Posts Tagged ‘video’

Snow Leopard to change default gamma…

From the release notes of the beta of Mac OS 10.6 (“Snow Leopard”):

Default Gamma Changes

To better meet the needs of digital content producers and consumers, the default display gamma has been changed from 1.8 to 2.2 in Snow Leopard.

This will be a welcome change to anyone who has run into cross-platform issues with gamma.

Posted: January 20th, 2009
Categories: News
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Safe Areas…

The following table lists safe areas for different aspect ratios.

Aspect ratio Horizontal action safe Vertical action safe Horizontal title safe Vertical title safe
16:9 3.5% from edge 3.5% from edge 5% from edge 5% from edge
16:9 protected for 4:3 (4:3 center cut-out) 15.13% from edge 3.5% from edge 16.25% from edge 5% from edge
4:3 protected for 16:9 (16:9 center cut-out) 3.5% from edge 15.13% from edge 5% from edge 16.25% from edge
1:1.85 3.5% from edge 3.5% from edge 5% from edge 5% from edge
1:1.85 protected for 4:3 (4:3 center cut-out) 16.57% from edge 16.57% from edge 17.65% from edge 5% from edge
1:1.85 protected for 16:9 (16:9 center cut-out) 5.3% from edge 5.3% from edge 6.7% from edge 5% from edge

(Excerpted from Fix It In Post)

Posted: October 15th, 2008
Categories: News
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Standard Video Characteristics…

The following table lists key characteristics of popular analogue and digital video formats. Figures shown are the maximum supported by the format specification in each case.

Format Frame rate Field order Color sampling Bandwidth Compression Precision
Digital Betacam (NTSC) 29.97 Upper first 4:2:2 90 Mb/s 2.31:1 10-bit
Digital Betacam (PAL) 25 Upper first 4:2:2 90 Mb/s 2.31:1 10-bit
D1 (NTSC) 29.97 Lower first 4:2:2 270 Mb/s 1:1 8-bit
D1 (PAL) 25 Lower first 4:2:2 270 Mb/s 1:1 8-bit
Digital8 (NTSC) 29.97 Lower first 4:1:1 25 Mb/s 5:1 8-bit
Digital8 (PAL) 25 Lower first 4:2:0 25 Mb/s 5:1 8-bit
DV-SP (NTSC) 29.97 Lower first 4:1:1 25 Mb/s 5:1 8-bit
DV-SP (PAL) 25 Lower first 4:2:0 25 Mb/s 5:1 8-bit
DVCAM (NTSC) 29.97 Lower first 4:1:1 25 Mb/s 5:1 8-bit
DVCAM (PAL) 25 Lower first 4:2:0 25 Mb/s 5:1 8-bit
DVCPRO (NTSC) 29.97 Lower first 4:1:1 25 Mb/s 5:1 8-bit
DVCPRO (PAL) 25 Lower first 4:1:1 25 Mb/s 5:1 8-bit
DVCPRO 50 29.97 Lower first 4:2:2 50 Mb/s 3.3:1 8-bit
DVCPRO-P 30p n/a 4:2:0 50 Mb/s 5:1 8-bit
DVD (NTSC) 29.97 Upper first 4:2:0 9.8 Mb/s 22:1 (MPEG-2) 8-bit
DVD (PAL) 25 Upper first 4:2:0 9.8 Mb/s 22:1 (MPEG-2) 8-bit
Betacam SX (NTSC) 29.97 Upper first 4:2:2 18 Mb/s 10:1 (MPEG-2) 8-bit
Betacam SX (PAL) 25 Upper first 4:2:2 18 Mb/s 10:1 (MPEG-2) 8-bit
HDV @720p 25p, 30p n/a 4:2:0 25 Mb/s 22.5:1 (MPEG-2) 8-bit
HDV @1080i 25, 30 Upper first 4:2:0 25 Mb/s 22.5:1 (MPEG-2) 8-bit
DVCProHD-100 25, 29.97, 29.97p, 30, 30p Lower first 4:2:2 100 Mb/s 6.7:1 8-bit
HDD5 23.98p, 24p, 25, 25p, 29.97, 29.97p, 30, 30p Upper first 4:2:2 250 Mb/s 4:1 (8-bit), 5:1 (10-bit) 8-bit, 10-bit
HDCAM 23.98p, 24p, 25, 25p, 29.97, 29.97p, 30, 30p Upper first 3:1:1 143 Mb/s 7.1:1 8-bit
HDCAM SR 23.98p, 24p, 25, 25p, 29.97, 29.97p, 30, 30p Upper first 4:4:4, 4:4:4 (log), 4:2:2 880 Mb/s (4:4:4), 440 Mb/s (4:2:2) 4.2:1 (MPEG-4, 4:4:4), 2.7:1 (MPEG-4, 4:2:2) 10-bit
Blu-ray 23.98p, 24p, 25, 25p, 29.97, 29.97p, 30, 30p Upper first 4:2:0 40 Mb/s 25:1 8-bit
Posted: October 15th, 2008
Categories: Articles
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Vimeo is YouTube for HD…

YouTube is an awful website. It’s low-rez, the compression is horrendous, and the interface is badly designed. However, it’s popularity is undeniable.

Website Vimeo… seems to offer all the features of YouTube but with improved resolution and picture quality, ideal for anyone with HD footage to show off.

There are a couple of catches: “HD” is limited to 720p (1280×720 pixels) and you can only upload 500MB of video per week.


Gone in a Flash – HD from Chris Crutchfield on Vimeo.

Posted: May 12th, 2008
Categories: Tools
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