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Linux/AM5728: gstreamer video deinterlacing

Ilya Kravchuk
Expert 1520 points
Part Number: AM5728

Tool/software: Linux

I'm trying to deinterlace raw YUV video flow, captured from analog cam on my board, based on sitara AM5728 processor.

For capture I use this pipeline:
  gst-launch-1.0 v4l2src device=/dev/video1 ! videoconvert ! filesink location=new.yuv

Output file correctly parses and deinterlases with ffmpeg:
  ffplay -f rawvideo -pix_fmt uyvy422 -video_size 720x288 -framerate 50 -vf tinterlace=mode=0 new.yuv

But I can't build correct pipeline  for this goal by gst-launch. I'm trying to use this pipeline, but output stream isn't deinterlaced:
  gst-launch-1.0 -v filesrc location=cap.yuv ! videoparse width=720 height=576 framerate=24/1 interlaced=true format=2 ! deinterlace ! autovideosink

Can anybody help me to solve this problem.
I'm attaching resulting output of above pipeline 


  • 0
    TI__Guru* 80190 points
    Hello,

    Where you are executing the above pipeline on board or PC?


    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Expert 1520 points
    I'm executing it on both machines, PC needs only for convenient way of taking screenshot of result
  • 0
    TI__Guru* 80190 points

    Hello,

    It seems that you are playing the video on PC(autovideosink element).
    You could try this pipeline:

    gst-launch-1.0 filesrc location=interlaced.uyuv ! videoparse width=1280 height=720 format=uyvy ! videoconvert ! autovideosink

    Change the resolution and format if it is require.

    The result that you are seeing seems like format problem.
    I can not understand the videoconvert element in your capture pipeline(set the capsfilter in the capture pipeline).

    BR
    Margarita

  • 0 in reply to Margarita Gashova
    Expert 1520 points

    Thank you very much for fast reply. Yes, capture format was uncorrect, I've set correct filters for both pipelines, but result video flow is still outputs in interlaced mode:

    gst-launch-1.0 -v v4l2src device=/dev/video1 ! video/x-raw,format=UYVY,width=720,height=576,framerate=25/1 ! filesink location=new.yuv
    gst-launch-1.0 filesrc location=new.yuv ! videoparse width=720 height=576 format=uyvy ! videoconvert ! autovideosink

  • 0 in reply to Ilya Kravchuk
    TI__Guru* 80190 points
    Hello,

    The "double" frame that you are seeing is the result of the interlaced video.
    Please, try to add the deinterlace element in the pipeline for read from file->display.
    You could check here for more information regarding deinterlace element. There is example also:
    gstreamer.freedesktop.org/.../gst-plugins-good-plugins-deinterlace.html

    Let me know the result.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Expert 1520 points

    After invocation of above pipeline, it's all the same result: picture is divided on two parts: part of bottom and part of top fields.

    gst-launch-1.0 -v filesrc location=cap.yuv ! videoparse width=720 height=576 format=uyvy interlaced=true ! deinterlace ! videoconvert ! autovideosink
    Setting pipeline to PAUSED ...
    Pipeline is PREROLLING ...
    /GstPipeline:pipeline0/GstVideoParse:videoparse0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)UYVY\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)interleaved\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)jpeg\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)25/1"
    /GstPipeline:pipeline0/GstDeinterlace:deinterlace0.GstPad:src: caps = "video/x-raw\,\ format\=\(string\)UYVY\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)jpeg\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)50/1"
    /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:src: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ framerate\=\(fraction\)50/1\,\ format\=\(string\)YV12"
    /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink.GstProxyPad:proxypad0: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ framerate\=\(fraction\)50/1\,\ format\=\(string\)YV12"
    /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0/GstXvImageSink:autovideosink0-actual-sink-xvimage.GstPad:sink: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ framerate\=\(fraction\)50/1\,\ format\=\(string\)YV12"
    /GstPipeline:pipeline0/GstAutoVideoSink:autovideosink0.GstGhostPad:sink: caps = "video/x-raw\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ framerate\=\(fraction\)50/1\,\ format\=\(string\)YV12"
    /GstPipeline:pipeline0/GstVideoConvert:videoconvert0.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)UYVY\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)progressive\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)jpeg\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)50/1"
    /GstPipeline:pipeline0/GstDeinterlace:deinterlace0.GstPad:sink: caps = "video/x-raw\,\ format\=\(string\)UYVY\,\ width\=\(int\)720\,\ height\=\(int\)576\,\ interlace-mode\=\(string\)interleaved\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\ chroma-site\=\(string\)jpeg\,\ colorimetry\=\(string\)bt601\,\ framerate\=\(fraction\)25/1"
    Pipeline is PREROLLED ...
    Setting pipeline to PLAYING ...



  • 0 in reply to Ilya Kravchuk
    TI__Guru* 80190 points
    Hello,

    Could you share the video?

    BR
    Margarita
  • 0 in reply to Ilya Kravchuk
    TI__Guru* 80190 points
    Hello,

    Thank you! I will check it and I will get back to you.

    BR
    Margarita
  • 0 in reply to Margarita Gashova
    Expert 1520 points
    Thank you very much
  • 0 in reply to Ilya Kravchuk
    TI__Guru* 80190 points

    Hello,

    Please try this pipeline it is working for me:

    gst-launch-1.0 filesrc location=captured.yuv ! videoparse width=720 height=288 format=uyvy ! videoconvert ! autovideosink

    BR

    Margarita

  • 0 in reply to Margarita Gashova
    Expert 1520 points

    Yes, I understand that it's very simple decision, but throwing out all even or odd fields is unacceptable.

  • 0 in reply to Ilya Kravchuk
    Expert 1520 points
    As I understand, vpe plugin for gstreamer doesn't support deinterlacing?
  • 0 in reply to Ilya Kravchuk
    TI__Guru* 80190 points
    Hello,

    Please check this guide :
    processors.wiki.ti.com/.../Processor_Training:_Multimedia
    With gst-inspect-1.0 vpe you could check the supported formats.

    BR
    Margarita