PDA

View Full Version : Crappy quality in Action Scene



wiak
2 Jul 2003, 04:56 AM
Crappy quality in Action Scene
Am using FlasKMPEG 0.78.39 (Beta) to encode VOB to XviD

XviD Config Setup:
Video Bitrate: 846 kBit/s
Audio Bitrate (mp3): 128 kBit/s
and just standard :P

Hardware:
NVIDIA GeForce4 Ti 4800 SE (128 MB)
AMD Athlon XP, 1800 MHz (6.75 x 267) 2200+
TwinMOS PC2700 DDR-DIMM 512MB CL2.5
Minne 184-P (for DDR-PC333MHz
Western Digital Caviar 120GB IDE 7200RPM
Special Edition 8MB cache

Here is the not Action Scene
http://stuff.wiak.net/spiderman/Image_0006.jpg
Here is the Action Scene :(
http://stuff.wiak.net/spiderman/Image_0012.jpg
scdlcgs
2 Jul 2003, 05:06 AM
what resolution are you using? because if you use a low resolution, like the output resolution for a vcd, the movie will look fine in scenes where there are no much movement, but in action scenes, where there is a lot of it, it will look like that...
wiak
2 Jul 2003, 05:10 AM
i use 704*384 (16:9)
Enchanter
2 Jul 2003, 08:24 AM
Use a resolution of 640x352 instead. The picture will not look any different in sharpness and the video will be more bit-efficient as well. Also, what min/max quantisizers did you set?
wiak
2 Jul 2003, 01:15 PM
Originally posted by Enchanter
Use a resolution of 640x352 instead. The picture will not look any different in sharpness and the video will be more bit-efficient as well. Also, what min/max quantisizers did you set?
how do i set min/max quantisizers? :rolleyes:
UncasMS
2 Jul 2003, 06:03 PM
Originally posted by scdlcgs
what resolution are you using? because if you use a low resolution, like the output resolution for a vcd, the movie will look fine in scenes where there are no much movement, but in action scenes, where there is a lot of it, it will look like that...

wrong!

taking into account that the bitrate was some 846kbps REDUCING the resolution will DECREASE those effects, since MORE bitrate will be allocated per macroblock.
wiak
2 Jul 2003, 07:02 PM
nobody helps me? :smashead:
UncasMS
2 Jul 2003, 07:06 PM
take a look at your xvid OPTIONS and your question shall be answered!
wiak
2 Jul 2003, 07:24 PM
Originally posted by UncasMS
take a look at your xvid OPTIONS and your question shall be answered!
what must i change in XviD Options? :)
Enchanter
2 Jul 2003, 10:40 PM
wiak,

"how do i set min/max quantisizers?"

Use a Min. Quant of 2 and Max Quant. of anywhere from 16 to 31. This applies to both I- and P-frames.



"what must i change in XviD Options?"

What are your settings in the first place anyway? There is no point changing them if they already are good enough.