[Libreoffice-qa] Media Support in LibreOffice

[Owen Genat]

Robinson Tryon wrote
> For example, you did a test on OX X 10.9.3 with LO 4.4.0.0 (master) of
> WebM, and able to insert, preview, and get sound playback. That
> suggests that your QuickTime (and any added Components) supports
> - MKV container
> - Vorbis codec
> But probably doesn't support
> - VP8 video codec

Does anyone know whether the (any?) media framework provides container
support or does a related codec handle both the container AND audio/video
streams? I ask because I am worried that having tables on the Media Support
page with entries like:

File format:  MP4 [MP4V/AAC]
Video plays?: YES

... is tending toward simplification, particularly in relation to container
formats. Unless the audio/video stream encoding in a particular
AVI/MPEG/MP4/MKV/etc is known it is difficult to tell if a container format
is going to play or not. Some container formats support quite a few
different stream encodings (one per stream per file).

If the media framework version (e.g., DirectShow included with XP/Vista/7/8)
also affects this, then the picture becomes very complicated very quickly
(with Apple less so b/c they just seem to drop support for old stuff ;-).
Dropping old gstreamer versions is also proving difficult due to a desire to
support a wide variety of GNU/Linux versions:

https://bugs.freedesktop.org/show_bug.cgi?id=82359

Presumably this affects what containers and stream encodings are supported?
Happy to hear what others have to say and whether or not I have gone barking
mad.



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Best wishes, Owen.
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