Streaming frame by frame from memory of a SEM

[Colloc]

Hello,

I try to stream video from a SEM (Scanning Electron Microscope) which delivers its frame directly in RAM.

But I can't find any MRL for this kind of data. I've found for screen//, dvd//, etc... not for frame coming from RAM.

How could I do that ?

Today, I send frame by TCP without any compression but the framerate is limited by the bandwidth. That's the reason why I try to use VLC to compress data. The frame size is from 512*384 to 3072*2304, 8bits/pixel.

I wrote my program in C/C++.

[Rémi Denis-Courmont]

Frankly, your description means noting. You can't just deliver frames into RAM. There has to be some API involved.

So then presumably, you need to write a VLC plugin that calls the API.

[Colloc]

I use the SEM API which delivers image data into memory. So I want to stream this data in a VLC stream. I can't find any way to do this.


I would do this :

Server side :
An image is available in RAM (with a frequency I can choose) => put this in a stream

Client side :
Use VLC to view the stream (it's easy with libvlc).

[Rémi Denis-Courmont]

Then whatever the "SEM API" is, you would need a VLC plugin that uses that API.

[Colloc]

I just want to know if it is possible to stream image from ram data with libvlc, I don't want a plugin but perhaps I need to write a specific module like "Memory Input" in access module ?

As :

Code: Select all

libvlc_vlm_add_broadcast(inst, "mybroad", "screen://", "#transcode{vcodec=h264, venc=x264,vb=0,scale=0, acodec=mpga,ab=128,channels=2, samplerate=44100}:http{mux=ffmpeg{mux=flv}, dst=:7777/}", 0, NULL, 1, 0);

I would use something as :

Code: Select all

libvlc_vlm_add_broadcast(inst, "mybroad", "RAM://", "#transcode{vcodec=h264, venc=x264,vb=0,scale=0, acodec=mpga,ab=128,channels=2, samplerate=44100}:http{mux=ffmpeg{mux=flv}, dst=:7777/}", 0, NULL, 1, 0);

and a callback function which put data in RAM. (I know that RAM:// doesn't exist...)

I'm just searching the way to add a different source of broadcast from RAM.

[Rémi Denis-Courmont]

Sorry but you are not making sense. I have already tried to explain twice. I can't say more.

[Colloc]

Ok, ok !

Could I have some explanation to develop a plugin to have a new stream input for libVLC ?

[Jean-Baptiste Kempf]

Use the imem API