Hello,

When I trim a clip at the beggining, the rendering don't put new image frame (I think). So I have a grey image during 1 second...

Do you have any ideas ?

With a
avconv -i "myfile.MTS" -same_quant -acodec pcm_s16be "myfile.mov"

I don't have gray image at the beggining...
But I loose the interweaving...

Do you know what's the better video format, and so the better command line to transform my video file ?

actually, I have a panasonic HDC-SD40 but the format seems to not be fully recognized.

It uses the MOD/TOD format. Try to convert with ffmpeg -i file -vcodec libx264 -acodec pcm_s16le outfile.mkv