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Timming and format for mvSADout

Yulin
Expert 1625 points

Hi there,

When I evaluate H264ENCv1’s mvSAD output for some applications, I find the encoder is slower when mvSADoutFlag=1 than mvSADoutFlag=0.
Is this the nature of the H264ENC v1 only or both v1/v2 ?
Any solution to remove/reduce this delay ?

BTW, I see the output (following) is different from MV_SAD_usage_info.pdf
SAD
MV_HD (or _VD, I am not sure)
MV_VD (or _HD, I am not sure)
Between MV_SAD_usage_info.pdf and my observation, which one is right ?
Is the mvSAD output format of V1 same to that of V2?

Please help to clarify these issues, thanks!

Yulin

  • 0
    TI__Expert 8465 points

    Hi Yulin,

    Which platform you are talking?.

    If you are using DM36x below reply will be applicable;

    Yes when we enable mvsad, you can slight reduction encoder performance.

    format of mvsad:  mvX (lower 16bit), mvY (higher 16bit) and SAD(next 32 bit). You can testapp and userguide for more information.

    What you mean when you say v1/v2 codec? you mean 1.0 and 2.0 platinum version codecs?

    What resolution you are running and what is the expected fps?

  • 0 in reply to Veeranna Hanchinal
    Expert 1625 points

    Hi Veeranna,

    It is a DM365.
    The format observed is different from what you said.
    Please confirm this point.

    Yes, they are 1.0 and 2.0 platinum version codecs.
    Precisely, they are REL_210_V_H264_E_HP_DM365_01_00_00_20 and REL_210_V_H264_E_HP_DM365_02_20_00_07.
    Is the mvSAD output format of V1 same to that of V2?

    30fps 720p with mvSAD out at 270MHz DM365 is expected.
    Is there any solution to remove/reduce the delay introduced by mvSAD output ?

    Thanks & regards,
    Yulin.

  • 0 in reply to Yulin
    TI__Expert 8465 points

    Hi

    Yulin said:
    The format observed is different from what you said.
    Please confirm this point.

    Yes mvsad format is correct. what format you observed?. You can check this thing in standalone testapp. or userguide.

    Yulin said:
    Is the mvSAD output format of V1 same to that of V2?

    Yes its same.

    Yulin said:
    Is there any solution to remove/reduce the delay introduced by mvSAD output ?

    Which encQuality mode you are using? if post all parameters we can suggest some param setting for faster mode.

    You can also have look at http://processors.wiki.ti.com/index.php/DM36x_system_optimization

    Thanks,

    Veeranna