Home > Archive > Compression > January 2006 > Compression ratios of MJPEG, MPEG1, MPEG2, MPEG4, H.263, and H.264
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
| Author |
Compression ratios of MJPEG, MPEG1, MPEG2, MPEG4, H.263, and H.264
|
|
| Reuven 2006-01-17, 6:55 pm |
| Hello all,
I was currently given the task to see how many minutes/hours I could
record on varying sizes of CompactFlash disks (from 512MB to 12GB). The
resolution is 640 by 480 at a frame rate of 30 fps and a 24bit color
space. In order to figure out how much I could record for each
different codec I need to get a good idea of a decent compression ratio
for each codec. I hope someone can help :)
Reuven
| |
| Reuven 2006-01-18, 6:56 pm |
| Thank you Michael.
I guess I'm showing my newbieness when it comes to digital video. I
thought it it was as simple as each codec having a range of compression
ratios, and of those compression ratios there was a range that provided
decent video (in between really bad and really good). The task is
proving harder then I initially thought. I will however search for t
hose standard applications you mentioned.
| |
| cypherswipe 2006-01-19, 9:55 pm |
| Well, my DVD recorder can get 4 hours of good quality video at 640x480
resolution and very good quality, or 8 hours at lower quality. (The
quality difference isn't too noticeable on most live-action shows or
highly detailed anime, but becomes very noticeable and irrtating on
lower quality cartoons and live-action shows with a lot of solid
black.) Since DVD uses MPEG2, and has about 4.5G of space (single
sided/single layer), that gives you some idea of how MPEG2 performs.
You should still run your own tests though.
Is this project restricted to the formats you listed? What about
M-JPEG2000 (the JPEG2000 version of MJPEG), or DiVX/XViD?
| |
| cypherswipe 2006-01-19, 9:55 pm |
| OOPS. CORRECTION:
I was getting the resolution mixed up. The 4/8hr is at 320x240. It gets
1/2 hours at 640x480. There is little visible difference in quality
between the 1 hour setting and the 2 hour setting.
| |
|
|
|
|
|
|
|