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Dm8148 scale up/down captured video

Marat Shchuchinsky
Expert 2595 points


Hello TI' teams.

I need to scale up or scale down captured by VIP video.

I'm understood correctly, that scaling performed by ScalarLink only, and scaling is hardware accelerated?

Please let me know what is minimal and maximal scale up and scale down factors for video? And minimal step?  Let me know, please is possible to perform scale up or scale down by rational number, for example, perform scale down by factor 1.4, or scale up by factor 2.15?

I works with dvr-rdk 3.5 from ud-works

ThanX alot

  • 0
    TI__Guru 59700 points

    All of the following links can be used for scaling in DVRRDK:

    1. SclrLink

    2. DeiLink

    3. SwMsLink

    4. CaptureLink (VIP inline scaling)

    5. DisplayLink (only on HDMI , display inline scaler)

    6.MpSclr Link

    All links use one of 5 HDVPSS HW scaler modules.

    The limitations with hw scaler are:

    1. Width should be multiple of 16

    2. Height should be even number

    3. Max input/output resolution -> 1920x1080

    4. Max downscale factor is 1/16

    5.Min scaler resolution is 48x8

    Only MpSclrLink supports greater than1920x1080 input and output is fixed to 1920x1080

     

     

  • 0 in reply to Badri Narayanan
    Expert 2595 points

    Thanks alot for reply.

    Video scaling in all enlisted above links is hardware accelerated?

    Up-scaling supported too? For example: up-scale from 640x480 to 1280x960, or up-scale to rational factor 1.4:

    from 640x480 to 896x672? 

    Are vertical and horizontal scale factors may be not equal?

     

  • 0 in reply to Marat Shchuchinsky
    TI__Guru 59700 points

    Marat Shchuchinsky said:
    Video scaling in all enlisted above links is hardware accelerated?

    _ Yes

    Marat Shchuchinsky said:
    Up-scaling supported too? For example: up-scale from 640x480 to 1280x960, or up-scale to rational factor 1.4:

    - Yes

    Marat Shchuchinsky said:
    Are vertical and horizontal scale factors may be not equal?

    - Yes. Need not be equal

  • 0 in reply to Badri Narayanan
    Expert 2595 points

    Hi Badri,

    thanX alot for your answers. Is scale factor of each enlisted above links can be dynamically changed in run-time?

    and dynamically changed per specified video channel?

  • 0 in reply to Marat Shchuchinsky
    TI__Guru 59700 points

    Yes scale factor can be changed dynamically on a per channel basis