David,
Thanks for the capture -- I reviewed it and "yes" it looks slow by comparison to when I move video in the same manner.   Are you using Debian 9 or Debian 10?  We do have a static tar build at:
    https://cinelerra-gg.org/download/testing/cinelerra-5.1-debian10-x86_64-static.txz
that has some speed improvements in it.  Or if you are using Debian 9, we can make a static tar for that instead.  Static tars are very easy to load and allow for putting a temporary test build in its own space so as not to overwrite your current Cinelerra.

On Fri, Apr 24, 2020 at 1:15 PM david <brometeo@gmail.com> wrote:
El viernes 24 de abril, Phyllis Smith escribió:
> David,
> Just one quick thing for you to try though.  Timing and thus speed is
> determined by the audio.  Recently a Debian 10 user reported that when he
> had Settings->Preferences, Playback A set to PulseAudio, it was slow.  He
> switched back to Alsa, and then it was OK.  Phyllis

In my case, sound is configured to ALSA :(

--
David
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