html5 audio through jack - Linux-audio-user

Kazakore

30 Aug 30 Aug

2:09 p.m.

On 30/08/14 16:23, Iain Mott wrote:

Hi list, I'm thinking of updating some of my web pages to use multi-platform flash/html5 audio players, at present they use flash only and won't play on iPads for example. Due to some problems I was having with pulse audio in relation to my HDSP interface I have recently disabled it and all my audio is running via jack/alsa and the HDSP interface. With flash in firefox, there are no problems and the audio plays. My .asoundrc is configured with the following: pcm.rawjack { type jack playback_ports { 0 system:playback_1 1 system:playback_2 } capture_ports { 0 system:capture_1 1 system:capture_2 } } pcm.jack { type plug slave { pcm "rawjack" } hint { description "JACK Audio Connection Kit" } } pcm.!default { type plug slave { pcm "rawjack" } } HTML5 players in firefox don't play however via jack. When pulse was enabled, HTML5 content would play through the computer's built-in sound card. Now that it's disabled I can't get it to play through jack. An example page with a HTML5 player is here: http://www.html5tutorial.info/html5-audio.php Any suggestions please? A modification of the .asoundrc? I'm running Ubuntu 14.04 Thanks, _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user

Can't help but can tell you I have the exact same problem! I also don't get audio from streaming media directly from the internet (eg a web hosted .ogg) Have you managed to get that working? I use VLC's Multimedia Plugin for firefox, VLC is set to Jack, also have all GStreamer routed through Jack, but "normal" firefox audio never reaches it. Good luck with this one. It's part of the reason Arch is feeling so appealing to me right now. I can truly get a system with no P(IT)A in there! ;-) Dale.

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Kazakore

10:12 p.m.

On 30/08/14 22:48, rob wrote:

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On 30/08/14 13:09, Kazakore wrote:

On 30/08/14 16:23, Iain Mott wrote:

Hi list, I'm thinking of updating some of my web pages to use multi-platform flash/html5 audio players, at present they use flash only and won't play on iPads for example. Due to some problems I was having with pulse audio in relation to my HDSP interface I have recently disabled it and all my audio is running via jack/alsa and the HDSP interface. With flash in firefox, there are no problems and the audio plays. My .asoundrc is configured with the following: pcm.rawjack { type jack playback_ports { 0 system:playback_1 1 system:playback_2 } capture_ports { 0 system:capture_1 1 system:capture_2 } } pcm.jack { type plug slave { pcm "rawjack" } hint { description "JACK Audio Connection Kit" } } pcm.!default { type plug slave { pcm "rawjack" } } HTML5 players in firefox don't play however via jack. When pulse was enabled, HTML5 content would play through the computer's built-in sound card. Now that it's disabled I can't get it to play through jack. An example page with a HTML5 player is here: http://www.html5tutorial.info/html5-audio.php Any suggestions please? A modification of the .asoundrc? I'm running Ubuntu 14.04 Thanks, _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user

Can't help but can tell you I have the exact same problem! I also don't get audio from streaming media directly from the internet (eg a web hosted .ogg) Have you managed to get that working? I use VLC's Multimedia Plugin for firefox, VLC is set to Jack, also have all GStreamer routed through Jack, but "normal" firefox audio never reaches it. Good luck with this one. It's part of the reason Arch is feeling so appealing to me right now. I can truly get a system with no P(IT)A in there! ;-) Dale. _______________________________________________

http://alsa.opensrc.org/Jack_and_Loopback_device_as_Alsa-to-Jack_bridge might be worth looking at. rob _______________________________________________

I'm sure it used to be at the bottom of this page it had a note about how going the ALSA Loopback route would stop you being able to change settings from within QJackCtl, and just at the same point I read it there was a thread on here by somebody not being able to set up Jack through QJackCtl which at the time I assumed must be related. Can't see any comment on it anywhere at all now though... http://jackaudio.org/faq/routing_alsa.html But obviously that would be unacceptable and why I never tried re-routing ALSA. Dale.

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Joakim Hernberg

1 Sep 1 Sep

12:30 p.m.

On Sun, 31 Aug 2014 01:57:04 +0545 Kazakore <dj_kaza(a)hotmail.com> wrote:

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I'm sure it used to be at the bottom of this page it had a note about how going the ALSA Loopback route would stop you being able to change settings from within QJackCtl, and just at the same point I read it there was a thread on here by somebody not being able to set up Jack through QJackCtl which at the time I assumed must be related. Can't see any comment on it anywhere at all now though... http://jackaudio.org/faq/routing_alsa.html But obviously that would be unacceptable and why I never tried re-routing ALSA.

I think the nice thing about the alsa loopback is that if you stop jack, the alsa programs are oblivious to it, they keep playing to the loopback. When you start jack again and use the alsa to jack bridges (jack/zita) to connect the loopback and jack everything starts playing again. -- Joakim

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Harry van Haaren

3 p.m.

On Mon, Sep 1, 2014 at 1:40 PM, Max <abonnements(a)revolwear.com> wrote:

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That's the reason I removed QJackQtl entirely. Cadence is doing a much better job, IMHO QJackQtl should be depreciated in favour of Cadence. You can control Jack bridges for ALSA and PulseAudio from within Cadence. No more headdache.

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From your point of view, it might make sense to deprecate QJackCtl.

Please don't make the mistake of thinking everybody has the same use cases and system setup as you do. I'm glad Cadence solves your problem: QJackCtl solves mine :) Cheers, -Harry

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Kazakore

6:04 p.m.

On 08/31/2014 05:12 AM, Kazakore wrote:

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> > I'm sure it used to be at the bottom of this page it had a note > about how going the ALSA Loopback route would stop you being able > to change settings from within QJackCtl, and just at the same point > I read it there was a thread on here by somebody not being able to > set up Jack through QJackCtl which at the time I assumed must be > related. Can't see any comment on it anywhere at all now though... > > http://jackaudio.org/faq/routing_alsa.html > > But obviously that would be unacceptable and why I never tried > re-routing ALSA. > >

On 01/09/14 18:25, Max wrote:

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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 That's the reason I removed QJackQtl entirely. Cadence is doing a much better job, IMHO QJackQtl should be depreciated in favour of Cadence. You can control Jack bridges for ALSA and PulseAudio from within Cadence. No more headdache.

Actually pretty certain I was confused when I wrote that. It would be the Pulse Via Jack page that had the unable-to-control-jack-settings comment at the bottom and part of the reason for me going the Flash-Jack-plugin route (even if I did have to compile it myself.) But running US-14.04 there was really no need to do that if you're happy to keep PA running on your system, as it automatically creates Pulse-Jack-sinks which seemed to work fine enough until I disabled them... But I really don't agree with the idea of having so many audio systems, often all running in tandem! I want to keep most my playback through Jack as I like its routing options, so I'm happy enough to have it start at login. When I have some time I will have a look at the ALSA-Jack bridge but as I thought US was configured around PA and believed my FF plugin (VLC) used GStreamer I had tried setting everything related to these to Jack. Anyway going a bit off topic here. Think we should best keep it to the original poster's problem. As I said I can live with as it is, especially as I'm planning on having a play with different distros so until I settle down again I'm not going to worry about the smaller things I can live with ;-) Dale.

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Marc Lavallée

1 Sep 1 Sep

12:45 a.m.

I play the audio output of my browsers (Firefox and Chrome/Chromium) through jack. It works with HTML5 and Flash. https://docs.fedoraproject.org/en-US/Fedora/18/html/Musicians_Guide/sect-Mu… https://wiki.archlinux.org/index.php/PulseAudio/Examples#PulseAudio_through… The pulseaudio "jack" sink register as a 8 channels playback source in jack, so it works with 5.1 and 7.1 streams, not only for stereo streams. -- Marc Le Sun, 31 Aug 2014 21:42:50 +0200, Philipp Überbacher <murks(a)tuxfamily.org> a écrit :

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On Sat, 30 Aug 2014 07:38:33 -0300 Iain Mott <mott(a)reverberant.com> wrote:

Hi list, I'm thinking of updating some of my web pages to use multi-platform flash/html5 audio players, at present they use flash only and won't play on iPads for example. Due to some problems I was having with pulse audio in relation to my HDSP interface I have recently disabled it and all my audio is running via jack/alsa and the HDSP interface. With flash in firefox, there are no problems and the audio plays. My .asoundrc is configured with the following: pcm.rawjack { type jack playback_ports { 0 system:playback_1 1 system:playback_2 } capture_ports { 0 system:capture_1 1 system:capture_2 } } pcm.jack { type plug slave { pcm "rawjack" } hint { description "JACK Audio Connection Kit" } } pcm.!default { type plug slave { pcm "rawjack" } } HTML5 players in firefox don't play however via jack. When pulse was enabled, HTML5 content would play through the computer's built-in sound card. Now that it's disabled I can't get it to play through jack. An example page with a HTML5 player is here: http://www.html5tutorial.info/html5-audio.php Any suggestions please? A modification of the .asoundrc? I'm running Ubuntu 14.04 Thanks,

I'm not surprised. I am very much against anything audio (or multimedia) in browsers. Nowadays browsers do pretty much everything, but badly. One constant grieve for me since years has been that there are virtually no audio settings for the browser (for example search for 'audio' in firefox about:config). It just takes whatever it can find, whatever is default on the system, and plays back through the first two channels. It may work for 95% of the users, but if you're part of the remaining 5% you can't do anything about it. For that reason alone doing any specialised multimedia thing for the browser is just crazy, there is basically no user control. In your particular case I think it is the flash plugin itself that handled audio output, and now with html5 it is the browser that does it,and probably does something stupid. Maybe the way it rubs the ALSA API the wrong way. It is really hard to say what's going on in a browser. Sorry to be of little help. Philipp _______________________________________________ Linux-audio-user mailing list Linux-audio-user(a)lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-user

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Paul Davis

11 Sep 11 Sep

1:25 a.m.

On Wed, Sep 3, 2014 at 6:01 AM, Iain Mott <mott(a)reverberant.com> wrote:

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Thanks Marc - I got it working with these links; installing the pulseaudio-module-jack package mentioned in the first link, then preparing the scripts launched by qjackctl in the second. Pretty sure that's what I did. I also used the .asoundrc as given in my original post.

I was just faced with this challenge myself (don't ask). I found that switching sinks with PulseAudio was unreliable. I opted to use the ALSA loopback device combined with Jack1's "new" builtin support for Fons' zita-based adapters for any number of additional ALSA devices. I've been using it all day, and it works really, really, really well. Much more reliable than either the ALSA Jack plugin or switching Pulse sinks.

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