Creative COW

SIGN IN & SETTINGS :: SPONSORS :: ABOUT US :: CONTACT US

FORUMS:

list (w/ descriptions)

H.264 compression ratio


	Cow Forums : Compression techniques << PREVIOUS THREAD • VIEW ALL THREADS • NEXT THREAD >>


	H.264 compression ratio by Mike Sato on May 9, 2008 at 5:12:23 am Two questions: 1. Anyone know what the approximate compression ratio is when a digital still camera uses H.264 to compress a 1280x720 video into a .mov file? 2. If the average playback bit rate for 720x480 video on a standard DVD is 5 Mb/sec, what would the approximate MPEG-2 compression ratio be? Respond to this post Return to posts index


	Re: H.264 compression ratio by Daniel Low on May 9, 2008 at 12:10:05 pm 1. Depends on the specs of the camera. 2. Depends on the source. A = source B = compressed output Compression ratio is how much is 'A' compressed by to become 'B' http://en.wikipedia.org/wiki/Ratio http://en.wikipedia.org/wiki/Video_compression http://en.wikipedia.org/wiki/Image_compression __________________________________________________________________ Please post back saying what solved your problem. It could help others, and saying 'thanks' is free! Respond to this post Return to posts index


	Re: H.264 compression ratio by Mike Sato on May 10, 2008 at 8:20:19 pm Daniel, Thanks for your response. I am still unable to get even approximate answers to my two questions from those links though. Mike S. Respond to this post Return to posts index


	Re: H.264 compression ratio by Daniel Low on May 11, 2008 at 1:04:12 am OK I'll try answering it in this way: 1. How many Megapixels is the camera and how many megabytes does 1 minute of 1280x720 H.264 video from that camera take up in space? 2. What is the format, frame size and datarate of the source you used to create the MPEG-2 and how long is it in total? __________________________________________________________________ Please post back saying what solved your problem. It could help others, and saying 'thanks' is free! Respond to this post Return to posts index


	Re: H.264 compression ratio by Daniel Low on May 11, 2008 at 1:19:09 am Actually, thinking about it, it's impossible to answer question 1 without specific technical specifications for the camera. __________________________________________________________________ Please post back saying what solved your problem. It could help others, and saying 'thanks' is free! Respond to this post Return to posts index


	Re: H.264 compression ratio by Mike Sato on May 11, 2008 at 7:32:49 pm ============= > 1. Anyone know what the approximate compression ratio is when a digital still camera uses H.264 to compress a 1280x720 video into a .mov file? < >> Actually, thinking about it, it's impossible to answer question 1 without specific technical specifications for the camera. << OK. Just looking for a ballpark answer if anyone has an idea. ============= > 2. If the average playback bit rate for 720x480 video on a standard DVD is 5 Mb/sec, what would the approximate MPEG-2 compression ratio be? < >> 2. What is the format, frame size and datarate of the source you used to create the MPEG-2 and how long is it in total? << Say a commercial DVD movie that is 2 hours long and has wide screen or 4:3 full screen pan & scan viewing options. ============= Respond to this post Return to posts index


	<< PREVIOUS THREAD • VIEW ALL THREADS • NEXT THREAD >>

FORUMS • LIBRARY • PODCASTS • BLOGS • MAGAZINE • SERVICES • NEWSLETTERS • NEWS • STORE • EVENTS

© CreativeCOW.net All rights are reserved.

[Top]