With FFmpeg updated to 9.0.2, there are new AppImages now available for download.  Release notes of what has changed is below.

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GIT for Cinelerra-GG has the following changes from 09/01/2026-10/31/2026

FFmpeg has been updated from 8.1 to 9.0.2. It was discovered since version 8.x, a new requirement
 that in addition to the "-hwaccel_device" option, the "-vaapi_device" option has to also be included.
 So pending ongoing analysis, rendering using any of the “vaapi” video formats will give an error
 message. Any formats that have been known to crash were temporarily removed.
The previously deprecated AVCodec pix_fmts, sample_fmt, and supported_framesrates was removed
 from ffmpeg/libavcodec requiring fixes to fileac3, fileffmpeg, and ffmpeg.C at 9.x.
Updated ffmpeg.git.patch# files for building with git to check out current non-released ffmpeg code.
Added -latomic and disabled vsx in x264 for case where it does not work on older PPC processors so
   it is now automatic. Mods provided by Andrew-R.
Patch submitted by Tarceri (Mesa drivers support person) partial fix now frees gl fb cfgs pointers
correctly on destruction.