Philippe Hurbain Wrote:give the possibility to distribute length error of fixed elements flexible parts over the whole length. Maybe it's already possibleI'm not sure what you mean here, are you trying to define LSynth like skin? If so you need to set the segment size below 100% so the segments will slightly overlap, placement should be dynamic, 'max merge' disabled (1) and 'final scale' set to none.
And last you should use a donor which is available in the official library or mpd itself as it will use normal references while working with the dynamic placement method.