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Original question:

TMDSEVM572X: TMDSEVM572X

TMDSEVM572X: TMDSEVM572X

Aaron Garner
Prodigy 55 points

Part Number: TMDSEVM572X

Hello

When we want to decode the TS files in TMDSEVM572X unit and display them on HDMI, the output video is displayed in slow motion.

We use the following command for decoding:

gst-launch-1.0 filesrc location=/home/root/NASA_TV_HD.ts ! tsdemux ! h264parse ! ducatih264dec ! vpe ! 'video/x-raw,format=(string)NV12,width=1280,height=720, framerate=(fraction)60000/1001' ! queue ! kmssink driver-name=omapdrm connector-id=57 force-modesetting=false sync=false

The slow motion happens with any other TS file that we have tested. But the other files with h264 and mov  format have no problem regarding the speed of the video

Regard

  • 0
    TI__Guru** 113810 points

    Hi Aaron,

    Without having access to the file and its properties it is hard to say what could be going wrong.

    1. Would you be able to share the properties of the file from ffmpeg or similar?

    2. And then, have you done any experiments to figure out the cause of the slow motion by removing any plugins in the pipeline to see if it makes a difference? Is the slow motion caused by a load on the A-15? Any observability that you can share?

    Regards

    Karthik

  • 0 in reply to Karthik Ramanan
    Prodigy 55 points

    Hi Karthik

    Thank you for yuor reply.

    1. Would you be able to share the properties of the file from ffmpeg or similar?

     A sample of our considered file is attached.We use the following command for decoding:

    gst-launch-1.0 filesrc location=/root/enc.ts ! tsdemux ! h264parse ! ducatih264dec ! vpe ! 'video/x-raw,format=(string)NV12,width=1920,height=1080, framerate=(fraction)50/1' ! queue ! kmssink driver-name=omapdrm connector-id=54 force-modesetting=false sync=false

    2. And then, have you done any experiments to figure out the cause of the slow motion by removing any plugins in the pipeline to see if it makes a difference? Is the slow motion caused by a load on the A-15? Any observability that you can share?

       The CPU load is low. And we do not have any problems with load. Also using any TS format file, we faced the same problem.

    Note:

     -If the output is on HDMI, the decoded video will be played at low speed.

    Following commands are used:

    gst-launch-1.0 filesrc location=/home/root/enc.ts ! tsdemux ! h264parse ! ducatih264dec ! vpe ! 'video/x-raw,format=(string)NV12,width=1920,height=1080, framerate=(fraction)50/1' ! queue ! kmssink driver-name=omapdrm connector-id=57 force-modesetting=false sync=false

     

    - If the video output is on the LCD, the video playback speed is normal.

    Following commands are used: 

    gst-launch-1.0 filesrc location=/home/root/enc.ts ! tsdemux ! h264parse ! ducatih264dec ! vpe ! 'video/x-raw,format=(string)NV12,width=1920,height=1080, framerate=(fraction)50/1' ! queue ! autovideosink

     

    Regard