Use to record classical music concerts, the h8 zoom camcorder, which records in mov video format, and 24bit 96khz PCM audio. To merge files without changing audio and video quality, how can I set kdenlive? I noticed that it performs audio downsampling at 48khz 16 bits, which is a considerably lower quality. Can you advise me how to do it? Thank you all. Mark

kdenlive will always render your clips. That will lead to a loss, unsless you render to lossless (which, on the other hand, will result in enourmously large files).

You may want to check ffmpegs concatenate feature as described here to simply join files without cutting and without loss in quality:
https://trac.ffmpeg.org/wiki/Concatenate

Kdenlive (more precisely its backend MLT) will necessarily re-encode everything, and not sure it handles 24bits well.
To simply join video files, FFmpeg has a "concat" filter (and "copy" codecs) that will just join the media files without altering the data bits in it.

Thank you, I will do some tests and I will let you know. Thanks bye.

Unfortunately I had to bend to windows, (even if I use more than 20 years linux,) excellent video to video software also free and quick to understand. Kdenlive remains too closed, not very malleable.
Thanks

Sorry I don't understand your reply.
ffmpeg.exe is part of Kdenlive Windows archive (or can be downloaded separately), no need to switch to Linux.
How is Kdenlive "closed"?

Good luck,

Vincent