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AM62A7: Minimum video encode rate

Darren Jenkins
Genius 12481 points
Part Number: AM62A7

Tool/software:

Sitara team,

What is the minimum video encode rate possible with the video encode module in the AM62A7?  (I need the data rate of the output of the video encoder.)

The customer can use H.264 or H.265. 

For example, the spec can be expressed as kbps/megapixel image size or Mbps for a given frame size and frame rate.

I don't see this in section 7.4 of the TRM.

Thanks,
Darren

  • 0
    TI__Mastermind 28295 points

    Hi Darren,

    There is no single minimum bitrate defined by the ITU-T for all H.264 video. 

    Achievable bitrate depends on various factors:

    -Resolution & Framerate

    -Desired Quality

    -Encoder Settings

    Usually ITU-T standard defines levels and profiles. These levels specify constraints on values of syntax elements in the bitstream, which in turn place limits on factors like maximum resolution, frame rate, and bitrate. 

    You can check for Encoder settings using the below command on target.

    Best Regards,

    Suren

  • 0 in reply to Suren Porwar
    TI__Genius 12481 points

    Hi Suren,

    I understand.  I'm asking more about our encoder that is built into the device, not the standard.

    It may be easier to answer this question based on a specific resolution and frame rate.  So if it is 1080p60, ie. 1920x1080 at 60 fps, assume the encoder settings are such that the encoder provides the lowest data rate, what is that data rate?

    Thanks,

    Darren

  • 0 in reply to Darren Jenkins
    TI__Mastermind 28295 points

    Hi Darren,

    8-12 Mbps is a good sweet spot for bitrate to have achievable quality and decent file size. 

    Please refer the below link: 

    https://pixflow.net/blog/what-is-bitrate-in-video-2025-ultimate-guide-to-optimizing-video-quality-and-exports/

    Another thing that matters is the GOP. If you are choosing IPPPP then this could be more achievable. Remember, we don't have any B frame capability. 

    if you have a lot of I-frames within the 60 frames, then bitrate will also need to be higher since these are fully encoded frames. 

    Hope this helps

    Best Regards,

    Suren