Hi Bill,
I finally took the reference file and took him to compressor. I installed x264 and got one .mov very heavy, so I had to use the handbrake to get less weight and get mp4.
I did the same operation in streamclip and got a mp4 file (x264) with same size than .mov (compressor). So in both cases, if I want the less size I have to go on 2 steps (first compressor or streamclip and then handbrake ..)
any more suggestions?
thanks.