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OMAP L138 VPIF

Ralf Herrmann
Prodigy 10 points
Other Parts Discussed in Thread: OMAP-L138

If I use VPIF at the OMAP L138, is it possible to encode the video to h.264 or MJPEG? Has the OMAP enough power to do this and which frame rate can I expect depending on the resolution?
Thanks for your help.

  • 0
    TI__Mastermind 24340 points

    Hi Ralf,

    We do not have official numbers for h.264 and MPEG performance for OMAP-L13x yet.

    I will look into it and let you know if I find an estimation.

     

  • 0
    TI__Mastermind 24340 points

     

    HI Ralf,

    Here are some estimated numbers: 

    Test Case

    H264_DEC_3

    H264_DEC_4

    MPEG4_DEC_1

    MPEG4_DEC_2

    MPEG4_DEC_3

    MPEG4_DEC_4

    MPEG4_DEC_5

    Data Rate

    VBR, 4 Mbps

    VBR, 3 Mbps

    CBR, 1 Mbps

    CBR, 10 Mbps

    CBR, 300 Kbps

    VBR, 3 Mbps

    VBR, 2 Mbps

    Resolution

    D1

    VGA

    CIF

    D1

    QVGA

    VGA

    VGA

    FPS

    24.93

    35.21

    96.87

    33.69

    129.97

    52.25

    44.27

     

     

    H264_ENC_1

    H264_ENC_2

    H264_ENC_3

    H264_ENC_4

    H264_ENC_5

    Data Rate

    10 Mbps

    8 Mbps

    5 Mbps

    4 Mbps

    4 Mbps

    Resolution

    QVGA

    CIF

    VGA

    D1-NTSC

    D1-NTSC

    ChromaFormat

    4:2:0

    4:2:0

    4:2:0

    4:2:0

    4:2:2

    FPS

    39.2

    31.79

    14.57

    13.81

    12.97

     

    For MPEG 4 encoder:

    Number of channels 1
    Max resolution D1
    Max bit rate 5Mbps
    FPS 30 (see Comment)
    Profiles supported SP

    But these numbers were achieved reading and writting to a file, so you can expect a 10 - 20 % of decrease when using  the hardware.

     

  • 0 in reply to Mariana
    TI__Intellectual 2620 points

    If you are also interested in Motion JPEG ("If I use VPIF at the OMAP L138, is it possible to encode the video to h.264 or MJPEG?") then the JPEG Encoder is included with the SDK.

  • 0 in reply to Mariana
    Prodigy 10 points

    Hi Mariana,

     

    can you publish the sample code used for this performance estimation. I have a big problem to get MPEG4 encoder example (designed for C64+) running on L138 (DPS encoder only)?

     

    Thanks in advance

  • 0 in reply to ti33
    Intellectual 835 points

    Hi

    Could you tell me how you performed the tests? Did you use the sample H264 and MPEG4 implementations that are present in the Codec Engine release for OMAP-L138?

    Regards
    Szymon