Quote:
Originally Posted by Dialhot
Less than this because 720*576 is the frame resolution, not the image one (the LOTR are in widescreen). Or else you have to compare it with 352x576 and not 320x416.
|
I speak about only real image here.
Quote:
Nevertheless I don't understand your point : are you saying that it's normal that the reslut is not so bad as 3100 is yet a decent bitrate to do encodes ?
|
Yes 3100 Kbps is a good bitrate for 720*576 resolution: with medium compressibility source, quality will be always good if you use a good MPEG2 encoder.
If you want comparison:
- Professional MPEG2 encoding use 4-6 Mbps for 720*576
720*576 for real image: 0.38 - 0.57 bpf
720*416 for real image: 0.53 - 0.80 bpf
- This example use 1 Mbps for 352*576
320*416 for real image: 0.30 bpf
It's 20 GB -> 4 GB converstion for size but ratio for bpf is not 1:5 but only 1:2. In fact for bpf this encoding is simply like backup convertion at 50% and use certainely the same average quantizer ...