[Libreoffice-qa] Media Support in LibreOffice

Alexander Thurgood alex.thurgood at gmail.com
Tue Aug 26 14:21:18 PDT 2014


Le 26/08/2014 21:01, Robinson Tryon a écrit :

> On Tue, Aug 26, 2014 at 11:40 AM, Alexander Thurgood

>> At present, the video codecs for which support was removed by Apple in
>> QuickTime 10.3 are converted on the fly to Apple's current H264 codec.
> I'm not sure what you mean: Are you suggesting that OS X/QuickTime
> 10.3 is doing on-the-fly transcoding of some content?

Yes, it transcodes files on the fly for the formats and codecs that were
previously supported in QT 7.

>> If a user wants read/export support for codecs that were previously
>> supported by Apple, then they can still download QuickTime 7 (for the
>> moment at least, but that'll be pulled soon enough no doubt).
> If QuickTime 7 is EOL, or is only available on versions of OSX that we
> are moving away from, then let's ignore that.

Yes, ultimately this can't be a long term solution.

> So Perian still might be an option for some users? That's actually
> very useful. If Perian is indeed still compatible with modern builds
> of OS X, then that might be our best option to promote for audio/video
> playback inside LO. Have you tested that at all?

No, I've not tested Perian since OSX 10.4

> AFAIK neither installing VLC nor installing MPlayerX will add codec
> support to QuickTime, correct?

Correct, they each load their own codec interpretation libraries.

>> Obviously, if there is no support in QuickTime for the video format you
>> want to play in LO, then you are stuck, because you won't even be able
>> to insert the file, let alone play it back if someone else has given you
>> a file with an unsupported video codec in it. The same goes in general
>> for the audio codec support.
> To clarify, you're suggesting that one will only be able to insert an
> audio/video file if the container format is supported by QuickTime,
> right?


> For example, you did a test on OX X 10.9.3 with LO (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

My tests with master 4.4.0 were with my own build on which I used the
--enable-vlc switch, and I am assuming it is this that allowed me to
have some form of success with those containers. I am waiting for a new
build to complete that no longer uses that switch to see whether Michael
Meeks' comments on my bug issue alter the results of my tests.


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