Tried the build with megapatch_12. Everything OK: it compiles without errors. I enclose cin5_ffmpeg4.log. There are many "warning+error" concerning Latex and the html manual and many "warning" concerning c++. I don't know if they are important or not; everything works fine for me. TrueHD loading and playback works fine; I tried it with 2 examples containing video and 22 audio tracks. I have not tested the encoder. Otherwise, I wouldn't know what to test since I don't have termux/bsd/bluray. You tell me what to test. Then I tried a build with --without-thirdparty (also removing dv; libdpx and firewire), to get ffmpeg5 working. Everything works fine. As I noticed before, putting opencv plugins is not possible: CinGG doesn't start. Incompatibility with ffmpeg5? I attach cin5_ffmpeg5.log, if you want to make comparisons. There are some warnings but not the same as I had with internal ffmpeg4.