output MOV-quicktime, suport in blender,why kdenlive can't?
the vedio can output with MOV-RGBA in blender.
I really hope kdenlive can do it as well as blender.

and qtrle in the mlt engine with kdenlive
but，I cant export qtrle

I don't quite understand the question, is it "why can't kdenlive export Quicktime MOVs?"

It can - you can find Quicktime under 'Media Players' in the render options- but there are no further options for codecs etc.

.mov is a container format rather than a codec, so under 'File Rendering' you can choose a codec (i guess in your case QTRLE, I don't have experience with QTRLE so maybe someone else can help here?) and then click on 'New Profile' (the page icon with a green plus). There you can change .mp4 or .mts to .mov (i.e. in the text below, replace f=mp4 or f=mts with f=mov). Then save this as a new 'Render Profile'.

http://en.wikipedia.org/wiki/Codec
http://en.wikipedia.org/wiki/Container_ ... digital%29
http://wiki.multimedia.cx/index.php?tit ... ckTime_RLE