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Linux/AM5728: File to file H.264 encode and YUYV to NV12

user4594142
Prodigy 110 points
Part Number: AM5728

Tool/software: Linux

（1）when i want to use gstreamer pipeline to encode the H.264 stream，it can execution succeed。but the compiled stream is problematic。

the pipeline ：

gst-launch-1.0 filesrc location=waterfall-352-288-nv12-inp.yuv ! videoparse width=352 height=288 format=nv12 ! ducatih264enc ! filesink location=waterfall-352-288-nv12-inp_gst.h264

（2）VPE by default convert the video to NV12 format. Kmssink only supports NV12 video format。It means to say i  must Color space conversion (YUY2->NV12）？？because I capture the video use the Usb Camera
      the format only support YUYV。
（3）TI provide the gst-plugin，it only support the vip input。can I get the gst-plugin source code？ I want to capture the video use the usb input
  • 0
    TI__Guru**** 393215 points
    The video experts have been notified. They will respond here.
  • 0
    TI__Guru* 80190 points

    Hello,

    user4594142 said:
    （2）VPE by default convert the video to NV12 format. Kmssink only supports NV12 video format。It means to say i must Color space conversion (YUY2->NV12）？？because I capture the video use the Usb Camera
    the format only support YUYV。

    Yes, you must use vpe for CSC for yuy2->nv12 conversion.

    Please check this guide:

    http://processors.wiki.ti.com/index.php/Processor_Training:_Multimedia

    There are examples for CSC by VPE. In chapter Capabilities of IVA-HD, VPE, DSP, and ARM you could find more information regarding gst-vpe.

    user4594142 said:
    can I get the gst-plugin source code

    You could check this guide regarding sources:

    http://processors.wiki.ti.com/index.php/Processor_SDK_Building_The_SDK

    BR
    Margarita

  • 0 in reply to Margarita Gashova
    Prodigy 110 points
    I have to install the SDK-am57xx-evm，now I use the usb3.0 to capture the YUYV video，I want to know how to use the VPE（video process engine） in the C/C++ code ? In the SDK example-application directory，I can't find the related source code。can you give me a simple C/C++ demo about the YUYV->save the yuv file->-H.264 Encode(VPE)->LCD display ,or the GStreamer Command Line source code 。

    The realization of function such as：gst-launch-1.0 -e v4l2src device=/dev/video2 num-buffers=1000 io-mode=4 ! 'video/x-raw, \
    format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1' ! vpe num-input-buffers=8 ! tee name=t ! \
    queue ! ducatih264enc bitrate=4000 ! queue ! h264parse ! qtmux ! filesink location=x.h264 t. ! queue ! kmssink
  • 0 in reply to user4594142
    TI__Guru* 80190 points

    Hello,

    Please check  the guide in my previous post. As I said there is an CSC example which is uses vpe.

    For low level vpe driver you could check here:

    http://processors.wiki.ti.com/index.php/Linux_Core_VPE_User's_Guide

    user4594142 said:
    can't find the related source code。can you give me a simple C/C++ demo about the YUYV->save the yuv file->-H.264 Encode(VPE)->LCD display

    Are you mean gstreamer application? If yes please refer to this tutorials :

    BR
    Margarita

  • 0 in reply to user4594142
    TI__Guru* 80190 points

    Hello,

    user4594142 said:
    gst-launch-1.0 -e v4l2src device=/dev/video2 num-buffers=1000 io-mode=4 ! 'video/x-raw, \
    format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1' ! vpe num-input-buffers=8 ! tee name=t ! \
    queue ! ducatih264enc bitrate=4000 ! queue ! h264parse ! qtmux ! filesink location=x.h264 t. ! queue ! kmssink

    You could also set the caps filter after vpe element.

    Something like:

    .....! 'video/x-raw, format=(string)YUY2, width=(int)1280, height=(int)720, framerate=(fraction)30/1' ! vpe num-input-buffers=8 !  'video/x-raw, format=(string)NV12, width=(int)1280, height=(int)720' ! .......

    BR
    Margarita

  • 0 in reply to Margarita Gashova
    Prodigy 110 points
    Hello,

    Previous description may have errors，not necessarily needed the VPE module to deal with the stream 。In fact ，I want know how to use the IVA-HD subsystem to encode the YUYV ->H.264，so I also need a user guider like Linux_Core_VPE_User's_Guide，or a simple C/C++ demo，can I get it？
  • 0 in reply to user4594142
    TI__Guru* 80190 points

    Hello,

    I am sorry I can not understand your question completely.

    TI h264 encoder expects the input to be in NV12 format. Please refer to h264 encoder user guide (H264_Encoder_HDVICP2_UserGuide.pdf).

    BR
    Margarita