Only get part of blob

[ghost]

Hi, I've used your code to create a streaming desktop system using the following ffmpeg child process in node server: var ffmpeg = require('child_process').spawn("ffmpeg", [ "-f", "avfoundation", "-i", "1:0", "-q:v", "31", "-r", "10", "-f", "mjpeg", "pipe:1" ]);

and on the stdout.on('data') function I broadcast it to my web socket as follows: var frame = new Buffer(data).toString('base64');
ws.broadcast(frame, {binary:false});

when the canvas updates on receiving of the web socket data, it only draws the first top 100 pixels, any clues ? It looks like the frame it not complete ?