Narasimha-sc and GitHub 11c7a62a38
desktop: fix stretched video preview and playback for AV1 videos ( #7391 ) ...
* desktop: fix stretched video preview and playback for AV1 videos
libvlc passes the padded size the decoder allocated to the buffer format
callback, not the size of the picture. dav1d pads to a multiple of 128, so
a 1920x1080 AV1 video arrives as 1920x1152, and vlc scales the picture to
fill it - the preview sent with the message, and desktop playback, were
6.7% too tall. H264 pads much less, so it was barely visible there.
Ask for the size of the track being played instead. It is already populated
when the buffer format is negotiated, and matching the track that is playing
matters for files with more than one video track, where the first track is
not necessarily the one being decoded. Falls back to the previous behaviour
when the track is not known.
* plans: desktop video preview aspect ratio
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