[Matroska-devel] FFV1/MKV IETF Session followup

Steve Lhomme slhomme at matroska.org
Sat Jul 25 08:42:44 CEST 2015

On Sat, Jul 25, 2015 at 12:08 AM, Ralph Giles <giles at thaumas.net> wrote:
> Hash: SHA256
> On 24/07/15 06:36 AM, Sebastian G. <bastik> wrote:
>> How does one play a Matroska file with Firefox? It supports WebM
>> which is a subset of Matroska, but I am unable to play a Matroska
>> file that contains an h.264 encoded video, which is supported by
>> Firefox as well.
> Firefox only supports the vp8, vp9, vorbis, and opus codecs in the
> WebM variant of Matroska. To play h.264 you have to use the mp4 containe
> r.
> In Nightly and Developer Edition builds you can remux Matroska to mp4
> in javascript and play it through the MediaSource Extensions API.

Going through javascript to get around some restrictions added in the
Firefox code ? That sounds like a very bad solution.

> Hopefully that will be available in release builds in a few months.
> This API is available in Chrome, Safari, and Microsoft Edge as well.

MS Edge supports Matroska files out of the box via Media Foundation.
No need for javascript.

> As you say, WebM is a subset of Matroska. There's value in having a
> separately-labelled container with only free-to-implement codecs. I'd
> much rather people put Opus alongside h.264 in mp4 than in WebM.

Why ?

>  -r
> Version: GnuPG v2
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> cTdK8BceV9ayVtGfFeUJAsG2poqGAIyrQ7lwA4Gqbol75m7ZuiWHonglWQar8d3c
> LayMoLJRf8pRyKqqtoHKkM4nTye8Ho0y16iOzWKsAnZDDmSdUovTjQnbnBONm+FF
> XZvWoVNa3HwvxlPtGg7uN6GIN6BGjAE9OJ4jVkagTMj26YPoTS0q6/dEwTgBa8m/
> 8Enf9oFKq89BCW2aYQ7xBwqRbua78/5zP49jGP0tkVM/rwC8z3aIrtd2aGhxCFo=
> =mu3u
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Steve Lhomme
Matroska association Chairman

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