The 2 modifications I made are in bdcreate.C to temporarily comment out the choices of lpcm and truehd as neither 1 works for me (see error messages in previous email).

those mesages come from players themselves?

No, from bdwrite -- see the last line in the terminal output below for the error message when I choose "truehd" and then "lpcm". I verified that 0004-Improve-truehd-decoder-encoder-from-ffmpeg.git.patch is in as well as all of the patches as stated earlier.

be sure there is no old bdwrite binary in PATH?

It is rare that I change $PATH from or even add cnelerra: /root/.local/bin:/root/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin

PATH=/root/.local/bin:/root/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/tmp/cinelerra-5.1/bin

However, the choice of "tsmuxer" works, or at least does something and creates no problem but I do not see or hear any difference if checked off or on.
you need to have tsmuxer binary in $PATH to see it used
I wonder why the output is different when I check the tsmuxer box than when I don't?

Because I do not check for tsmuxer existence in C code, and just write universal sh script doing check for us?

Never mind -- it is different just when running it twice so there must be timestamps in it.

I did download tsmuxer source code, but when it said I needed "ninja", I stopped and just laughed. Maybe later I will try again.