Linux/AM5728: gstreamer video deinterlacing

Ilya Kravchuk

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

over 8 years ago

0 Margarita Gashova over 8 years ago

TI__Guru* 80190 points

Hello,

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

BR
Margarita

0 Ilya Kravchuk over 8 years ago 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 Margarita Gashova over 8 years ago

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 Ilya Kravchuk over 8 years ago 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 Margarita Gashova over 8 years ago 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 Ilya Kravchuk over 8 years ago 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 Margarita Gashova over 8 years ago in reply to Ilya Kravchuk

TI__Guru* 80190 points

Hello,

Could you share the video?

BR
Margarita

0 Ilya Kravchuk over 8 years ago in reply to Margarita Gashova

Expert 1520 points

Yes, of course.
1323.cap.tar.gz

0 Margarita Gashova over 8 years ago 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 Ilya Kravchuk over 8 years ago in reply to Margarita Gashova

Expert 1520 points

Thank you very much

0 Margarita Gashova over 8 years ago 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

Margarita

0 Ilya Kravchuk over 8 years ago 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 Ilya Kravchuk over 8 years ago in reply to Ilya Kravchuk

Expert 1520 points

As I understand, vpe plugin for gstreamer doesn't support deinterlacing?

0 Margarita Gashova over 8 years ago 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

Processors

Processors forum

Linux/AM5728: gstreamer video deinterlacing