https://bugs.kde.org/show_bug.cgi?id=510531

--- Comment #1 from Martin Schnitkemper <[email protected]> ---
The crash issue when rendering with the hevc_vaapi codec has been identified
and resolved by the MLT developers:
https://github.com/mltframework/mlt/commit/13d1c0ee242471db6ca3cb55aee48f4d32058573

The problem of the "[filter avfilter.fieldorder] Unexpected return format
error" remains, however. After reviewing older project files, I saw that this
filter was also used implicitly before when the project settings were set to an
"interlaced" profile. This also explains why the display errors (white content)
only occur in the Project Monitor. So, it's not new that this filter is being
loaded, but what is new is that it no longer works and displays the error
message mentioned when used. Therefore, I'm withdrawing my suggestion from the
initial bug report to make the filter configurable, as it's clearly necessary
for correct processing. Instead, the reason the filter can no longer be loaded
needs to be addressed.

I'm currently working around this by explicitly setting the input material to
"progressive" and adjusting the project profile, as processing interlaced
material is currently not possible.

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