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Decoding and displaying non-normal resolution videos on DVR-RDK DM8168

XIONG Zhihui
Intellectual 510 points

Hi, I am using UDworks DVR-RDK to decode and display non-normal resolution videos, the resolution of these videos is 2560*890. My question is:

    (1) Does the decoder in DVR-RDK support this kind of resolution?

    (2) Does the HDMI display in DVR-RDK support this kind of resolution? Since the HDMI resolution is 1920*1080, I am considering to scale the video to display 2560*896, & keep the ratio at the same time. Could you tell me how to scale, and how to display the scaled video?

     Thank you.

       

  • 0
    TI__Guru 59700 points

        (1) Does the decoder in DVR-RDK support this kind of resolution?

         - Yes the decoder supports upto 8MP so you will be able to decode 2560*890

     (2) Does the HDMI display in DVR-RDK support this kind of resolution? Since the HDMI resolution is 1920*1080, I am considering to scale the video to display 2560*896, & keep the ratio at the same time. Could you tell me how to scale, and how to display the scaled video?

      - Can you pls explain more. Do you want to add a custom display resolution in HDMI to display this non-standard resolution ? Does the TV connected to the display support such non-standard resolution ? OR Do you want to scale the video to fit 1920 x 1080 ? RDK 3.5 support a High Mega Pixel scaler which scales resolution greater than 1920 x 1080 and outputs 1920x1080 resolution.

     

  • 0 in reply to Badri Narayanan
    Intellectual 510 points

    Dear Badri,
       Thanks for the reply.
       What I mean is to scale the 2560*890 video to fit 1920*1080 display while keeping the video's aspect ratio.
       Do you mean I need to use RDK 3.5 to do this scaling on 2560*896?
       Thanks again.

  • 0 in reply to XIONG Zhihui
    TI__Guru 59700 points

    Yes to scale 2560 x 896 you have to use RDK 3.5 which has the mpScaler link. Resolution greater than 2048 width requires scaling to be done in slices and this is done only in MpScaler.MpScaler output is always 1920x1080. You have to do additional scaling in SwMs to scale it to correct resolution based on aspect ratio.

  • 0 in reply to Badri Narayanan
    Intellectual 510 points

    Hi Badri, 

         Thanks for your reply. I think that the MpScaler is not what I want, since it scales to 1920*1080, white dose not keep the aspect ratio.  My question is:

         (1) By "...SwMs to scale it ...", do you mean the SwMs is SW Mosaic?

         (2) I am using RDK 2, Could you tell me is it possible to use SwMs to scale 2560*896 videos to 1920*672 (keeping the aspect ratio), and then display the 1920*672 video on 1080P HDMI TV ?

          (3) I find there is SwMsLink in the RDK demo, do you mean I just need to use this link? Or, I need to write a new scaling link which perferms the scaling from  2560*896 to 1920*672 ?

          Thank you

  • 0 in reply to XIONG Zhihui
    TI__Guru 59700 points

         (1) By "...SwMs to scale it ...", do you mean the SwMs is SW Mosaic?

         - Yes

           (2) I am using RDK 2, Could you tell me is it possible to use SwMs to scale 2560*896 videos to 1920*672 (keeping the aspect ratio), and then display the 1920*672 video on 1080P HDMI TV ?

       - As I mentioned you _have_ to use MpScaler for scaling resolution greater than 2048 width. There  is no other option due to h/w limitation.

    (3) I find there is SwMsLink in the RDK demo, do you mean I just need to use this link? Or, I need to write a new scaling link which perferms the scaling from  2560*896 to 1920*672 ?

      - Pls see answer to Q2. I don't think there is any option to preserving aspect ratio since MPScaler only supports 1920x1080 output.

     

  • 0 in reply to Badri Narayanan
    TI__Guru**** 477195 points

    Hi,

    I checked the code and it does not look like any change required to scale from 2560x896 to 1920x672. you can just set the input frame size to 2560x896 and it will do multipass scaling only on width..

    Regards,

    Brijesh Jadav

  • 0 in reply to Brijesh Jadav
    Intellectual 510 points

    Hi Brijesh & Badri,

         I am a little bit confused with the replies. That is OK, I will have a test on both method of what you have told me.

         Thanks