I understand the compression problem, it could destroy the separation from the lines making different iso useless, but even knowing this I would like to try... maybe it can give us an average result... why not to try?, it is not so difficult to enable dual iso for H264...
I also got another idea, maybe impossible, to implement a similar function from dng2hdr inside camera, so the camera would do the interpolation and iso merge before compression... this is the "dream"...
I believe someday the manufacturers will implement this kind of thing using a sensor similar to the 70D, there is also a new patent from canon showing the dual pixel af with different size pixels, great for different exposures...
I also got another idea, maybe impossible, to implement a similar function from dng2hdr inside camera, so the camera would do the interpolation and iso merge before compression... this is the "dream"...
I believe someday the manufacturers will implement this kind of thing using a sensor similar to the 70D, there is also a new patent from canon showing the dual pixel af with different size pixels, great for different exposures...