How to take picture？

Demon

Prodigy 220 points

Hi, everybody:

I'm using DM816X,and DVR_RDK4.0.How can I use the demos to take picture?

Thanks!!!

over 12 years ago

0 Badri Narayanan over 12 years ago

TI__Guru 59700 points

What do you want to take a picture of.Do you want a snapshot of what is displayed or what is captured from the camera ? What is theusecase you are using

0 Demon over 12 years ago in reply to Badri Narayanan

Prodigy 220 points

Hi Badri:

Thanks for you replay. I want a snapshot.I use the demo_vcap_venc_vdec_disp. Can you please introduces the process of snapshot to me?

Thanks.

0 Badri Narayanan over 12 years ago in reply to Demon

TI__Guru 59700 points

You can use Venc_snapshotDump and Venc_getBitstreamBuffer to get capture frame snapshot as JPEG image.

Refer these posts for details:

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/717/p/270659/945629.aspx#945629

http://e2e.ti.com/support/dsp/davinci_digital_media_processors/f/716/t/217401.aspx

0 Demon over 12 years ago in reply to Badri Narayanan

Prodigy 220 points

Hi Badri:

Thanks for you replay.

Now I can get capture frame snapshot as JPEG image.But when I cast the Venc_snapshotDump,it works well.Then what the function of Venc_snapshotDump ?

Thanks.

0 Badri Narayanan over 12 years ago in reply to Demon

TI__Guru 59700 points

You mean even if you don't invoke Venc_snapshotDump you still get the JPEG snapshot? By default JPEG will be output at 1 fps for a channel. SO getting the JPEG snapshot may get delayed by upto 1 second. Invoking Venc_snapshotDump ensures the immediate next frame is encoded as JPEG and there is not large delay in getting the snapshot.

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How to take picture？