Max Highlight Doprout Problem at DVinfo.net

Nick Fernandez · March 18th, 2007, 09:32 AM

Hi all,

With footage shot and captured on the Sony V1 I am seeing that in some image sections (all have been around the edge of the frame so far), where the whites hit/cross their peaks, that there is some kind of digital dropout in that section of the image? I'll add a link to a video or still for you to look at and compare. I found it in all sorts of images but only contained to the blown out sections of an image.

Let me know if you have seen anything similar.

Nick

Marcus Marchesseault · March 19th, 2007, 04:45 AM

Of course there is no information in highlights. That's just what happens when something goes outside the exposure range of any digital camera. Pure black clips at 0,0,0 and pure white clips at 255,255,255 and there will be nothing but pure white or black in areas out of the camera's range. All camera mediums, CMOS, CCD, and even film have exposure ranges.

Nick Fernandez · March 21st, 2007, 03:59 AM

HI there,

I guess I need to put a clip up as I am not explaining myself properly... I am not talking about just maxing into the white with no info, but the video aactually generating nasty glitchy video dropouts in the highlight... looks like blue glitchy pixelation that remains thought out the shot but kind of changings form to fill the hottest parts of the image... ahh, guess I just need to get a clip up...

Thanks, Nick

Marcus Marchesseault · March 21st, 2007, 06:06 AM

That sounds weird. Definitely post some footage.

Don't be mad at me for asking, but I want to make sure you aren't talking about something like zebra bars. This does show up on tape, right?

Brian Standing · March 21st, 2007, 10:52 AM

Can't speak for the V1, but on any of the three Sony DV cameras I've ever used (PD-150, VX1000, DSR-DC35) zebra bars NEVER get recorded to tape.

Marcus Marchesseault · March 21st, 2007, 02:34 PM

Yeah, I just wanted to make sure that this was a problem that is getting recorded and not just zebra bars or peaking indicator.

Nick Fernandez · March 23rd, 2007, 04:09 AM

Hey,

Don't mind a silly question asked with humility! No, this is looking at captured footage and I never have the peaking indication on - it is also inconsistent unlike the indicators. I did an export to upload and the artifacting disappeared at DV res. So I guess I need to make an m2t. One other thing (that I should know after working in web streaming for a year) how are you guys posting clips?

Nick

Tony Tremble · March 23rd, 2007, 04:44 AM

Nick use rapidshare.com

It's free!

TT

Marcus Marchesseault · March 23rd, 2007, 07:17 AM

I have an idea.

How are you watching the footage? Since it didn't seem to happen on captured footage, maybe the V1 is going outside the range of your TV. Since the V1 can probably capture up to 110IRE, it may be something between your devices. Computers don't care about IRE levels.

Eric Johannes · March 23rd, 2007, 07:29 AM

Not sure if your problem is the same as mine...but I am getting MAJOR dropouts(digital pixelation) on ALL of my tapes.

I have found it most prevelent when I move the camera rapidly, or go from one extreme to the other, ie, pan from a blue sky to a building...then the first few frames of the building will have rectangular pixels of blue sky implanted in them...

I am working with sony to diagnose and solve this....thus far they have no answers for me...

But I assure you, it IS happening and it IS NOT a minor thing...

Nick Fernandez · March 23rd, 2007, 11:37 AM

Hey there,

I tried to output a sample for you guys to see but it disappears when I export the video (even using "current settings" on HDV). I then tried opening in Quicktime and its not there. I tried re capturing the same footage - visible in FCP and not quicktime. SO it is only visible in FCP on my monitors. I dont have broadcast monitor here but I guess I need to get onto one to see if it is going to persist and cause probs. Maybe I'll just see if it ends up a problem in the edit then troubleshoot.

Any ideas on this?

Nick

March 18th, 2007, 09:32 AM	#1
Nick Fernandez New Boot Join Date: Mar 2007 Location: london Posts: 20	Max Highlight Doprout Problem Hi all, With footage shot and captured on the Sony V1 I am seeing that in some image sections (all have been around the edge of the frame so far), where the whites hit/cross their peaks, that there is some kind of digital dropout in that section of the image? I'll add a link to a video or still for you to look at and compare. I found it in all sorts of images but only contained to the blown out sections of an image. Let me know if you have seen anything similar. Nick

March 21st, 2007, 03:59 AM	#3
Nick Fernandez New Boot Join Date: Mar 2007 Location: london Posts: 20	Digital Dropout HI there, I guess I need to put a clip up as I am not explaining myself properly... I am not talking about just maxing into the white with no info, but the video aactually generating nasty glitchy video dropouts in the highlight... looks like blue glitchy pixelation that remains thought out the shot but kind of changings form to fill the hottest parts of the image... ahh, guess I just need to get a clip up... Thanks, Nick

March 23rd, 2007, 04:09 AM	#7
Nick Fernandez New Boot Join Date: Mar 2007 Location: london Posts: 20	Footage Hey, Don't mind a silly question asked with humility! No, this is looking at captured footage and I never have the peaking indication on - it is also inconsistent unlike the indicators. I did an export to upload and the artifacting disappeared at DV res. So I guess I need to make an m2t. One other thing (that I should know after working in web streaming for a year) how are you guys posting clips? Nick

March 23rd, 2007, 11:37 AM	#11
Nick Fernandez New Boot Join Date: Mar 2007 Location: london Posts: 20	More strange Hey there, I tried to output a sample for you guys to see but it disappears when I export the video (even using "current settings" on HDV). I then tried opening in Quicktime and its not there. I tried re capturing the same footage - visible in FCP and not quicktime. SO it is only visible in FCP on my monitors. I dont have broadcast monitor here but I guess I need to get onto one to see if it is going to persist and cause probs. Maybe I'll just see if it ends up a problem in the edit then troubleshoot. Any ideas on this? Nick

March 19th, 2007, 04:45 AM	#2
Marcus Marchesseault Trustee Join Date: Nov 2005 Location: Honolulu, HI Posts: 1,961	Of course there is no information in highlights. That's just what happens when something goes outside the exposure range of any digital camera. Pure black clips at 0,0,0 and pure white clips at 255,255,255 and there will be nothing but pure white or black in areas out of the camera's range. All camera mediums, CMOS, CCD, and even film have exposure ranges.

March 21st, 2007, 06:06 AM	#4
Marcus Marchesseault Trustee Join Date: Nov 2005 Location: Honolulu, HI Posts: 1,961	That sounds weird. Definitely post some footage. Don't be mad at me for asking, but I want to make sure you aren't talking about something like zebra bars. This does show up on tape, right?

March 21st, 2007, 10:52 AM	#5
Brian Standing Major Player Join Date: Dec 2003 Location: Madison, Wisconsin Posts: 621	Can't speak for the V1, but on any of the three Sony DV cameras I've ever used (PD-150, VX1000, DSR-DC35) zebra bars NEVER get recorded to tape.

March 21st, 2007, 02:34 PM	#6
Marcus Marchesseault Trustee Join Date: Nov 2005 Location: Honolulu, HI Posts: 1,961	Yeah, I just wanted to make sure that this was a problem that is getting recorded and not just zebra bars or peaking indicator.

March 23rd, 2007, 04:44 AM	#8
Tony Tremble Regular Crew Join Date: Oct 2006 Location: United Kingdom Posts: 451	Nick use rapidshare.com It's free! TT

March 23rd, 2007, 07:17 AM	#9
Marcus Marchesseault Trustee Join Date: Nov 2005 Location: Honolulu, HI Posts: 1,961	I have an idea. How are you watching the footage? Since it didn't seem to happen on captured footage, maybe the V1 is going outside the range of your TV. Since the V1 can probably capture up to 110IRE, it may be something between your devices. Computers don't care about IRE levels.

March 23rd, 2007, 07:29 AM	#10
Eric Johannes New Boot Join Date: Dec 2006 Location: St. Paul, MN Posts: 11	Not sure if your problem is the same as mine...but I am getting MAJOR dropouts(digital pixelation) on ALL of my tapes. I have found it most prevelent when I move the camera rapidly, or go from one extreme to the other, ie, pan from a blue sky to a building...then the first few frames of the building will have rectangular pixels of blue sky implanted in them... I am working with sony to diagnose and solve this....thus far they have no answers for me... But I assure you, it IS happening and it IS NOT a minor thing...