|
08-04-2017, 09:05 AM
|
|
Premium Member
|
|
Join Date: Feb 2016
Location: Perth, Australia
Posts: 453
Thanked 3 Times in 2 Posts
|
|
When I run the attached sample through QTGMC, I get this:
Frame1.png
| You must be logged in to view this content; either login or register for the forum. The attached screen shots, before/after images, photos and graphics are created/posted for the benefit of site members. And you are invited to join our digital media community. |
What's going on here? I'd expect the flash to occur on the whole screen at the same time.
|
|
Someday, 12:01 PM
|
|
Ads / Sponsors
|
|
Join Date: ∞
Posts: 42
Thanks: ∞
Thanked 42 Times in 42 Posts
|
|
|
|
|
08-05-2017, 02:32 PM
|
|
Premium Member
|
|
Join Date: Aug 2009
Location: N. Carolina and NY, USA
Posts: 3,648
Thanked 1,308 Times in 982 Posts
|
|
Quote:
Originally Posted by koberulz
What's going on here? I'd expect the flash to occur on the whole screen at the same time.
|
Apparently the flash duration isn't sync'd with the camera's shutter. Does it matter? During play you can't see the difference.
That happens in the two fields of frame 3 of the sample. How about frame 4? The upper area of the top field in frame 4 is blacked out (white arrow):
How about frame 5? Both the top and bottom field of frame 5 have an orange blob (white arrow). Is this an effect of local lighting?
top field:
bottom field:
The color and exposure are atrocious. Another bad tape. I don't envy you.
|
|
08-05-2017, 03:03 PM
|
|
Premium Member
|
|
Join Date: Feb 2016
Location: Perth, Australia
Posts: 453
Thanked 3 Times in 2 Posts
|
|
Quote:
Originally Posted by sanlyn
Apparently the flash duration isn't sync'd with the camera's shutter. Does it matter? During play you can't see the difference.
|
If you don't think it matters, probably not. I just wasn't sure what it was, or whether it was indicative of some sort of issue.
The dark purple artifacts pop up around motion pretty much constantly in most of these tapes. They would've all been the exact same process - same team, same venue, same season - so consistent quality (or lack thereof) is to be expected.
|
|
08-10-2017, 05:48 PM
|
|
Site Staff | Video
|
|
Join Date: Dec 2002
Posts: 13,633
Thanked 2,458 Times in 2,090 Posts
|
|
|
It's just camera flash sync. Any camera or video camera, not using the flash, will experience this.
The color of the flash varies due to temperature and reflections.
Based on that brief sample, I actually don't find the tape to be bad quality at all. Just some standard chroma noise, chroma shifting, chroma blooming.
This is expected behavior of a flash, and nothing to worry about. But, FYI, this is why flash photography is often forbidden at events and places. For example, you don't want your wedding video ruined by Aunt Mabel and her $100 POS camera. Or to get with the times, ruined by cell phones.
|
All times are GMT -5. The time now is 07:08 PM
|
