Hi, Looks like CIN_HW_DEV=vdpau failed with my setup. It needs to be compiled with libva.so.2 support. Here the logs: CIN_HW_DEV=vaapi cin Cinelerra Infinity - built: Apr 30 2019 17:05:16 git://git.cinelerra-gg.org/goodguy/cinelerra.git (c) 2006-2018 Heroine Virtual Ltd. by Adam Williams (c) 2007-2018 cin5 derivative by W.P. Morrow aka goodguy Cinelerra is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. There is absolutely no warranty for Cinelerra. libva info: VA-API version 1.4.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva info: Found init function __vaDriverInit_1_4 libva info: va_openDriver() returns 0 malloc(): invalid next size (unsorted) Interesting part that vainfo gives very similar info about my system with vainfo sample in PDF file. Here is my system: $vainfo libva info: VA-API version 1.4.0 libva info: va_getDriverName() returns 0 libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/i965_drv_video.so libva info: Found init function __vaDriverInit_1_4 libva info: va_openDriver() returns 0 vainfo: VA-API version: 1.4 (libva 2.4.0) vainfo: Driver version: Intel i965 driver for Intel(R) Ivybridge Mobile - 2.3.0 vainfo: Supported profile and entrypoints VAProfileMPEG2Simple : VAEntrypointVLD VAProfileMPEG2Simple : VAEntrypointEncSlice VAProfileMPEG2Main : VAEntrypointVLD VAProfileMPEG2Main : VAEntrypointEncSlice VAProfileH264ConstrainedBaseline: VAEntrypointVLD VAProfileH264ConstrainedBaseline: VAEntrypointEncSlice VAProfileH264Main : VAEntrypointVLD VAProfileH264Main : VAEntrypointEncSlice VAProfileH264High : VAEntrypointVLD VAProfileH264High : VAEntrypointEncSlice VAProfileH264StereoHigh : VAEntrypointVLD VAProfileVC1Simple : VAEntrypointVLD VAProfileVC1Main : VAEntrypointVLD VAProfileVC1Advanced : VAEntrypointVLD VAProfileNone : VAEntrypointVideoProc VAProfileJPEGBaseline : VAEntrypointVLD I've made some test with my home PC. It has debian 9 with AMD polaris GPU (open source driver) and Intel CPU without integrated CPU (Very old). I used LIBVA_DRIVER_NAME=radeonsi to enable VAAPI and CIN_HW_DEV=vaapi to run Cin-GG. I tested only a playback function with X11 video driver in settings. 4k video files runs very smooth. So video acceleration works on AMD GPU at last for decoding. Additional tests needed for encoding.