I did a compilation with ffmpeg 6.1 and everything went well. Thanks Phyllis. (Note x Phyllis: the new "zoneplate" filter gives no error but if you try to use it the error comes up: err: Function not implemented) I tried making a new build by enabling vulkan as described in the following links: https://trac.ffmpeg.org/wiki/HWAccelIntro#Vulkan https://ffmpeg.org/ffmpeg-filters.html#Vulkan-Video-Filters It compiles without errors using "--enable-vulkan" and "--enable-libglslang" while crashing using "--enable-libshaderc". For the latter crash see cin5_shader.tar.gz In the case of "--enable-libglslang" I have no build errors, however, in the end, the ".../bin/cin" program is not created and therefore CinGG does not start. See the log cin5_glslang.tar.gz I don't see any errors in the log; there are many lines like: "/home/paz/cinelerra5/cinelerra-5.1/thirdparty/ffmpeg-6.1/libavfilter/vulkan_glslang.c:182:(.text+0xcf): undefined reference to `glslang_shader_create'" But they are not error lines or warning lines. I think it's looking for vulkan device initialization but can't find it and leave it alone....