Docker image with membrane_webrtc_plugin
Hi! I have some issues with running a Phoenix app in a Debian-based docker. Whereas it can be built, when I am running it, it crashes:
```
=CRASH REPORT==== 23-Apr-2025::21:25:12.868807 ===
crasher:
initial call: supervisor:kernel/1...
Creating a Phoenix channel source
Hi! I need to process an audio stream (webm/opus) coming in through a channel (websocket) in phoenix and I'd like to use membrane to do it.
Is the way to do it to write my own membrane source that is essentially a "beam message source" - ie. reads messages sent to it from another process and then passes that along to the next stage in the pipeline? And then have the channel process send the message to the "beam message source" element
And then similarly if I want to send messages back to the channel at the end of the pipeline, would I be making a "beam message sink"...
Testing a Membrane Bin used in a WebRTC Engine Endpoint
I'm trying to test a membrane bin that I use in WebRTC engine endpoint. Though I'm having trouble getting my test setup properly.
I was trying to approach is this way:
1. Start my
Membrane.Testing.Pipeline with a simple spec, just the conversation bin
2. Send a {:new_tracks} event to the bin, simulating what the Membrane.WebRTC.Engine does when a new bin is assed as an endpoint...WebRTC - Add Track to running PeerConnection
I have started out with the Nexus WebRTC example app (https://github.com/elixir-webrtc/apps/tree/master/nexus).
Instead of automatically starting the stream, I am now running createPeerConnection() and joinChannel() without starting any local streams. I have then added a button that when pressed, should start the local webcam stream and broadcast it to other peers.
On button press I execute:...
High WebRTC CPU consumption
Hey! We are performing some benchmarks with ExWebRTC-based pipeline and on 4 CPU droplet (with dedicated cores) and 10 incoming streams consumes 100% of CPU.
Is that expected behaviour? Our pipeline is essentially consuming H264 video and decodes the AAC to Opus, nothing else.
The second question is - how do we trace the membrane elements CPU consumption? I was trying to https://hexdocs.pm/membrane_core/Membrane.Pipeline.html#module-visualizing-the-supervision-tree, but I doesn't see the pipeline at all in
:observer. The Live dashboard on the other hand lists the processes and I can sort by "Number of Reductions", but over there all elements is just Membrane.Core.Element so it's kind of makes it impossible to distinguish which process causes the most CPU consumption....Continious RTMP stream without constant output or changing output
Hi there,
I am wondering if it's possible to use membrane to do the following:
- We have camera's that are streaming RTMP continously to the server....
Testing a filter with flow control :auto?
I'm trying to test a membrane filter where the flow control is set to :auto. I'm using
Membrane.Testing.Source and passing in a custom generator function. Though it appears to be only called once. Am I setting this testing pipeline up incorrectly?RTSP push approach with Membrane.RTSP.Server
We are trying to add RTSP into media server, using Membrane. The main thing is that we need to implement push approach: Elixir TCP server starts listening for incoming RTSP connections from cameras, and then pushes the incoming RTSP video stream to the clients. We used Membrane.RTSP.Server with handler which handles announce, describe and record steps accordingly. On RECORD step, we are passing socket control to pipeline pid:
```elixir
Enum.each(tracks, fn {_, track} ->
options = [...
Get Video from RTSP and stream by RTMP
Hi guys, i'm build a stream video realtime through rtmp but my camera video source is from an rtsp link. i used Membrane.RTSP.Source but got stuck and many error. please help me, thanks you.
How to split a Raw Audio Buffer with 2 channels within frame into two different buffer
Hey team ! I'm trying to process an FLV stream with AAC codec for the audio, and the audio part has 2 channels that I would like to treat separately, is there a way to split my pipeline in order to handle the 2 channels differently?
Here is an overview of the pipeline:
```
child(:source, %Membrane.RTMP.Source{
socket: socket...
Logs are overrun with `Sending stream format through pad` messages. Am I doing something wrong ?
I have a simple pipeline for processing text. I am using
flow_control as auto for all elements in the pipeline besides the source which has flow_control set to push.
All elements (with the exception of the source have 1000s of messages of type
```
app-1 | [debug] <0.3808.0>/:some_name Sending stream format through pad :output...How to send control events upstream/downstream ?
Hi 👋
I am new to elixir and even newer to Membrane 🙂
I am trying to determine how to send events elements in the pipeline, which one or more other elements (upstream or downstream) could handle.
I came across https://hexdocs.pm/membrane_core/Membrane.Event.html , which links to https://hexdocs.pm/membrane_core/Membrane.Element.Action.html#t:event/0. Am I correct in understanding that control events also should be sent via pads (maybe creating custom pads that are not
input output but something like signal or control ?...Guidance on turning a low fps stream of jpegs into a video
Hi folks! I'm new to Membrane (about 3 hours in by now) and just looking for some pointers on where to go, so far I have a source receiving tcp packets from a 3d printer, and a filter parsing those into jpeg images. I'd essentially like to end up with a low fps video feed from these. Any pointers?
membrane_rtc_engine/membrane_rtc_engine_ex_webrtc error
Hi, while trying to use
membrane_rtc_engine with package membrane_rtc_engine_ex_webrtc I'm seeing there's a dependency mismatch.
Ie; the example at the bottom of this page (https://github.com/fishjam-cloud/membrane_rtc_engine/tree/master?tab=readme-ov-file#repository-structure):
```...Demuxing Safari MP4
Hi! I'm trying to use a MediaRecorder to record audio/mp4 on Safari, and then handle it using Membrane.
Membrane.MP4.Demuxer.ISOM gives me an error:
```
Error parsing MP4
box: moof / traf / tfhd...SDL plugin fails to initialize
Hi. I am trying to play udp stream via SDL sink but if fails to initialize.
I am on archlinux and using hyperland(wayland) which may be the cause of problem.
I have attached error and pipeline....
HTTP adaptive stream continuous segments
Hey there! I have a question regarding https://github.com/membraneframework/membrane_http_adaptive_stream_plugin library. Is there a way to configure the starting number for the segment, partial_segment or header? The use case is - we want to keep the segments, headers and partial segments counter continuous after restarting the stream.
Is that even possible?
Any points against such an approach?
...
Sections of files
I have a bunch of mp4 files sitting on disk and I'd like clients to be able to request arbitrary segments of them (e.g., starting 200 seconds in until 250s). I'm a beginner in any kind of digital video, is this even slightly viable with membrane somehow?
Pipeline Error: Pipeline Failed to Terminate within Timeout (5000ms)
This is a bit of a head scratcher for me. I'm in the process of writing a new element for my pipeline that uses the Silero VAD module for speech detection (rather than the built in WebRTC Engine VAD extension). I've got it working, but hitting a wierd bug. Now when my engine terminates (peer leaves), I'm getting this error:
** (Membrane.PipelineError) Pipeline #PID<0.1499.0> hasn't terminated within given timeout (5000 ms).
The only thing that's changed is my new element in the pipeline (it's setup as a Membrane.Filter). If I remove the element from the pipeline, then the error goes away.
...
burn in caption to mp4
Thanks first of all for building the whole family of products.
To learn Membrane & friends, I want to build a simple Livebook-based tool that starts with a video and its webVTTs (multilingual), generate the image sequence (with Image or Typst), then burn the image sequence captions into the video.
Is Membrane, Live Compositor, or Boombox better suited for this purpose?...