Found it, I followed this. https://wiki.debian.org/PulseAudio#Dynamically_enable.2Fdisable
On 12/26/20, Alan Corey <alan01...@gmail.com> wrote: > Uh-oh, I do have PulseAudio installed, didn't intend to. Using a > Daniel Thompson Debian Bullseye on a Piinebook Pro. It's been up less > than 4 days. Getting PulseAudio and alsa to coexist is a pain because > Pulse wants to break alsa. I did it once following some instructions > but I have no reason to keep Pulse. I just tried: > > cmd: '/usr/bin/mpg123 --output alsa "/data/mp3/pink_floyd/1 - Studio > Albums/1979 - The Wall/CD 2/Comfortably Numb.mp3" ' > > Which I thought I'd tried before, but that was before changing the > group. Didn't hear anything but nothing in the Apache error log > either. lsof should show the mp3 file open I think. Or maybe ps ax. > Could be something in Apache's security but it's calling my CGI > program OK. Oh, I'm calling mpg123 from a system() call and not > checking the return, I was rushing it. > > The eventual machine will probably be a Raspberry Pi that will get > used for other things but not at the same time. I like having it on > the web (NATed LAN actually) because there are phones, Kindles. > computers in the house which could all control it. That part's mostly > written, trying to actually hear audio was the last part. I have just > over 10k MP3 files, but my loader will scan them and make web pages. > In about 1/2 a second on this nvme SSD so it's painless to generate. > I'm into writing these recursive directory climbers in c sometimes. > > Oh, Australia, land of radio astronomy. I'm ab1jx. Haven't been on > the air in 10 years or so but I keep the license up. > > > > On 12/26/20, Stuart Longland <stua...@longlandclan.id.au> wrote: >> On 27/12/20 7:33 am, Alan Corey wrote: >>> Directory:/data/mp3/Queen/-- Studio Albums --/(1975) A Night at the >>> Opera/ >>> Playing MPEG stream 1 of 1: 11 Queen - Bohemian Rhapsody.mp3 ... >>> [src/libout123/modules/portaudio.c:120] error: Failed to open >>> PortAudio default stream: Device unavailable >>> main: [src/mpg123.c:323] error: out123 error 7: failed to open device >>> >>> Why is it now trying PortAudio? And failing - Audacity works with it. >>> Could it be something not in www-data's path? >> >> It might be a default for `mpg123` or `libao` (the back-end library used >> by `mpg123`). I haven't used `mpg123` for a long time now but I think >> in the man page, there's a documented flag to point it at a different >> back-end such as ALSA directly. (I switched to Ogg/Vorbis to "clean" >> out the illegally downloaded files I had in that format, and because >> MP3's licensing was a pain back in 2004. As a bonus, storage >> requirements shrunk by 40%.) >> >> If the machine is acting as a music jukebox and nothing else, it >> probably makes sense to disable PulseAudio in this situation since >> there's only the one "user" of the sound card, PulseAudio really doesn't >> offer much other than maybe Bluetooth speaker connectivity (and there >> are ways to do that without PulseAudio too). >> >> PulseAudio will need the user that runs it, to have "real-time" rights >> (configured in `/etc/security/limits.conf`). Not sure if `www-data` >> will have those rights as it's a rare requirement for CGI scripts. >> Alternatively, I think PulseAudio can be run in a "system" mode, have a >> read of its documentation, maybe that might work in your situation. >> >> The other option you might want to look into, rather than trying to make >> PulseAudio or ALSA work as the CGI user, instead look at making a >> back-end daemon look after whistling up `mpg123` to play music, and have >> the CGI script talk to it via some IPC mechanism (SysV IPC, Unix domain >> sockets, private HTTP API, Redis/AMQP/MQTT whatever). >> >> I'd strongly suggest having a look at `mpd`, as while there's probably >> some educational value to re-inventing the wheel, it looks like >> someone's done the work for you: `mpd` itself can act as that back-end >> service, and there are already web-based front-ends to talk to it. >> -- >> Stuart Longland (aka Redhatter, VK4MSL) >> >> I haven't lost my mind... >> ...it's backed up on a tape somewhere. >> >> >> _______________________________________________ >> Alsa-user mailing list >> Alsa-user@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/alsa-user >> > > > -- > ------------- > Education is contagious. > -- ------------- Education is contagious. _______________________________________________ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
