I have a video which plays back at the wrong aspect ratio. Its resolution is 1920x818, but Infuse is stretching it vertically to fill 1920x1080.
This is the output from ffprobe on the mkv:
Input #0, matroska,webm, from 'Conviction – An Anthem Trailer From Neill Blomkamp.mkv': Metadata: COMPATIBLE_BRANDS: iso6avc1mp41 MAJOR_BRAND : dash MINOR_VERSION : 0 ENCODER : Lavf58.20.100 Duration: 00:03:45.62, start: -0.007000, bitrate: 1993 kb/s Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x818 [SAR 1:1 DAR 960:409], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default) Metadata: HANDLER_NAME : ISO Media file produced by Google Inc. Created on: 02/14/2019. DURATION : 00:03:45.601000000 Stream #0:1(eng): Audio: opus, 48000 Hz, stereo, fltp (default) Metadata: DURATION : 00:03:45.621000000