[mythtv] [mythtv-firehose] mythtv/master commit: 3870b0777 by Daniel Thor Kristjansson (daniel-kristjansson)

Taylor Ralph taylor.ralph at gmail.com
Mon Sep 26 11:58:17 UTC 2011

On Mon, Sep 26, 2011 at 7:29 AM, Stuart Morgan <stuart at tase.co.uk> wrote:
> On Sunday 25 Sep 2011 14:45:42 Gavin Hurlbut wrote:
>> On Sun, Sep 25, 2011 at 2:06 PM, MythTV <noreply at mythtv.org> wrote:
>> > I've also added a small hack for NTSC and PAL video, if the number
>> > of lines in the video is 480 or 576 we assume the video is interlaced.
>> > After watching a poorly mastered DVD one too many times I decided
>> > this hack was necessary. The DVD override for still frames will
>> > still ensure that those are not deinterlaced, this is just for the
>> > autodetection in the video.
>> This would force 480p recordings to be treated as 480i, would it not?  I
>> guess it's only the *auto*deinterlace, but still, that could be annoying for
>> those few recordings.  Just a thought.
> I was actually pretty close to implementing this myself, for PAL DVDs at a
> bare minimum. Like Daniel I've got some badly mastered DVDs and it's not an
> acceptable solution to require users to force de-interlacing from the menu for
> these. It's pretty certain that commercial DVD players assume all content is
> interlaced since the spec (as I read it) doesn't allow for 480p or 576p.

We could, in addition, use FPS to determine if interlaced or not. That
way a properly detelecined (23.976 FPS) transcode is detected as
progressive. So for NTSC content if it's 29.97 assume interlaced and
progressive if 23.976 or 59.94.


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