IT WORKS! Finally, after weeks.
It must have been building the patched version that did it. But it wasn't working when I first built it and posted that reply. I guess on my final test something else must have been wrong-- maybe there were no models online and I didn't double check that the files in 'captured' were new.
But that's the version I'm executing now so it must have worked.
The final build instructions I used
were these, which, you'll notice, say to copy the file
librtmp.so.0-- a file that doesn't exist. So I made it; I just copied librtmp.so.1 to librtmp.so.0 because I was trying everything. Edit: After doing that I also did an apt-get update and apt-get upgrade.
I wish I knew what finally made it work. But it was installing the patches via one of those sets of instructions, probably the last one. Thanks for pointing me in the right direction
supersonic80!