去年11月份開始來到這家新公司，做視頻監控的
而我負責做WEB觀看端，之前是說視頻播放用flash來做，然後界面的話直接用原生的HTML
後來就溫習了CSS js jq ajax...... 還有dwr
也做了一個類似的小Demo出來，當然沒什麼功能，只能播放rtmp視頻流而已
後來今年回來說都用Flex做，到現在3 、4個月了，功能差不多實現了
還差一個視頻截圖加一個視頻錄像的功能，昨天開始做截圖，網上找方法，還挺簡單的
但是應用到視頻截圖就報錯了：
SecurityError: Error #2123: 安全沙箱衝突:BitmapData.draw: XXX 不能訪問 rtmp://XXXXX。未被授權訪問任何策略文件。
網上也很多人遇到這個問題，說的方法但是都沒有解決我的問題
由於我們的視頻服務器是用Crtmpserver，網上的解決辦法大多是FMS的
就在今天中午，無意間再次谷歌了下錯誤，找到一個人跟我的一模一樣的實現方式，和同樣的錯誤
https://groups.google.com/forum/#!msg/c-rtmp-server/aACuxdF0Azw/mzkphlQHYeoJ
我把解決辦法摘抄上來
That worked beautifully, though I had to do a little more work then
that.
in void BaseOutNetRTMPStream::SignalAttachedToInStream(), I added the
following code after stream begin to allow Video samples:
+ //XXX. notify |RtmpSampleAccess
+ /*
+ message = StreamMessageFactory::GetNotifyRtmpSampleAccess(
+ _pChannelVideo->id, _rtmpStreamId, absoluteTimestamp, false, true,
true);
+ TRACK_MESSAGE("Message:\n%s", STR(message.ToString()));
+ if (!_pRTMPProtocol->SendMessage(message)) {
+ FATAL("Unable to send message");
+ _pRTMPProtocol->EnqueueForDelete();
+ return false;
+ }
+ */
+
Also in the same method, changed the same call for the audio channel:
//10. notify |RtmpSampleAccess
message = StreamMessageFactory::GetNotifyRtmpSampleAccess(
_pChannelAudio->id, _rtmpStreamId, 0, true, true, true);
TRACK_MESSAGE("Message:\n%s", STR(message.ToString()));
if (!_pRTMPProtocol->SendMessage(message)) {
FATAL("Unable to send message");
_pRTMPProtocol->EnqueueForDelete();
return;
}
This works perfectly to get Flash BitmapData.draw() to work on the
RTMP stream. I suggest this be integrated as a configuration option to
each application so it would be possible to do something like from the
app configuration:
{
description="FLV Playback Sample",
name="flvplayback",
protocol="dynamiclinklibrary",
aliases=
{
"simpleLive",
"vod",
"live",
"WeeklyQuest",
"SOSample",
"oflaDemo",
},
acceptors =
{
{
ip="0.0.0.0",
port=1935,
protocol="inboundRtmfp"
},
{
ip="0.0.0.0",
port=6666,
protocol="inboundLiveFlv",
waitForMetadata=true,
},
{
ip="0.0.0.0",
port=9999,
protocol="inboundTcpTs"
},
--[[{
ip="0.0.0.0",
port=554,
protocol="inboundRtsp"
},]]--
},
externalStreams =
{
validateHandshake=true,
keyframeSeek=true,
seekGranularity=1.5, --in seconds, between 0.1 and 600
clientSideBuffer=12, --in seconds, between 5 and 30
allowVideoSampleAccess=true,
allowAudioSampleAccess=true,
},
A big thanks for pointing me in the right direction!
上面是那位外國仁兄解決辦法:特此記錄下（就是把上面加粗的代碼放到你的視頻服務器代碼中，具體我不清楚，我不會C++）
剩下最後一個 視頻錄像的功能了，唉不知道怎麼實現
