Encoding time decrease if i move from 2G+ to 3G+

[feeras]

Hi,

I know that this is a subjective question but I'm hoping for some real world experiences. Anychance anyone here moved from a 2000+ CPU to 3000+ CPU can give me a guess-timate of the speed increase for encoding (particularly for mpeg2). Are we talking 50% (in proportion with the ratio 2000->3000)?

Cheers,
feeras

[Jukka]

Haven't quite doen what you've done, but I did move from a P3 450Mhz to a Duron 1.3Ghz and my encoding times came down from about 12 hours to nearer 3 hours.

Hope this helps.

Jukka

[lordsmurf]

Faster, but not 50% faster.

[ronnylov]

AthlonXP 2000+ : 1667 MHz, 256 kb L2 cache, 266 MHz fsb
AthlonXP 3000+ : 2167 MHz, 512 kb L2 cache, 333 MHz fsb

My experience is that mpeg2 encoding is mainly limited by CPU clock speed. So your speed increase may be up to 30 %.

When I changed from Athlon XP 1800+ to XP2400+ (1533 MHz to 2000 MHz) my speed gain in Canopus Procoder was proportional to CPU clock speed increase, which in this case also was 30 %.

[RabidDog]

my own experience of moving from a p3 866 to an Athlone 2600 is that my encodes are proportionately faster by a factor of 2.5 this is a very rough and ready estimate. which is nice..

[subclubkid]

I just moved from a 1.0Ghz P3 to a P4 2.4 Ghz with a 800Mhz FSb, and my speeds are just insane. I also went up in speed in Hard drives too, so that might have a little to do with the speed. But something that used to take around 20 minutes to do now takes 3-4 minutes. So yeah speed is good.

[SaSi]

If you only change the CPU speed, then encoding speed increases proportionatelly with the MHz ratio. 2GHz CPUs encode twice as fast as 1GHz ones.

If you also change drives and switch from 5400rpm to 7200rpm, you may notice an extra increase in speed.

However, the MPEG encoding is bottlenecked by two steps:
the decoding of the source file into raw bitmap
the encoding into MPEG-2.

Some codecs are slower than others. For example, I used to edit and produce intermediate material in DivX 5.02 using the best possible quality. Then I switched to Hufyuv. I noticed a significant increase both in saving the AVI file and encoding it into MPEG-2 because hufyuv is faster than DivX.

Also, if you encode an AVI into an MPEG program stream, try to read the AVI from one drive and write the MPEG-2 onto another. If you encode into elementary streams, one for audio and one for video, try to use 3 disks. This increases encoding speed furthermore (and reduces fragmentation as well - which further increases overall speed).

[sumibas]

i moved from a 1.3 Ghaz p4with 512 rambus to 2.53 ghz DDR400 dual channel at 333 Mhz. the Instant copy of a dvd reduced from 4 hrs to about hour and a 1/2. The CCE speed was like 1 x to 2.3 x so the speed is YES.

[The village idiot]

Just a note: Comparing P3 to P4, or Intel to AMD is the same as apples to oranges. But comparing same family to faster of same family should give the increase in direct proportion to the speed increase that has already been stated.

[g_shocker182]

I have a 2.0Ghz machine...takes ~2-3hours to encode a 2hr movie.



_________________
O||||O - Its a jeep thing...