@franciscolobo: What I have gleaned from reading this forum somewhat comprehensively for the past few months is that, while this and other similar ideas could work theoretically, none of the cameras has a CPU (or DIGIC processor) which is powerful enough to record raw footage and simultaneously convert it into another form. It is not a question of development, there is simply not enough remaining hardware capacity to do the job. Although at the same time I must say that all the devs laughed themselves silly a year or so ago at anyone who suggested we could one day have raw video. I believe the difference is that the raw video was in a sense always there, just waiting for A1ex, g3ggo, 1%, nanomad, etc., to figure out how to grab it and write it to the SD and/or CF cards. There is no extant stream (as far as we know, but....) of raw video which has already been converted to some other, smaller form, other than the H.264 output from the dedicated chip which is the result when shooting normally (i.e., non-raw). So far, the only possibility which seems doable to the devs (but I'm not sure if anyone is still working on it) is to reduce the bit-depth of the raw video from 14-bit to 12-bit or 10-bit, which reductions would bring only 14-29% in bitrate reduction, not enough to make the difference we need, especially in the older cameras like the 550D. Cheers!
