All stuff is coded from the scratch, even the web server and PNG generation.Īs suggested by Nominal Animal, I gave a try with using APNG. Please note, that the application is coded in plain C, without operating system or powerful libraries. And as there is also the potential firewall drawback, I think I prefer HTTP for transport.

I'd also read about thinks like SCTP, RTP and RTSP but it looks like more work to implement this on my target. (Maybe HTTP Live Streaming doing like this?) I could stream the video over HTTP (after received) by using chunked transfer encoding (each frame as an own chunk). I already have some tcp sockets open for listening on port 80. Note that my target system is very resource restricted in both memory and computing power.

(1) Which video format is the most easy to generate if I already have a PNG for each frame (but I have that PNG only for a couple of milliseconds and cannot buffer it for a longer time)? I'm not sure what's the best way to start with this. vlc.Īs my framebuffer bitmaps are built uncompressed, I expect a constant bitrate. Now for the next step, I want to provide the display content as some kind of video stream and then put appropriate html code to my index.html or just open that 'streaming URI' with e.g. each second so that the user can see changes of the display content. I also could write html / javascript code to update that picture periodically, e.g. So I can receive snapshots by e.g.: wget or wget or put appropriate html code into the controller's index.html to view that in a web browser. There is a tiny webserver implemented, which provides the respective frame buffer content (equals to led matrix display content) as PNG or BMP for download (both uncompressed because of CPU load and 1 Bit color depth). 160 × 32 pixel, 1 bit color depth (each led can be just either on or off). It generates display information with about about 41 fps and configurable display size of e.g.

The application's main job is to control a led matrix display for public traffic passenger information. I have a bare-metal application running on a tiny 16 bit microcontroller ( ST10) with 10BASE-T Ethernet (CS8900) and a Tcp/IP implementation based upon the EasyWeb project.

Vlc for mac os x 10.3.3