avhcd compression or lack there of? at DVinfo.net

Brian W. Smith · December 11th, 2007, 08:03 PM

http://www.stage6.com/user/bas_vp/vi...le-Splice-Test

So my video, which I ran for 56 minutes, and got about 18 minutes per segment, which was at least 75% pitch black, still didn't compress further to say 30 minutes per segment?

Where can I learn about why this isn't happening with avhcd?

Dave Blackhurst · December 11th, 2007, 11:05 PM

AVCHD is ALREADY a compressed format, and supposedly pretty well optimized... you're not going to "re-compress" beyond a point. Even though in theory it should take less space to say "the whole frame is pitch black", there's still probably overhead that limits how much it can compress and still maintain the data stream as intended.

December 11th, 2007, 08:03 PM	#1
Brian W. Smith Regular Crew Join Date: Dec 2007 Location: Washington, DC Posts: 66	avhcd compression or lack there of? http://www.stage6.com/user/bas_vp/vi...le-Splice-Test So my video, which I ran for 56 minutes, and got about 18 minutes per segment, which was at least 75% pitch black, still didn't compress further to say 30 minutes per segment? Where can I learn about why this isn't happening with avhcd?

December 11th, 2007, 11:05 PM	#2
Dave Blackhurst Inner Circle Join Date: Feb 2007 Location: Apple Valley CA Posts: 4,874	AVCHD is ALREADY a compressed format, and supposedly pretty well optimized... you're not going to "re-compress" beyond a point. Even though in theory it should take less space to say "the whole frame is pitch black", there's still probably overhead that limits how much it can compress and still maintain the data stream as intended.