View Full Version : Extremly blocky, why? (XviD-1.0-Beta3-26122003)


new_age
14th January 2004, 19:16
Hello!

The source: 704x576 25 fps, huffyuv, tv capture (almost dvd quality).

Tried with
* divx 3.1 nandub 1.0rc2, two pass in full processing mode

codec default settings, except Bitrate: 900kbps

* xvid 1.0 beta 3, virtualdub 1.5.4 P4, in fast recompress

codec settings: pressed Load defaults, and then

FIRST PASS:

Profile @ Level: Unrestricted
Quant: H.263
All check OFF
Encoding type: Twopass - 1st pass

Advanced options:
Motion: 6 - Ultra high
VHQ: 1 - Mode Decision
Use chroma motion ON
Frame drop ratio: 0
Max I-Frame: 300
Use cartoon mode: OFF
Turbo ;-) OFF
Quant: 2-31, 2-31, 2-31, Trellis quant ON

SECOND PASS:
Default + bitrate 900kbps

After encoding the DivX 3.x is very smoot almost no blocks, very good

The xvid encode is extremely blocky compared to divx 3.x

Is this normal or my settings are wrong?

-----------------------------------------------
AviCheck 4.06.166 results

File: nandub.avi
Total Streams: 2
Running Time: 0:04:01
Index Chunk: Yes
Index Errors: 0
Interleaved: Yes
Max Bytes Per Sec: 0
AUDIO: 0 - MP3 (0x55)
Average Bitrate Per Sec: 127 kb/s
Samples Rate: 44100 Hz
Channels: 2
Bits Per Sample: 0
Variable Bitrate: No
VIDEO: DIV3
B-VOP: No
S(GMC)-VOP: No
QuarterPixel: No
Frame Size: 704 x 576
Average Bitrate Per Sec: 921 kb/s
Frames Rate: 25.000
Color Depth: 24
Total Frames: 6040

---------

File: xvid.avi
Total Streams: 2
Running Time: 0:04:01
Index Chunk: Yes
Index Errors: 0
Interleaved: Yes
Max Bytes Per Sec: 0
AUDIO: 0 - MP3 (0x55)
Average Bitrate Per Sec: 127 kb/s
Samples Rate: 44100 Hz
Channels: 2
Bits Per Sample: 0
Variable Bitrate: No
VIDEO: XVID
B-VOP: No
S(GMC)-VOP: No
QuarterPixel: No
Frame Size: 704 x 576
Average Bitrate Per Sec: 818 kb/s
Frames Rate: 25.000
Color Depth: 16
Total Frames: 6040

DoW
17th February 2004, 15:47
Try unenabling trellis. Also specify if you have done any filtering to the source (i.e. dust, convolution3d, etc.)

kilg0r3
17th February 2004, 15:54
1.)
Average Bitrate Per Sec: 921 kb/s
Average Bitrate Per Sec: 818 kb/s Hm, this is quite a difference

2.) Please check if it is a decoding issue. What decoder(s) do you use? Which idct is selected in ffdshow?

3.) SECOND PASS: Default + bitrate 900kbps
Does this mean that the second pass settings were different from the first pass settings?

4.) Why don't you use the latest releas?