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Re: Green Screen Dancing Edge Pixels (After Effects CS6)

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Mark Whitney
Re: Green Screen Dancing Edge Pixels (After Effects CS6)
on Mar 23, 2018 at 1:49:16 am

[Steve Bentley] "While you do have issues with wrinkles in the screen there has to be a cleaner record of this footage somewhere. And that would help you immensely."

Good catch Steve. Here's a report of this footage vs. Matt's using the MediaInfo utility:

Matt's "Bad Greenscreen:
General
Complete name : D:\AE CS6 Projects\From 2018\Misc Sources\12279_shortgreenscreen.mp4
Format : MPEG-4
Codec ID : M4V (M4V /mp42/isom)
File size : 3.63 MiB
Duration : 6 s 590 ms
Overall bit rate mode : Variable
Overall bit rate : 4 626 kb/s
Encoded date : UTC 2018-03-21 21:30:25
Tagged date : UTC 2018-03-21 21:30:25
TIM : 00:00:00:00
TSC : 24000
TSZ : 1001

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Baseline@L4
Format settings : 2 Ref Frames
Format settings, CABAC : No
Format settings, RefFrames : 2 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 6 s 590 ms
Bit rate : 4 455 kb/s
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 23.976 (24000/1001) FPS
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.090
Stream size : 3.50 MiB (96%)
Language : English
Encoded date : UTC 2018-03-21 21:30:25
Tagged date : UTC 2018-03-21 21:30:25
Color range : Limited

Steves "Good" Greenscreen:
General
Complete name : D:\Ttemp\Toss\12287_171003d0172k.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42 (mp42/mp41)
File size : 87.2 MiB
Duration : 22 s 880 ms
Overall bit rate : 32.0 Mb/s
Encoded date : UTC 2018-02-08 16:16:18
Tagged date : UTC 2018-02-08 16:16:19
TIM : 00:15:18:06
TSC : 25
TSZ : 1

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L4.2
Format settings : CABAC / 2 Ref Frames
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Format settings, GOP : M=4, N=25
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 22 s 880 ms
Bit rate : 32.0 Mb/s
Width : 2 048 pixels
Height : 1 080 pixels
Display aspect ratio : 1.896
Frame rate mode : Constant
Frame rate : 25.000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.578
Stream size : 87.2 MiB (100%)
Language : English
Encoded date : UTC 2018-02-08 16:16:18
Tagged date : UTC 2018-02-08 16:16:18
Color range : Limited
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709
================================================

So ya, either his got re-encoded OR there's something amiss with the camera settings. Note the Bits/Pixel Frame values. Just nothing there.


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