There is apparently no easy way to stream images in Raspberry Pi. While there are many hacks available, in my Raspberry Pi Zero it has some trouble keeping a decent framerate.
I suspect one of the main problems is that the 1st Google solution and most of them writes/reads to the SD for each image. I've got so far to read from the terminal an image without touching the SD:
const out = await exec(`fswebcam -r 640x480 -`);
const img = out[0];
console.log(img);
This gives me this on the terminal:
����JFIF``��>CREATOR: gd-jpeg v1.0 (using IJG JPEG v80), default quality
��
$.' ",#(7),01444'9=82<.342��C
And many more. Previously I was doing something similar with buffers:
const file = fs.readFileSync(temp);
console.log(file.toString('base64'));
ctx.socket.emit('frame', { image: true, buffer: file.toString('base64') });
Where file
is a Buffer and file.toString('base64')
is a string in the form of:
/9j/4AAQSkZJRgABAQEAYABgAAD//gA8Q1JFQVRPUjogZ2QtanBlZyB2MS4wICh1c2luZyBJSkcgSlBFRyB2ODApLCBxdWFsaXR5ID0gMTAwCv ...
And this worked (but through the SD card). So my question is, what is the format of the first output in terminal? And how can I convert it to a Buffer or a String similar to the latter.
via Francisco Presencia
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