SolveigMM MPEG2 Requantizer Component (DirectShow Filter)

[Dmitry Vergheles]

SolveigMM MPEG2 Requantizer Component is an engine designed for a fast and high-quality recompression of MPEG-2 high bitrates video.
The component has been implemented as DirectShow filter. One of its main purposes is a fast DVD back up.

The demo application inputs are MPEG-2 Video Elementary Stream, MPEG-2 Program Stream, DVD VOB files.
It splits video/audio streams, recompresses MPEG-2 VES in concordance with the set compression ratio and writes audio/video streams to respective files.
Audio streams are dumped as is, without recompression.

Total audio/video output files size is approximate size of MPEG-2 or VOB file containing these streams after multiplexing.
Such one can estimate potential VOB size decrease.

Download:
http://www.solveigmm.com/?Downloads

User Guide:
http://www.solveigmm.com/files/USG_MPEG2_Requant.pdf

Pdoduct thread on Elecard's forum:
http://www.moonlight.co.il/forum/viewtopic.php?t=476

[unixfs]

does/will it work in 2 passes?

[Dmitry Vergheles]

Originally posted by unixfs
does/will it work in 2 passes?

The currect version has not such feature and though it would improve both quality and rate control we don't plan to add it for the present.

[vod]

have you tested the requantizer in terms of performance?
what is your tests?

On my PC( Celeron 2.4, 256 RAM ) MV2 file with average bitrate - 6.5 Mbit with length of 300 seconds it has being operated for a 70 seconds.
Though compression ratio was 2, the output size was 159 Mb (input is 243).

So, the performance is 300/70 = 4.3 real time.
The resulting quality is quite acceptable.

Coul I set the ratio between 1 and 2 ( f.e 1.4) ?

[Dmitry Vergheles]

The new version of SolveigMM MPEG2 Requantizer DirectShow Filter (v.1.01) has been uploaded.

http://www.solveigmm.com/files/SMM_MP2Req_2005_04.06.zip

The version has been impoved in terms of stability to MPEG2 VES bitstream errors.

[Dmitry Vergheles]

New version 1.1 is available

It accepts advanced parameters:
- a unique compression rate for each picture type I,P,B
- amount of macroblock DCT coefficients to be discarded

http://solveigmm.com/img/SMMRequant11.GIF

http://www.solveigmm.com/?Products&id=MPEG2Requant

[travisbell]

Neat... it even works on HD transport streams.

I am wondering though, even at 1.1, I am taking the file to far down. What I am looking for is for a 5GB episode of TV, I would like to simply bring it down to 4480MB to fit on a single DVD-R.

Easiest way of fixing this would be a 2 pass target size mode. If that can't be, maybe even more specific paramaters. Instead of 1.1 being the lowest, what about 10th decicals? 1.01, 1.50 etc...


Cool though guys, really cool.

[Dmitry Vergheles]

Neat... it even works on HD transport streams.

I am wondering though, even at 1.1, I am taking the file to far down. What I am looking for is for a 5GB episode of TV, I would like to simply bring it down to 4480MB to fit on a single DVD-R.

Easiest way of fixing this would be a 2 pass target size mode. If that can't be, maybe even more specific paramaters. Instead of 1.1 being the lowest, what about 10th decicals? 1.01, 1.50 etc...


Cool though guys, really cool.

Hello Travis,

Thank you for the pleasant words :)
We consider an ability of Rate Control in the requantizer.
Two-pass mode ia also considered. Perhaps the consequent versions will have these features.