Pixel Aspect Ratio DM8168

Currently, the only two resolutions supported on the SD VENC are NTSC and PAL and for these resolutions, DAR is same as SAR.

Regards,

Brijesh

In my opinion I can use Vcap_setDynamicParamChn(... VCAP_RESOLUTION); to set capture resolution for examples 720x576 od 720x480 for PAL / NTSC

Than I have Storage Asspect Ratio 720x575 = 5:4 or 720x480 = 3:2.

Display Aspect Ratio depends on the connected display 4:3 od 16:9.

How can SAR and DAR be the same ?

You are trying to use SD VENC, correct? But SD VENC, output can be either NTSC or PAL, DAR will either 720/484 or 720/576, the same resolution frame will be passed to SD VENC correct?

Regards,

Brijesh

For me DAR (Display Aspect Ratio) is 4:3 or 16:9.

SAR (Storage Aspect Ratio) depends  on selected Resolution PAL -> 720x576 or NTSC 720x480 or am I wrong ?

For encoder we made a extension to set Sample Aspect Ratio via API.

So we are able to insert Sample Aspect Ratio information in H264. We do this for 4:3 is works as expected.

The problem we got here is to adapt 16:9 or 4:3 displays at SD video output.

I also use Wide Screen Signaling but not all displays support this feature.

So the solution can be to change the Pixel Aspect Ratio for 16:9. I think PAR currently is constant for a 4.3 DAR ?

I have found a solution using the scale capabilities of swms mosaic module.

I set the size of mosaic window if 4:3 or 16:9 is selected via parameter to get the correct aspect ratio.

But for future it would be interesting if itis possible to have direct access to registers that set pixel aspect ratio.

Is it possible to set pixel aspect ratio in any (unknown) registers ?

Hi,

Does this mean you change the output window size in swms depending on the aspect ratio?

Regards,

Brijesh

If a 16:9 display is used, I reduce mosaic with and shift mosaic x to get a pillarbox.