Avisynth and ffvfw

[saeed]

I have some questions regarding ffvfw included in version 2.52

how do I use ffvfw with avisynth? Is it a replacement for avisource for example? Can I use it to open some of the Divx3 movies in YV12 that only play in RGB?

One thread mentioned the use of MakeAVIs to convert avs files to YV12, what about ConvertToYV12 filter?

I searched a couple of times and tried both of their sites without a result :(

Please help or guide me to an article or a thread regarding this.

[sh0dan]

There are several features of the ffvfw package supplied (this information should probably be put somewhere it can be found):


Decoding YV12 to other colorspaces. This is what vdub(mod) needs to display YV12 in the preview window.
Creating clean "fake" AVI files that will make it possible to open Avisynth scripts in all applications.
Decoding of MPEG4 material.
Encoding.


ad. 1) This feature is needed for (most) applications that doesn't directly support YV12 input. Vdub preview for instance requires the material to be in RGB - this is where ffvfw helps out.

ad. 2) This is a powerful feature - use the makeAVIS application that is also installed by the package. What it basicly does is that is wrappes the AVS file inside an AVI file, so that it seems like a valid AVI file, for applications that doesn't purely use the VFW interface to open files.

ad. 3) This can also be quite powerful. If you open the codec condifuration dialog, and enable DivX3 decompression, this will be handled by ffvfw. Check the file information in vdub, when you open the avi, to see which codec is decompressing your material. ffvfw is able to deliver YV12 material, so the problem with RGB32 only input is now a thing of the past!

ad. 4) Encoding is not of particular interest in our case.

[tempetai]

Just to report that my Ulead Media Studio and Video Studio crash after installing ffvfw lite that comes with Avisynth 2.52. They works fine after uninstall the ffvfw.

Sh0dan, is there any known issue on this ffvfw lite?

[digitalman]

Same here with Ulead DVDWorkshop even on the latest June version at Sh0dans website. Just one of the reasons it is no longer included in the Avisynth distribution.

[tempetai]

My PC just crash last weekend. After reinstalling XP, I'm not able to view the YV12 anymore. I have reinstalled avisynth, ffvfw and Panasonic DV Codec as what I did before. But, no luck this time. Is there any setting that I have missed out? No problem on the other colorspaces. Help please.

[tempetai]

Ok, I think I know how to solve this problem now. Just tick Raw video on the supported FourCCs list. I'll try it tonight.