[PATCH 0/3] MR5529: winegstreamer: Implement input media type enumeration in MPEG splitter.

[Akihiro Sagawa (＠sgwaki)]

Split from !5430. Patch 2/3 should fix amstream test failures, spotted at https://gitlab.winehq.org/wine/wine/-/merge_requests/5430#note_67851 .

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https://gitlab.winehq.org/wine/wine/-/merge_requests/5529