I just find out : the black borders only appear with MLV module, not in RAW module anymore... I'm used to record in 1880x854, and 1880 isn't in MLV module, that's why I do not use MLV. I have to choose... I'm pretty happy with RAW module and RAWinizer... I'm not very familiar with MLV tools

I was in your shoes, at the early stages of MLV. Now its ready. Sound is a good thing. The tools you need are also there.

Go for the Mar 2 nightly and you're good. Though I have only begun testing the mar 10, the mar 2 is what you want for MLV.

The resolutions you can do continuous recoding on a 64gig 1000x compared with a 128gig 1050X

are:

Resolution 128gig 1050 x 64gig 1000x

1X mode

1728 x 972 16:9 +- 2'9" continuous

1728 x 934 1.85:1 +- 1'11" continuous

1728 x 864 2:1 continuous/gd off continuous

1792 x 968 1.85:1 44" 2'59"

1792 x 896 2:1 continuous/GD off continuous

1856 x 928 2:1 +-34" continuous

1856 x 844 2.20:1 +-3'41" continuous

1856 x 790 2.35:1 continuous/GD-off continuous

1872 x 850 2.20:1 +-3' continuous

1872 x 796 2.35:1 +-1'32" continuous

1872 x 784 2.39:1 continuous continuous

3X crop mode with Global Draw ON

Resolution 128gig 1050 x 64gig 1000x

1728 x 972 16:9 +-1'4" continuous

1728 x 934 1.85:1 +-1' continuous

1728 x 864 2:1 continuous continuous

1856 x 928 2:1 +-18" continuous

1856 x 844 2.20:1 continuous continuous

1920 x 872 2.20:1 +-53" continuous

1920 x 818 2.35:1 +-4'28" continuous

1920 x 804 2.39:1 continuous continuous

2048 x 872 2.35:1 +-34" continuous

2048 x 856 2.39:1 +-36" continuous

2048 x 820 2.50:1 continuous continuous

On the 7D the 1050X can do 99 % of the resolutions the 64 1000x can do.