DM3730 isp capture frame order

Dmitry Bodnya

Other Parts Discussed in Thread: DM3730

Hi!

I have a board SBC8140 with DM3730 onboard and OV2656 sensor connected to it. The board originally was shipped with Angstrom kernel v 2.6.32. I tried to capture video from sensor on that kernel and it was ok.

No I moved to linux 2.6.37-psp04.02.00.07.sdk. After some time spent to porting I tried video capture on this kernel. And here I got a problem. Video frames received by isp are comes to userspace in strange order. The moving of objects in frame is "jumping" forward and back. I can see it both in encode or loopback programs.

I am attaching sample video. It can be seen by VLC.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/791/vid.h264.7z

Is it a known problem?

over 10 years ago

0 Dmitry Bodnya over 10 years ago

Expert 1140 points

Hi.

I don't know how it's possible but it was due to wrong sensor settings..

Now frames are in right order, but I have noise on picture. Maybe it's still due settings...

0 Dmitry Bodnya over 10 years ago in reply to Dmitry Bodnya

Expert 1140 points

No. The problem is still actual.

The problem moved when sensor output was bigger then isp except. But when sensor has correct resolution picture is still has "jitter".

0 Dmitry Bodnya over 10 years ago in reply to Dmitry Bodnya

Expert 1140 points

I looked record in slow motion and it looks like every 2 frames are swapped.

Anybody can help me?

0 Cvetolin Shulev-XID over 10 years ago

TI__Guru 65405 points

Hi Dmitry,

Could you share whether the issue appears only with interlaced videos or with with non-interlaced too?

BR
Tsvetolin Shulev

0 Dmitry Bodnya over 10 years ago in reply to Cvetolin Shulev-XID

Expert 1140 points

Hi!

I only checked this with ov2656 and it gives only progressive video frames.

The fact is that the hardware is working - on 2.6.32 kernel it works ok.

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DM3730 isp capture frame order