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Freeze frame with frame buffer

Altera_Forum
Honored Contributor II
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Hi,  

I'm using frame buffer to freeze, that is clearing the GO bit of the writer of frame buffer, and it turned out clean, and I released the freeze(setting the GO bit), the screen returned to normal without flickering. The dataflow is like this, CVI->FB->CVO. 

But when I used the dataflow which I have uploaded as the attachment, the freeze turned out to be fine, but when I released the frame buffer(setting GO bit), I noticed the screen just flickered a little and returned to normal. 

So can someone give me a hint on this ? Is it not appropriate to freeze frame with frame buffer? Thanks a lot!
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Altera_Forum
Honored Contributor II
257 Views

sorry, because of some network problem, I will upload the dataflow soon later

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Altera_Forum
Honored Contributor II
257 Views

Hi, 

 

Make sure you tick the check box "discard invalid frames/fields" in the vfb. 

Otherwise, the incomplete frame stuck between the CVI and the VFB during the freeze will be propagated when you restart the frame buffer and the output will glitch.
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Altera_Forum
Honored Contributor II
257 Views

 

--- Quote Start ---  

Hi, 

 

Make sure you tick the check box "discard invalid frames/fields" in the vfb. 

Otherwise, the incomplete frame stuck between the CVI and the VFB during the freeze will be propagated when you restart the frame buffer and the output will glitch. 

--- Quote End ---  

 

 

Hi, vgs 

 

Thx for your reply. Yes, I have ticked the check box "discard invalid frames/fileds" in the vfb. But it still flickered. I am out right now, I will upload some snaps of my configuration later. Thx again for help.
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