我正在将Android手机的RTP视频数据发送到我的电脑。 RTP流式传输有效，已通过UITextFields验证。
现在我尝试接收并在Chrome中显示流（63.0.3239.84，Win10,64Bit）。我收到Unable to simultaneously satisfy constraints.
Probably at least one of the constraints in the following list is one you don't want.
Try this:
(1) look at each constraint and try to figure out which you don't expect;
(2) find the code that added the unwanted constraint or constraints and fix it.
(
"<NSLayoutConstraint:0x1d02966c0 'UISV-canvas-connection' UIStackView:0x102c6d820.leading == UIInputSwitcherTableCellSegmentView:0x102c6df20.leading (active)>",
"<NSLayoutConstraint:0x1d0296760 'UISV-canvas-connection' H:[UIInputSwitcherTableCellSegmentView:0x102c6fc00]-(0)-| (active, names: '|':UIStackView:0x102c6d820 )>",
"<NSLayoutConstraint:0x1d0296800 'UISV-fill-equally' UIInputSwitcherTableCellSegmentView:0x102c6efd0.width == UIInputSwitcherTableCellSegmentView:0x102c6df20.width (active)>",
"<NSLayoutConstraint:0x1d02968f0 'UISV-fill-equally' UIInputSwitcherTableCellSegmentView:0x102c6fc00.width == UIInputSwitcherTableCellSegmentView:0x102c6df20.width (active)>",
"<NSLayoutConstraint:0x1d02967b0 'UISV-spacing' H:[UIInputSwitcherTableCellSegmentView:0x102c6df20]-(9)-[UIInputSwitcherTableCellSegmentView:0x102c6efd0] (active)>",
"<NSLayoutConstraint:0x1d02968a0 'UISV-spacing' H:[UIInputSwitcherTableCellSegmentView:0x102c6efd0]-(9)-[UIInputSwitcherTableCellSegmentView:0x102c6fc00] (active)>",
"<NSLayoutConstraint:0x1d0295860 'UIView-Encapsulated-Layout-Width' UIStackView:0x102c6d820.width == 0 (active)>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x1d02968a0 'UISV-spacing' H:[UIInputSwitcherTableCellSegmentView:0x102c6efd0]-(9)-[UIInputSwitcherTableCellSegmentView:0x102c6fc00] (active)>
的RTP数据包，并在ffplay的帮助下将其传递给所有已连接的用户。
要在HTML5 node.js - 代码中显示视频，我尝试了与MediaSource API的the example in the docs类似的方法。这就是我试图即时添加视频数据的内容：
socket.io<video>
但是，我的视频对象没有任何错误。如果我在var socket = io();
var ms = new MediaSource();
var mimeCodec = 'video/mp4; codecs="avc1.42C01E"';
var queue = [];
var video = document.querySelector('video');
// receiving the rtp-packets from android, forwarded by nodes socket.io
socket.on('video-fragment', function(fragment) {
queue.push(fragment.slice(11)); // cutting of rtp header to get plain NAL units
});
video.src = URL.createObjectURL(ms);
var timeout = 500;
var appendChunk = function() {
if(queue.length > 0) {
timeout = 500;
var append = function() {
var sb = ms.addSourceBuffer(mimeCodec);
sb.appendBuffer(queue.shift());
sb.addEventListener('updateend', function() {
if(video.paused) {
console.log("try to start video");
video.play();
}
appendChunk();
});
ms.removeSourceBuffer(sb);
};
if(ms.readyState == "open") {
append();
} else {
ms.addEventListener('sourceopen', function() {
appendChunk();
});
}
} else {
setTimeout(appendChunk, timeout); // try again after some timeout...
timeout *= 2;
}
}
appendChunk(); // start recursive call某处关闭MediaSource并尝试在此之后启动视频，则会收到代码为<video></video>的MediaError。
有什么建议吗？我是不是以正确的方式？或者这种视频流在Chrome中是不可能的，也是“直播”的唯一方式。是使用播放列表和视频文件块吗？
答案 0 :(得分：0)
浏览器仅支持mp4（或webm）容器中的视频。它不支持rtp协议。必须将其重新打包为浏览器支持的格式。