I downloaded a new ffmpeg-4.4.tar.xz and now the compile error happened a little bit later. I attach the cin5.log. However I think that the fault is not the tar.xz but mine, that I had removed also the ffmpeg.git patches, during some tests, in addition to the ffmpeg-4.3 patches PS: I tried a build without patches, but including the 3 of h265 present in git. The installation works, but trying to render using h265 at 10bit and h265 at 12bit, leads to these errors: [libx265 @ 0x7f3fa57f2400] Specified pixel format yuv422p10le is invalid or not supported FFMPEG::open_encoder err: Invalid argument int FFMPEG::open_encoder(const char*, const char*): open failed libx265:/home/paz/video_editing/prova/10bit.mp4 Render::render_single: Session finished. [libx265 @ 0x7f3fa57ef400] Specified pixel format yuv422p12le is invalid or not supported FFMPEG::open_encoder err: Invalid argument int FFMPEG::open_encoder(const char*, const char*): open failed libx265:/home/paz/video_editing/prova/12bit.mp4 Render::render_single: Session finished.