会有猫的 gonejack

使用ffmpeg合并MP4文件

ffmpeg -i "Apache Sqoop Tutorial Part 1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts
ffmpeg -i "Apache Sqoop Tutorial Part 2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate2.ts
ffmpeg -i "Apache Sqoop Tutorial Part 3.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate3.ts
ffmpeg -i "Apache Sqoop Tutorial Part 4.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate4.ts
ffmpeg -i "concat:intermediate1.ts|intermediate2.ts|intermediate3.ts|intermediate4.ts" -c copy -bsf:a aac_adtstoasc "Apache Sqoop Tutorial.mp4"

	Install Homebrew OS X package manager:
	/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

	Install ffmpeg with x265 support:
	brew install ffmpeg --with-fdk-aac --with-sdl2 --with-freetype --with-libass --with-libvorbis --with-libvpx --with-opus --with-x265

	Convert video to x265:
	ffmpeg -i input -c:v libx265 -preset medium -crf 28 -c:a aac -b:a 128k output.mp4

	Uninstall ffmpeg:

	console.clear();
	var img = new Image();
	img.src = 'img/img.png';
	img.onload = function () {
	var canvas = document.createElement('canvas'), context = canvas.getContext('2d');
	canvas.width = img.width;
	canvas.height = img.height;
	context.drawImage(img, 0, 0, img.width, img.height);

	console.log(canvas.toDataURL('image/png'));

	// hard won knowledge from http://stackoverflow.com/questions/20035615/using-raw-image-data-from-ajax-request-for-data-uri
	var xmlHTTP = xhr.XMLHttpRequest();
	xmlHTTP.open('GET', url, true);
	xmlHTTP.responseType = 'arraybuffer';
	xmlHTTP.onload = function(e) {
	var arr = new Uint8Array(this.response);
	var raw = String.fromCharCode.apply(null,arr);
	var b64 = base64.encode(raw);
	var dataURL="data:image/png;base64," + b64;
	};

	source /usr/local/go/src/pkg/runtime/runtime-gdb.py
	b main.main