1080p sure would have
been nice though.

Jon
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