Supported containers for Videos app ? mkv ? ogm ?

Question

Hello,
the "Videos" app only shows .mp4 files (those from my previous andro phone on the SD) ,it does not list .mkv or .ogm files i added via usb storage
The phone is the Zte Open C, FFOS 1.3.0.x (20140519) (localized in french, bought from zte ebay)
1) I understand only part of the brazilian ticket below, but does Mozilla plan to add mkv or ogm compatibility to the Firefox Video App ? Or other containers ? What about formats of contents inside containers (x264 ? Xvid ? aac ?)
https://support.mozilla.org/en-US/questions/982536?esab=a&s=video&r=3&as=s
2) Are FFOS apps limited to the formats/containers listed in https://developer.mozilla.org/en-US/docs/Web/HTML/Supported_media_formats#Browser_compatibility ?
If FFOS apps are limited to these formats, can Mozilla extend the number of compatible formats for FFOS ? And is it planned ? In the design for webapps, i don't have the impression that a developer (except mozilla ?) can implement a port of a C/C++ app like VLC or mplayer to FFOS ?
I know it's a hard question, but having a phone device that can also be used as a video media player and play any video format is useful, and the less recoding/remuxing the better.

Answer 1

Hi potf,
I was finally able to track down specific details of formats, containers, and codecs that are playable in Firefox OS. This information is also applicable for Firefox browser, and Firefox for Android.
These are the file formats that are recognizable by Firefox OS ([http://dxr.mozilla.org/mozilla-central/source/toolkit/content/devicestorage.properties reference]):
* '''pictures'''=*.jpe; *.jpg; *.jpeg; *.gif; *.png; *.bmp;
* '''music'''=*.mp3; *.oga; *.ogg; *.m4a; *.m4b; *.m4p; *.m4r; *.3gp; *.mp4; *.m3u; *.pls; *.opus; *.amr; *.wav; *.lcka;
* '''videos'''=*.mp4; *.mpeg; *.mpg; *.ogv; *.ogx; *.webm; *.3gp; *.3g2; *.ogg; *.m4v;
Regarding the codecs and containers that are playable in Firefox OS, Firefox currently supports the following media formats where the decoding support is built into the browser ([http://bluishcoder.co.nz/2013/08/21/html-media-support-in-firefox.html reference]):
* '''Opus''' audio in an Ogg container on all platforms.
* '''Vorbis''' audio in an Ogg or WebM container on all platforms.
* '''Theora''' video in an Ogg container on all platforms.
* '''VP8''' video in a WebM container on all platforms.
* '''WAV''' audio on all platforms.
Support for the following formats in Firefox uses operating system decoder support. This means coverage is not available across all platforms. We are working towards this goal:
* '''H.264''' video in an MP4 container on Firefox OS, some Android devices, and Desktop on Windows Vista and up.
* '''AAC''' audio in an MP4 container on Firefox OS, some Android devices, and Desktop on Windows Vista and up.
* '''MP3''' audio in MP3 files on Firefox OS, some Android devices and Desktop on Windows Vista and up. Support for Windows XP is coming in Firefox 26.
We hope you find this information useful. Please let us know if you have any other questions.
Thanks,
- Ralph