RealVideo 10 "Winter 2004" update

[dexx]

Can the RV10 codec be used with virtualdub for encoding?
Has there been any further updates since 10/2004?

[karl_lillevold]

no, and no. Sorry.

[stax76]

Originally Posted by karl_lillevold

no, and no. Sorry.

Is there (COM+) automation or cli and a config dialog that can be invoked or any other effort, interface or API to support developers of batch encoding applications like Gordian Knot. Supporting a codec usually is very painful, XviD is the only exception.

[Sirber]

You can use helix producer commandline, like every other RV devs used.

[Castor-Troy]

Originally Posted by Sagittaire

@ karl_lillevold

I test seriously the RV10 Rate Control ... and I humbly make some suggestion to improve it.


1) Don't use Average PSNR for RC optimization. Overall PSNR is very better for visual optimisation tweak. Use Overall PSNR in rv9log.txt.


2) Overall PSNR is better with quality mode (vbrQuality + scalingFactor). The quant prediction for New RC is not good for me. If second pass average quant is very higher than the first pass rcPFrameRefQuant then variability quant in 2 pass could be very high. That observation is confirmed by the high default overflow setting. Perhabs multipass rate control could be very better. First pass for first evaluation, second pass with first pass average quant prediction and final pass with better quant prediction. Perhabs bframe sensivity/treshold setting could be good too for test ...


3) bframe decision seem strange: 1 or 3 bframe but not 2. Bframe decision in P(n-2) B (n-1) I(n) with Iframe scene change frame is strange too:

23160	17	1752	40.08	23280	34.11	41.26	12943		100
23200	17	1508	39.96	21640	34.11	41.26	12958		100
23240	17	1180	40.35	19096	34.11	41.26	12969		100
23280	23	2120	35.15	17800	34.11	41.24	13150	d	100  ????
23320	17	13696	37.50	113648	34.11	41.25	13142	Key	100
23360	23	1304	35.37	13128	34.11	41.23	13230	d	100
23400	17	4920	36.91	60272	34.11	41.24	13230		100

IMO if you change bframe for Pframe the quality for Pframe is very higher (Pframe use previous frame, bframe use previous frame and Iframe scene change for reference ... ). Min frame PSNR is praticaly always for bframe in these particular sequences. IMO with Iframe scene change you must close GOP ...

Originally Posted by karl_lillevold

Sagittaire: these are good suggestions. Thanks!

No hope to see thoses tweaks ?