Linux/AM5728: Video recording on EVM

Hiren Gohel

Part Number: AM5728

Tool/software: Linux

Hello Gurus,

I am using AM5728 EVM kit and i am new to it. I am new to sitara processor.

I have booted the linux, now i want to record a video using a usb camera. I got some code through which i was able to capture pictures in different formats.

But i am not able to record a video even not able start live streaming. Please guide me i am very new to this u can say fresher.

Thanks in advance

Regards,

Hiren Gohel

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

The software team have been notified. They will respond here.

0 Margarita Gashova over 7 years ago

TI__Guru* 80190 points

Hello,

Please check this guide(Capture and Encode into a MP4 file.):
processors.wiki.ti.com/.../Processor_Training:_Multimedia

Hope this helps.

BR
Margarita

0 Hiren Gohel over 7 years ago in reply to Margarita Gashova

Prodigy 150 points

Hello Margrita,

Thanks for reply.

I have read the multimedia guide still i have many doubts regarding how to create pipeline?.

Basically i wanted to record a video, but at initial i am trying to just open my camera device and it should show at lcd screen.

I have connected a usb camera to evm to /dev/video1 and i have been trying few gstream commands like mention below,

i ran this command after stopping the weston.

gst-launch-1.0 v4l2src device=/dev/video1 waylandsink  --> for this command the lcd just blinks one time

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   --> for this it is giving internal data flow error



Thanks in advance.

Regards,
Hiren Gohel

0 Margarita Gashova over 7 years ago in reply to Hiren Gohel

TI__Guru* 80190 points

Hello,

Gstreamer is a multimedia framework which is linking component. The elements/components must be separate by pipe (!).

Waylandsink and kmssink are elements for display.

1. Case of waylandsink:

Hiren Gohel said:
gst-launch-1.0 v4l2src device=/dev/video1 waylandsink --> for this command the lcd just blinks one time

This pipeline is wrong some elements are missing and the ! is missing also. In this case weston should be running also.

Here is the command for running weston:

/etc/init.d/weston start

Here is examples. The both pipelines demonstrate capture->display:

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 ! waylandsink

gst-launch-1.0 v4l2src device=/dev/video1 num-buffers=1000 io-mode=4 ! 'video/x-raw, format=(string)NV12, width=(int)1280, height=(int)720' ! waylandsink use-drm=true

2. Case of kmssink:

Hiren Gohel said:
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 --> for this it is giving internal data flow error

The pipeline is correct but you should stop weston by this command:

/etc/init.d/weston stop

The reason for internal data flow error could be wrong caps filter for example(in case -4).

The capsfilter should be change depending of what video source provides like resolution, format, etc.

BR
Margarita

0 Margarita Gashova over 7 years ago in reply to Margarita Gashova

TI__Guru* 80190 points

Hello,

Please if previous answer helps you to solved your issue verify the answer (This resolved my issue button).
If no, let me know the results of the tests on your side

Thank you!
Best regards,
Margarita

0 Hiren Gohel over 7 years ago in reply to Margarita Gashova

Prodigy 150 points

Thank You for your reply my issue is resolved.

Processors

Processors forum

Linux/AM5728: Video recording on EVM