[mythtv-users] aspect ratio of home video recordings in video library

[Jeremy Jones]

On Sat, Feb 9, 2013 at 10:42 AM, Jeremy Jones
<jeremy.dwain.jones at gmail.com>wrote:

>
>
> On Sat, Feb 9, 2013 at 10:18 AM, Jay Ashworth <jra at baylink.com> wrote:
>
>> ----- Original Message -----
>> > From: "Jeremy Jones" <jeremy.dwain.jones at gmail.com>
>>
>> > both ffprobe and mediainfo report the DAR as 16:9 and the resolution
>> > as 720X480.
>> >
>> > Just to see what would happen I ran the file through mkvmerge with the
>> > following command:
>> > mkvmerge -o test.mkv --aspect-ratio 0:'16/9' test.mpg
>> >
>> > here is the resultant file:
>> > test.mkv <http://db.tt/oCOoeWYM>
>>
>> This plays correctly in mplayer2, which says:
>>
>> VIDEO:  720x480  29.970 fps  8900.0 kbps (1112.5 kB/s)
>> Aspect ratio is 1.78:1 - scaling to correct movie aspect.
>> VO: [xv] 720x480 => 853x480 Planar YV12  [fs]
>>
>> Right, but if you drop it in your video library and play it with myth,
> does it recognize the 'scaled dimensions' should be:  853x480 ?  or does it
> display at the 720x480 resolution?
>
> Can anyone answer this question?


>
> That aspect should be 1.85:1 for 16:9, and 720x480 is actually D1 4:3 (or
>> very close*), with the expected 0.9:1 pixel aspect; it only becomes a
>> widescreen image aspect if you assume square pixels.
>>
>> I'm not sure what you are trying to tell me here.  Are you saying that
> myth is doing the right thing and that I need to actually transcode the
> video to *force* square pixels to make myth display the video correctly?
>  From what I have gathered the video stream is standard mpeg-2, NTSC which
> is 720x480, and the PAR is 32:27, which *should* yield a resultant display
> resolution of 853x480.
>
>


Am I misinterpreting something above?

Does this seem to be a video codec issue?

Does this seem to be a mythTV issue?

Have I given too little information for anyone to help?

If so, what should I post?

Did anyone drop my 2 second video clip into their video library to see if
it displayed as a 16:9 image?

Any help here would be appreciated.

Thanks,

Jeremy
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