[mythtv-users] USA OTA - interlaced?

Andre mythtv-list at dinkum.org.uk
Wed May 9 19:11:14 UTC 2012


On 9 May 2012, at 20:59, Devin Heitmueller wrote:

> On Wed, May 9, 2012 at 2:48 PM, Matt Garman <matthew.garman at gmail.com> wrote:
>> Is there a way to tell if a given recording is interlaced or not?
>> FWIW, I'm in Chicago, IL, USA.  We record the national networks,
>> primarily FOX ("WFLD 32").
>> 
>> I ask for the following reason: a while ago, I started experimenting
>> with using Intel (Sandy Bridge) graphics, so I could lose my
>> power-hungry Nvidia card.  During initial testing, I disabled
>> de-interlacing in my playback profile.  And to this day, I still don't
>> have any interlacing enabled, because everything plays back
>> beautifully.
>> 
>> So either I am recording progressive content, or my TV (Panasonic
>> TC-P65V10) is doing the deinterlacing for me.
> 
> Probably the fastest way to check is run ffmpeg against the recording
> and look at the height/width.  A height of 720 is progressive and 1080
> is interlaced (it is possible to have 1080 progressive, but you'll
> never see it in an OTA broadcast).

Um, well in the UK there are transmissions that switch between 1080i and 1080p on Freeview HD, there are also some Sky HD satellite transmissions at 1080p25.

Some of the (American) encoder manufacturers told me they have had this feature for some time, so maybe it will be used.

Andre


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