Re: [LAD] Streaming AV/midi
On Wed, July 2, 2014 2:22 pm, Flávio Schiavoni wrote: Hi Patrick A first advice is to try some tool that works with multicast / broadcast addressing method to allow a one to many connection. It means to work with UDP because TCP can not do multicast or broadcast. So you can save some bandwidth. Since RTP is not a transport protocol but a kind of application protocol over UDP, a tool RTP based can be used. If I'm not wrong, Icecast works with TCP. I dunno if it can be configured. Thanks for that tip. I am currently looking at ffserver with ffmpeg. IIUC it can support RTP too so that might be a good way forward. I have it running on my device and I am testing the stream/codec combinations at the moment. Gotta hand it to the ffmpeg devs for keeping keeping pace with the market. Some questions: - Do you need to sync audio / video / MIDI? Not really sample accurate but 2000ms is the limit for lag. - What is your audio / video / MIDI source? File? Cam? /dev/graphics/fb0 + external BT microphone - How will it be used on the receiver? Monitor? Projector? If I use ffserver the output will be displayed as a video stream at the application level. Pure Data can send audio / midi / video. I will look into PD if ffserver is unable to get the job done. If I'm not wrong, GStreamer can do it too. Cheers Schiavoni Em 01-07-2014 06:34, Patrick Shirkey escreveu: Hi, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? I am looking at the following options: 1: ffmpeg streaming server 2: icecast with netjack 3: netjack There are some limitations. 1: Server is a mobile device with dual core ARM chipset 2: Wifi connectivity with 20Mb/s total uplink from master server. An ideal implementation would allow 20 client devices to receive the audio stream in close to realtime. Upto 100ms delay would be acceptable. I'm weighing up the benefits from using FFMPEG to stream all the data compared to a 32/64bit icecast stream with additional midi triggering for visual data located on the client app. - FFMPEG has the benefit of removing all trigger events but costs a lot in terms of bandwidth/power consumption. - Icecast is very good at serving audio but iiuc does not support video/midi - Netjack can potentially do all three but is not well tested on a mobile platform. -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
[LAD] Streaming AV/midi
Hi, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? I am looking at the following options: 1: ffmpeg streaming server 2: icecast with netjack 3: netjack There are some limitations. 1: Server is a mobile device with dual core ARM chipset 2: Wifi connectivity with 20Mb/s total uplink from master server. An ideal implementation would allow 20 client devices to receive the audio stream in close to realtime. Upto 100ms delay would be acceptable. I'm weighing up the benefits from using FFMPEG to stream all the data compared to a 32/64bit icecast stream with additional midi triggering for visual data located on the client app. - FFMPEG has the benefit of removing all trigger events but costs a lot in terms of bandwidth/power consumption. - Icecast is very good at serving audio but iiuc does not support video/midi - Netjack can potentially do all three but is not well tested on a mobile platform. -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] Streaming AV/midi
On Tue, Jul 1, 2014 at 5:34 AM, Patrick Shirkey pshir...@boosthardware.com wrote: Hi, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? - Icecast is very good at serving audio but iiuc does not support video/midi IIRC, icecast2 can stream video. Never thought to try midi. -- Patrick Shirkey Boost Hardware Ltd all the best, drew -- http://freemusicpush.blogspot.com/ ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] Streaming AV/midi
On Tue, July 1, 2014 10:41 pm, drew Roberts wrote: On Tue, Jul 1, 2014 at 5:34 AM, Patrick Shirkey pshir...@boosthardware.com wrote: Hi, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? - Icecast is very good at serving audio but iiuc does not support video/midi IIRC, icecast2 can stream video. Never thought to try midi. According to the icecast folks the latency and sync for a standard stream can get out to 10 seconds which is outside of my range. I could probably handle upto 2000ms but less than 1000ms is preferable. Anyway I will give icecast with video a test run before I rule it out. -- Patrick Shirkey Boost Hardware Ltd all the best, drew -- http://freemusicpush.blogspot.com/ ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] Streaming AV/midi
On Wed, July 2, 2014 12:57 am, Arno Däuper wrote: Hello, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? maybe you can use the fact, that Midi is serial data. It could be possible to pipe it into netcat. Netjack already takes things a few steps further than that with audio and midi streams. Integrating Icecast with netjack would be a powerful tool. I have asked on the icecast list if they have thought about such things. -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] Streaming AV/midi
On Wed, July 2, 2014 5:16 am, drew Roberts wrote: On Tue, Jul 1, 2014 at 11:34 AM, Patrick Shirkey pshir...@boosthardware.com wrote: On Tue, July 1, 2014 10:41 pm, drew Roberts wrote: On Tue, Jul 1, 2014 at 5:34 AM, Patrick Shirkey pshir...@boosthardware.com wrote: Hi, Does anyone have a suggestion for open source solutions to enable streaming AV/midi to multiple ARM mobile devices with a one to many network configuration? - Icecast is very good at serving audio but iiuc does not support video/midi IIRC, icecast2 can stream video. Never thought to try midi. According to the icecast folks the latency and sync for a standard stream can get out to 10 seconds which is outside of my range. I could probably handle upto 2000ms but less than 1000ms is preferable. What are you thinking of using to do the shouting? IIRC, we were using vlc. For this project I will probably have to build a custom tool that uses ffmpeg for transcoding. VLC might be a good place to start but the codebase is pretty large if I have to customise it so it's probably faster to start from scratch. Concerning the sync, if you mean audio with video, what we were doing did not require synced audio. This project probably doesn't require realtime sample accurate sync but the latency should be within 2000ms between audio and video streams and also between master/client. Latency should be as low as possible with a balance between cpuload and bandwidth management. Has anyone benchmarked realtime transcoding on dual core arm devices with ffmpeg? Anyway I will give icecast with video a test run before I rule it out. -- Patrick Shirkey Boost Hardware Ltd __ all the best, drew -- http://freemusicpush.blogspot.com/ -- Patrick Shirkey Boost Hardware Ltd ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
Re: [LAD] Streaming AV/midi
On Tue, Jul 1, 2014 at 6:34 PM, Patrick Shirkey pshir...@boosthardware.com wrote: 1: ffmpeg streaming server 2: icecast with netjack 3: netjack I've been looking into a similar problem. Have you considered RTP/RTSP? It seems to have some degree of native support on both Android and IOS as far as I can tell, and should technically be capable of low latencies, but that's as far as my research has gotten. ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org http://lists.linuxaudio.org/listinfo/linux-audio-dev
