LAV Filters now explicitly support the 3 important now-standard Media Types and 1 standard alias (
related code changes); the
binary (v0.74.1-26) was tested with MPC and a few MPC-based players (by disabling their internal source filter for Matroska), 100% passing Tests 1-4 and 8 (one-upping mpv in Test 8
). In the LAV Filters thread, I requested the addition of the "font/collection" support.
In retrospect, it would have been convenient if the Matroska specs had, under each AttachedFile, something like "AttachmentType", the value of which could have been 0 (default: unspecified), 1 (cover art), 2 (back cover art), 3 (embedded font), etc. Then, players could simply load everything as font iff AttachmentType=3, and it could reliably show the cover art in MKA even if a lot of images are attached.