Blackmagic intensity 4k - missing scenes!

[hdfills]

hello all i have a blackmagic intensity 4k capture card that i have in my capture setup ... i am getting the screen flashing black when ever there is any colours of purple on the screen while capturing .... and only with that colour , my captures are 100% fine all other times but as soon as bright purple is on the screen the issues start

i know its an odd one but does anyone have any ideas please !

[lordsmurf]

What conditions? Analog capture? If so, probably standard lack of TBC.

More details needed on all equipment, task being attempted.

[dellsam34]

Sounds like one the primary colors is clipping, can you describe your capture workflow, like capture source, cables used (component, S-Video ...) software used, Don't expect help with a vague question, members are not going to make an effort to guess what is the question before answering it.

[hdfills]

JVC SVHS DECK > PANASONIC ES10 > KEY DIGITAL KD-VP8 > BLACK MAGIC INTENSITY PRO 4K

Like i say i have no issues at all untill purple is on the screen :/

[oln]

What are you connecting the devices together with?

[hdfills]

What conditions? Analog capture? If so, probably standard lack of TBC.

More details needed on all equipment, task being attempted.

yes, Analog capture - no issues at all, untill purple colours on the screen and thats the same everytime with all devices - sony hi8 player and jvc minidv deck aswell as the svhs vhs player

[oln]

What cables are you using between the ES10 and Key DIgital, and between the Key digital and Blackmagic? It may be worth trying to try using component instead of s-video, or s-video instead of component, whichever you are using, and also HDMI from Key digital to blackmagic if you aren't already.

[dellsam34]

You can do some easy diagnostic steps to single out the faulty component, Try one device at a time and report back.

[hdfills]

i will order new leads for everthing and see how it goes

[hdfills]

upgraded to better quality phono video cables and the issue is sorted - so thank you all for your help and the image seems alot better aswell

[dellsam34]

For best results your cables should be as follows:
- JVC to Panasonic -> S-Video cable
- Panasonic to KD -> S-Video Cable
- KD to BM -> HDMI cable

You should not need any RCA (Phono) cables.

[hdfills]

For best results your cables should be as follows:
- JVC to Panasonic -> S-Video cable
- Panasonic to KD -> S-Video Cable
- KD to BM -> HDMI cable

You should not need any RCA (Phono) cables.

ok

[hdfills]

well the issue came back so i removed the KEY DIGITAL KD-VP8 and all is perfect now .... tested all the same footage and not one drop out

[dellsam34]

K Digital has some buttons for video settings, maybe you're clipping the values. That's the reason why video scalers are not suitable for capturing, HDMI is a display port and is no meant to be a digital port to capture video from.