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wishingstar
19th February 2003, 08:37
Everyone, please share with me the information about how fast is divx encoding with your hardware.
Recently many PC hardware sites include audio/video encoding benchmarks in their test.
However, there is no default format for the testing among the sites and each benchmark sites come up with different numbers.
I can hardly relate to those numbers of benchmark results and how fast, it actually does encoding in real life, other than a general idea of which CPU is faster than which…

For instance, my hardware,
Althon XP 1700+
Soyo K7V Dragon plus, VIA KT266A chipset
512MB of DDR2100, CL2.5

Using
DVD2AVI saved project file
AviSynth framesaving
VirtualDub 1.4.13 to encode

DVD vob (MPEG2) 2 hours movie, encode with Divx 5.0.3, 650 bitrate, no filters used, no audio mux (at 1st pass), and encoding standalone operation on Windows 2000.
It takes about 3 hours with my hardware.


I am thinking about switching to P4 system near future, and I would like to know, how much faster divx encoding could go with P4, since some principle encoding softwares such as divx codec and VirtualDub are optimized for Intel’s SSE.

Please share with me information about your hardwares, encoding softwares, and conditions of your encoding, and general idea (amount of time…… minutes, hours, days?!) for speed of your encoding.

OsirisMedia01
20th February 2003, 11:41
Hrmm well I dont do things as you did
But if I recall, using VirtualDUB MOD, so going from a VOB > AVI

usually enocidng with divx 5.02, 250 keyframe, 30% threshold change, quantizer of 5, all others default I think. I normally get around 40 fps enocidng I think.

So I think its normally around 1.5 hrs maybe a lil less.

Thats with a
P4 2.4GHZ
512MB PC2100 DDR
on WinXP

SOrry I couldnt be more percise but since I brought my DVD Burner I dont tend to need to divx em anymore.

doaa
20th February 2003, 23:41
Pentium 4 1.7GHz
MSI i850 Pro5, Intel 850 Chipset
256MB PC800 RD-Rimm's
WinXP Pro

VirtualDubMod
Filters:
De-Interlace, Crop, Resize to 576x
Divx 5.0.3,k-frame 75, 2-pass 800~900 bitrate.
Audio 2 mp3 320kps stereo

Approx 30~35fps

Hope some use:)

ppera2
22nd February 2003, 21:42
Encoding speed depends much from resolution. If source is full PAL 720x576 it uses much CPU power for Mpeg2 decoding. If it's croppable then it goes much faster. Target resolution has also big influence to speed.

So, without exact parameters there is no sense talking about encoding speed.

Here is my average example: DivX 5.02, encoding with DVD2AVI 1.72 (it has resize) :

Source res is 720x576. Cropped to 704x416. Resized to 704x320 .

First pass : about 38 fps, second pass over 50 fps. (with MV file).

It is faster than AVISynth method some 20-30%.

XP 1700@1900, 256 MB DDR 2100, 2x7200 rpm HD (one for source, other for target - it increases speed too).

colordog
23rd February 2003, 20:51
A few months ago, I had a system like yours (Athlon XP 1900+, KT266A chipset, 0.5GB DDR266 ram), and then did what I thought I'd never do, and ditched AMD after reading so many reviews. Anyway, now I've got a P4 2.4GHz with 0.5GB of 1.066GHz DDRAM on an i850e chipset.

For the settings I used (blah blah), on the old system, a movie would incode from start to finish at about 0.25x. (That is, a one hour segment might take four hours for the two passes, audio, and assembly). On my current rig, it's sped up to 0.9x.

Let me know if you want more specifics.

ppera2
23rd February 2003, 21:20
@colordog

It's known that DivX 5.xx codec has good optimizations for SSE2. Also, it likes fast memory bandwith. So, your system is very good for it. But I don't believe that it's 3.6 times faster than mentioned Athlon system. Real would be some 50-70% faster.

So, I recommend to you to make test like I gave here. DVD2AVI 1.72, DivX 5.02 (or 5.03) ... same resolution etc.

If it's problem, you can try simpler: VCD (352x288 PAL or 352x240 NTSC) res MPEG1 video with Virtual Dub. FPS must be over 100.

Btw. Lame speed: ABR 96 kbps stereo - I have 21x speed. As I see, it is not so dependant on memory speed, but pure CPU speed.