Both Andrea and I tested the patch with Andrea's notes in BT #677.  I also get bad results and am still looking for a workaround other than using a 2025 older AppImage prior to 8.0 - right now we are at FFmpeg 8.1 and I would like to at least check 8.0 to see how that works.

On Wed, Jun 24, 2026 at 10:48 PM Andrew Randrianasulu <randrianasulu@gmail.com> wrote:

Can you check if this patch fixes mxf profiles, while still leaving our language info etc in ts and other formats?

чт, 25 июн. 2026 г., 06:02 Andrew Randrianasulu <randrianasulu@gmail.com>:

чт, 25 июн. 2026 г., 05:17 Phyllis Smith <phylsmith2017@gmail.com>:

Andrew, I will also try to figure out what the cause is using gdb.

I tried to set breakpoint ("b" command in gdb )  to

avformat_write_header

but because Termux libavformat stripped from symbols for size reasons

single stepping ("s" command) just returned me to our function

with already-set error code.

if I skip this error checking and go ahead libavformat segfaults kater

on openjpeg/DNxHR at least (mxf openjpeg profile need change of encoder

from libopenjpeg to jpeg2000 - libopenjpeg encoder was removed If I remember

correctly some time ago from ffmpeg).

On Wed, Jun 24, 2026 at 6:08 PM Andrew Randrianasulu <randrianasulu@gmail.com> wrote:

чт, 25 июн. 2026 г., 00:51 Phyllis Smith via Cin <cin@lists.cinelerra-gg.org>:

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.

Yes, I am looking into it

So far using termux's shared ffmpeg 8.1.2 libs  I hit same error.

Not really obvious what causes it - avformat_wrie_header returns error, but there is no muxer-specific mxf write_header function in libavformat/mxfenc.c ?

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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