Multiple audio tracks

Hi Peter!

So far we had not added such feature. We will discuss it with the team. In what format is your file?

Thanks,

Lucia

Hello Peter,

MXF doesn’t have HTML5 support and I don’t see any library which would allow its playback (like for example HLS.js lets to play HLS using the HTML5 feature called Media Source Extensions even if HLS is not supported by the browser directly).

If you can create the MP4 file like this:

1) Your-Video-Title-lang-en.mp4
2) Your-Video-Title-lang-de.mp4
3) Your-Video-Title-lang-fr.mp4
…
8) Your-Video-Title-lang-sk.mp4

Then you could use FV Player Pro feature for Quality Switching to serve them all in a single player and allow use to pick the language: https://foliovision.com/player/basic-setup/quality-switching

However you might need to also provide a mobile version of the video alongside the HD version, so you would end up with up to 16 files and the quality switching menu would have too many items for it – there would have to be “English – Mobile” and “English – HD” and so on.

So the best solution would be to use HLS. In that one you could have a single video track (or as many qualities as you need) and then multiple audio tracks.

Thanks,
Martin

Hello Peter,

we can make that work. Information about the audio tracks is available via the HLS.js API, so we could add a button for it in player control bar like similar to the subtitles button: https://foliovision.com/player/demos/subtitles

Thanks,
Martin

Hi Girish,

Yes, that is basically true.

Multiple audio tracks are supported only on browsers which support HLS playback with HLS.js library. Because of the core device restrictions Apple devices will automatically choose the audio track based on your OS settings.

Thanks for reminding us, we’ll add that to our documentation.

Making the web work for you,
Juraj

Hi Girish,

Since it’s restricted because of the core device restrictions I’m worried that there’s no way to achieve this. I couldn’t find anything similar to it on the web either.

However, I’ll discuss it with our senior programmer later and I’ll keep you posted.

Making the web work for you,
Juraj

Hello Girish,

We’ve in-depth checked the multiple audio tracks support on iOS and we’ve found properties with which we actually can control audio tracks.

Mistake was on our side and it was caused by Apple’s inadequate documentation. As you can see here. So, we’ll add support for multiple audio tracks to iOS in close future.

I’ve discussed the implementation time possibilities with our development team and unfortunately our list too hot at the moment. Although I can’t guarantee the exact time, the multiple audio track support for iOS may be released within couple of weeks. I’ll keep you posted about the process.

Thanks for bringing this topic to us,
Juraj

Hello Girish,

we have prepared this improvement (working audio menu on HLS in Safari) for the next FV Player release. You can already test it out here: https://foliovision.com/player/demos/multiple-audio-tracks

Thanks,
Martin

Hello Joern,

This largely depends on your method of transcoding the multiple audio tracks.

Most software that allows for adding multiple audio tracks also allow to add default and non-default tags to the audio streams. For example, we recommend using MKVToolsNix: https://foliovision.com/player/audio/multiple-audio-tracks-player which has a ” “Default track” flag ” setting.

If your software of choice doesn’t have this option, the streams tend to be arranged based on the order of transcoding. So, the first audio added will be assigned as default.

If you use FFmpeg, besides the order of streams, you can also use the “-disposition” command to make sure.

Let me know, if you have any other questions.

Making the web work for you,
Maria