Linux/AM5728: gstreamer capture issue from adv7180

Ilya Kravchuk

Part Number: AM5728

Tool/software: Linux

I'm trying to capture video flow from analog cam, connected to adv7180 on customboard, based on sitara am578 processor.

After Linux boots up, /dev/video1 capture device successfully creates. I've checked it by yavta -c100 -fYUYV -Fvout_test.yuv -s720x576 /dev/video1.
Output file is played correctly by ffplay -f rawvideo -pix_fmt yuyv422 -video_size 720x576 -framerate 25 -i vout_test.yuv.yuv from Ubuntu.

But when I'm trying to capture it via gst-launch-1.0 v4l2src device=/dev/video1 ! videoconvert ! avimux ! filesink location=new.avi, pipeline change it states сonsistently to the PLAYING, but when I press ctrl+c it changes state to the READY and doesn't stops. If I press ctrl+c again, it terminates and result file becomes empty.
How can I fix this problem?

over 9 years ago

0 Margarita Gashova over 9 years ago

TI__Guru* 80190 points

Hello,

Please check this wiki page for examples :
processors.wiki.ti.com/.../Processor_Training:_Multimedia
What is the use case?
Is it capture->encode->mux->save in file?

BR
Margarita

0 Ilya Kravchuk over 9 years ago in reply to Margarita Gashova

Expert 1520 points

Thanks a lot, but I've already seen this gst pipelines guide, and it doesn't work for my capture device.
I need in the following use cases:
1. Capture->deinterlacing->encode->mux->save in file
2. Capture->output to the kmssink (my output device is analog monitor, connected to the adv7391 video encoder).

Captured data is interlaced video stream, passing to separate v4l2 buffers in temporal order: V4L2_FIELD_ALTERNATE

0 Margarita Gashova over 9 years ago in reply to Ilya Kravchuk

TI__Guru* 80190 points

Hello,

Could you check in the guide for examples and try some of them capture->encode->save in file or capture->display like:

gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=1000 io-mode=4 ! 'video/x-raw, \
format=(string)YUY2, width=(int)1280, height=(int)720' ! vpe num-input-buffers=8 ! queue ! kmssink

or

gst-launch-1.0 -e v4l2src device=/dev/video1 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 ! \
queue ! ducatimpeg4enc bitrate=4000 ! queue ! mpeg4videoparse ! qtmux ! filesink location=x.mp4

In this cases you could change the format, resolution etc. in the caps filter depending of your use case.

The gst VPE element could be use for deinterlacing. In additional, you can set kmssink property for connector(kmssink scale=false connector=30).

Hope this helps.

BR
Margarita

0 Ilya Kravchuk over 9 years ago in reply to Margarita Gashova

Expert 1520 points

Thanks for your reply.
I've already tried this pipelines, and it causes all the same result: pipelines doesn't change states to the NULL from READY.

0 Margarita Gashova over 9 years ago in reply to Ilya Kravchuk

TI__Guru* 80190 points

Hello,

Could you try:
gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=300 ! fakesink silent=false

Could you post the gst debug log also?

0 Ilya Kravchuk over 9 years ago in reply to Margarita Gashova

Expert 1520 points

Attaching debug log for above pipeline, executed with -d flag and debug-level=2

2287.gst-log.txt

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Linux/AM5728: gstreamer capture issue from adv7180