What does HackerNews think of jsmpeg?

>Today, there is a Python package for everything.

The same could be said about CPAN and NPM. Yet Perl is basically dead and JavaScript isn't used for any machine learning tasks as far as I'm aware. WebAssembly did help bring a niche array of audio and video codecs to the ecosystem[1][2], something I'm yet to see from Python.

I don't use Python, but with what little exposure I've had to it at work, its overall sluggish performance and need to set up a dozen virtualenvs -- only to dockerize everything in cursed ways when deploying -- makes me wonder how or why people bother with it at all beyond some 5-line script. Then again, Perl used to be THE glue language in the past and mod_perl was as big as FastAPI, and Perl users would also point out how CPAN was unparalleled in breadth and depth. I wonder if Python will follow a similar fate as Perl. One can hope :-)

[1] https://github.com/phoboslab/jsmpeg

[2] https://github.com/brion/ogv.js/

Similar situation here, ended up with the same solution, after an initial attempt with HLS. jsmpeg (https://github.com/phoboslab/jsmpeg) made it pretty easy.

I'm self employed. Some of my projects (mostly Ejecta[1] and jsmpeg[2]) spawned a lot of contract and consulting work lately. I'm also selling licenses for my games[3] so other gaming sites can host them and the AdSense banner on ZType[4] provided an impressively stable ~$500/mo for the past few years.

[1] https://github.com/phoboslab/Ejecta

[2] https://github.com/phoboslab/jsmpeg

[3] http://phoboslab.org/#games

[4] http://zty.pe/

You could already make video codecs in JS, or in C using asm.js. It is absolutely realistic; see for instance the jsmpeg project: https://github.com/phoboslab/jsmpeg.

It is unlikely to ever compete battery-wise with hardware support for a codec, however.

Shameless plug: check out jsmpeg[1] - it's an MPEG1 decoder written in JavaScript that's capable of low latency streaming via WebSockets, weighs only ~25kb gzipped, offloads part of the decoding to the GPU via WebGL and runs smoothly on an iPhone4.

Of course it has some drawbacks, as MPEG1 is a pretty old codec. The data rate is fairly high and it struggles with high resolution streams. 720p still decodes nicely in realtime on most mobile devices, though.

[1] https://github.com/phoboslab/jsmpeg

Thanks, I'll have a look!

I can't use WebRTC yet because I want to have support for IE and especially Safari & Mobile Safari. I want to add audio for an iOS App[1] that's using jsmpeg[2] for video streaming.

[1] http://instant-webcam.com/

[2] https://github.com/phoboslab/jsmpeg

"Terrible" is taking it a bit far. This is basically a prototype and certainly has potential.

> This completely disregards anything motion estimation

A good xng encoder could work around this by doing the motion estimation and encoding transparent regions where things don't change on subsequent frames which could reduce file size dramatically.

There's no question that for longer video clips, a native format like mpeg4 will outperform, especially on mobile. This XNG thing does play smoothly on my iPhone 5s with iOS 8 however.

> Using canvas with JavaScript to render something akin to simple MPEG

This has been done and jsmpeg is one such implementation - https://github.com/phoboslab/jsmpeg

Live demo here: http://stream.imdeity.com [ The macro blocks/visual glitches in that demo are a result of the live capture/encoding via ffmpeg and not a jsmpeg problem ]

The downside with the jsmpeg approach is that it requires accompanying Javascript to work and won't animate as a standalone file unlike this XNG method.

> 60% CPU usage and a memory leak pushing my Chrome past a GB and that's just the start of it.

Seeing high memory use on my Chrome as well but only 8% CPU usage with the multiple XNGs on that page playing at the same time (which is about the same as a single Flash-based Youtube video playing in another tab).

Again, definitely not production ready but has high potential when paired with a good encoder.

you can use javascript mpeg1 decoder instead of \nyou get auto playing animated mpeg files instead of gif\nmpeg is pretty much jpeg stream with bonus I frames

https://github.com/phoboslab/jsmpeg

example:

http://phoboslab.org/log/2013/05/mpeg1-video-decoder-in-java...

Thank you! The author really deserves the credit here, we love how well it works. https://github.com/phoboslab/jsmpeg