Simeon - important clarification concerning the following.  The code Andrew references was removed from CV. IT HAS NOT BEEN REMOVED from the current Cinelerra-GG, i.e. what you are using.  It does illustrate the use of a second channel for the compressed data while maintaining the one channel for the uncompressed data.  However, this code is of quite limited applicability.   Phyllis/Bill

Hi Andrew,
>
> I think this was done in old Cinelerra for some DV variants and mjpeg (in mov and avi)
>
> In old CinelerraCV it was removed in commits
>
> https://github.com/cinelerra-gg/cinelerra-cv/commit/8364fc6af3eb9b105ecf0853f79885090b12005f
> https://github.com/cinelerra-gg/cinelerra-cv/commit/0ff51f4c53e17ff33701e8cc1096de33a87313b9
>
> I remember this because I tested this (mis)feature, and found it working for
> mjpeg avi (so i was not convinced by this reasoning and just keep my copy at commit before this :E)
>
> https://git.cinelerra-gg.org/git/?p=goodguy/cinelerra.git;a=blob;f=cinelerra-5.1/guicast/bccmodels.h;h=28b58459fb74eabb72e3fbf74f371ea51786cd18;hb=HEAD

This is a very interesting finding, and something I was not aware at all.
So thanks for bringing this piece of history to my attention!
..
Maybe Einar can give additional details concerning the circumstances of the
removal?