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View Full Version : Every minute of video takes 25 minutes to encode with TMPGenc???


sumptor
19th August 2002, 16:59
I've tested several DVD compliant MPEG2 encoding software and have found TMPGenc to be the best quality wise. Great piece of software. I ran a bunch of tests over the weekend with several AVI clips and converted them over to NTSC DVD files. After crunching through the numbers, I found that on average for every 1 minute of video that you're encoding, it takes approximately 25 minutes to perform the actual encode. So a 1 hour video would take over a day to encode. Seems awfully long. Is this right or am I missing something here??

Here are the parameters that I used.

Original AVI clip was captured in Huffyuv at 720x480 resolution, YUY2 and 48 kHz, 16-bit stereo.
Conversion was to a NTSC DVD compliant MPEG2 file using the 2-pass VBR method at 6000 average, 8000 max and 2000 min kbps.
Encoding quality was set to highest in the bottom pull down menu. No filters used.
PC is a 1.2 GHz Athlon using two separate 7200 rpm drives (one as the source drive and the other the destination drive)

Just wanted to see if other users were getting similar results.

avih
20th August 2002, 08:40
yes, it's possible. the reasons are the 2-pass and the quality.
many ppl found 'normal' to be not so much different from 'highest' but 'normal' is much faster.

WarpEnterprises
20th August 2002, 22:32
(As avih said)
relative speed is: normal ~ 3, high quality ~2 highest ~1
For most sources there are (very) small difference between normal and high, but ~none between high and highest (see the Q-level in bitrate viewer).
And of course the time is proportional to the area (=final resolution) encoded! (VCD = triple speed compared to SVCD)

And with your average nearly equal the max there is not very much gain in using 2pass.

Pyre8
21st August 2002, 14:28
That makes me happy ... to be using CCE for the encodes:D