On Tue, Oct 27, 2026 at 4:33 PM Terje J. Hanssen via Cin <cin@lists.cinelerra-gg.org> wrote:

... Phyllis, I would like to help with VAAPI and ffmpeg 9. One thing I noticed: the MLT patch fixes a hwupload/buffersink filter graph, and Cinelerra does not use that graph for encoding. It sets up the hardware frames itself (ffmpeg.C, av_hwframe_ctx_alloc and av_hwframe_transfer_data), so the fix will probably look different.

The catch: I have no hardware for VAAPI encoding, only an NVIDIA card, so I cannot test it myself. Terje, your Arc A750 encodes h264_vaapi and hevc_vaapi with ffmpeg 9.0.2. Your test shows that the driver and ffmpeg 9 work on your system. It goes through the hwupload filter, though, and Cinelerra takes another way to the GPU, so only a Cinelerra build can show whether its encoding works. Would you run test builds if I prepare a patch? Anyone else with an Intel or AMD GPU is welcome too.

Yes I can test VAAPI with an AppImage build with ffmpeg-9.0.2 on my intel platform.

Terje

Thanks. I will definitely test whatever I can concerning vaapi and ffmpeg 9.x in the QT6 version.

Meanwhile, in preparation to create new traditional CinGG AppImages on Oct. 31, I removed the 8 vaapi render formats that crash from GIT and left the 11 that just error out without crashing.