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Linux/AM5728: H.264 Encode problem

WTMEC_Will Hsu
Expert 2620 points
Part Number: AM5728


Tool/software: Linux

Hi TI team


I'm testing H.264 Encode on AM572x Evaluation Module.
I use the following command to Encode a video.

gst-launch-1.0 -v -m --gst-debug=*rtmp*:5 \
videotestsrc is-live=1 \
! "video/x-raw, width=1920, height=1080, framerate=30/1" \
! queue \
! ducatih264enc \
! h264parse \
! flvmux streamable=true name=mux \
! rtmpsink location="rtmp://live-api-s.facebook.com:80/rtmp/xxxxxx"

When I decode the h.264 file, the resolution is 1920x1088.
Why the resolution is 1920x1088 ??

How to fix the problem ?

From Will Hsu

  • 0
    TI__Guru* 80190 points
    Hello,

    What is the PSDK version that you are using here?
    What is the decoding pipeline that you are using?
    Is the decoding pipeline executed on EVM?

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    TI__Guru* 80190 points

    Hello,

    I ran some tests on my side.

    Here is my observations:

    1. Encode->parse->qtmux->save in file:

    gst-launch-1.0 -v  \

    videotestsrc num-buffers=500 \

    ! "video/x-raw, format=(string)NV12, width=1920, height=1080, framerate=30/1" \

    ! queue \

    ! vpe \

    ! ducatih264enc level=level-51 profile=high \

    ! queue \

    ! h264parse \

    ! qtmux \

    ! filesink location=test_resolution.mov

    In the log file I see the resolution on the ducatih264enc's input/output is 1920x1080.

    /GstPipeline:pipeline0/GstDucatiH264Enc:ducatih264enc0.GstPad:sink: caps = video/x-raw, format=(string)NV12, width=(int)1920, height=(int)1080, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1

    /GstPipeline:pipeline0/GstDucatiH264Enc:ducatih264enc0.GstPad:src: caps = video/x-h264, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, stream-format=(string)byte-stream, align=(string)au, num-reorder-frames=(int)3, profile=(string)high, level=(string)4

    /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:sink: caps = video/x-h264, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, stream-format=(string)byte-stream, align=(string)au, num-reorder-frames=(int)3, profile=(string)high, level=(string)4

    On the h264parse input I see the same resolution 1920x1080:

    /GstPipeline:pipeline0/GstH264Parse:h264parse0.GstPad:src: caps = video/x-h264, width=(int)1920, height=(int)1088, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, stream-format=(string)avc, align=(string)au, num-reorder-frames=(int)3, profile=(string)high, level=(string)4, interlace-mode=(string)progressive, parsed=(boolean)true, alignment=(string)au, codec_data=(buffer)01640028ffe1003e27640028ad84054562b8ac5471080a8ac57158a8e210248521393c9f27e4fe4fc9f279b9b34d081242909c9e4f93f27f27e4f93cdcd9a6cac0780227e54001000528de01ae2c

    But on the parser output I see height is reported as 1088. It seems it is aligned to 16.

    If you  check the file on PC I see the resolution is 1920x1080.

    2. No parser involved:

    gst-launch-1.0 -v  \
    videotestsrc num-buffers=500 \
    ! "video/x-raw, format=(string)NV12, width=1920, height=1080, framerate=30/1" \
    ! queue \
    ! vpe \
    ! ducatih264enc level=level-51 profile=high \
    ! queue \
    ! filesink location=test_resolution1.h264

    The resolution on the input of the filesink is 1920x1080:

    /GstPipeline:pipeline0/GstFileSink:filesink0.GstPad:sink: caps = video/x-h264, width=(int)1920, height=(int)1080, framerate=(fraction)30/1, pixel-aspect-ratio=(fraction)1/1, stream-format=(string)byte-stream, align=(string)au, num-reorder-frames=(int)3, profile=(string)high, level=(string)5.1

    Hope this helps.

    BR
    Margarita

  • 0 in reply to Margarita Gashova
    TI__Guru* 80190 points
    Hello,

    Please if this answers your question click the "This resolved my issue" button.
    If you have new question you could open a new e2e thread.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Expert 2620 points
    Hi Margarita
    Thanks for your reply.
    I'll test your suggestion.
  • 0 in reply to WTMEC_Will Hsu
    TI__Guru* 80190 points

    Hello,

    Sure. If you have new questions/issues open a new thread. I will close this one.

    In my previous answer, I forgot to add the result of the first pipeline on PC :

    BR
    Margarita