See https://bug.cinelerra-gg.org/view.php?id=677 for problem and workaround to use an old 2025 AppImage.

Root cause appears to me to be unimplemented patch - at least by February 2026 version of FFmpeg 8.1 - and hoping Andrew-R can check to see if by now there is a patch. Details in Mantis Bug Tracker of testing done.

On Wed, Jun 24, 2026 at 5:17 AM Andrea paz via Cin <cin@lists.cinelerra-gg.org> wrote:

On MantisBT, Quintao filed a bug report (BT 677) because he can't render avc_intra_100 in MXF format. He can, however, use MXF with DNxHR. I, on the other hand, can't use any MXF presets, but I can render avc_intra_100 in MOV format. Are any of you able to render in MXF?

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