简短的问题：
如何从播放 youtube 视频的 axShockwavePlayer 中获取事件？
（“视频播放”和“暂停”等事件）
长问题：
我有一个带有冲击波播放器的 winforms 应用程序。
我在其中播放 youtube 视频，我想知道是否可以在我的应用程序中与 youtube 播放器进行交互。
我正在尝试获取播放器的状态并根据它更改我的背景音乐。
环顾四周，我发现了这个问题： How to control the youtube flash player with c#? 和很好的 答案。
（均来自 2012 年）
玩弄它，我发现答案似乎太旧了，对我不起作用。
发布的答案包括简单的调试，这就是我点击播放器（并开始播放视频）得到的：
ytbPlayer FlashCall: raw: <invoke name="isNaN" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "isNaN()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="
(function() {
try {
yt.www.watch.ads.checkInit();
return true;
} catch (e) {
window['adModuleLoaded'] = true;
return false;
}
})" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "
(function() {
try {
yt.www.watch.ads.checkInit();
return true;
} catch (e) {
window['adModuleLoaded'] = true;
return false;
}
})()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="googletag.cmd.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "googletag.cmd.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="googleGetCompanionAdSlots" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "googleGetCompanionAdSlots()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="google_get_companion_slot_params" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "google_get_companion_slot_params()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.height.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.height.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.width.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.width.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="navigator.javaEnabled" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "navigator.javaEnabled()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.history.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.history.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.availHeight.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.availHeight.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.availWidth.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.availWidth.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.colorDepth.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.colorDepth.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.navigator.plugins.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.navigator.plugins.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.navigator.mimeTypes.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.navigator.mimeTypes.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="yt.util.activity.getTimeSinceActive" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "yt.util.activity.getTimeSinceActive()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="google_show_companion_ad" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "google_show_companion_ad()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="Goog_AdSense_Lidar_sendVastMessage" returntype="xml"><arguments><string>expandedChanged</string><string>741024059.2435002</string><object><property id="opt_bounds"><object><property id="width
"><number>431</number></property><property id="height"><number>62</number></property><property id="expanded"><false/></property><property id="left"><number>20</number></property><property id="top"><number>128</number></property></o
bject></property></object></arguments></invoke>
ytbPlayer_FlashCall: "Goog_AdSense_Lidar_sendVastMessage(expandedChanged741024059.24350024316220128)
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="Goog_AdSense_Lidar_getUrlSignalsList" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "Goog_AdSense_Lidar_getUrlSignalsList()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="Goog_AdSense_Lidar_sendVastMessage" returntype="xml"><arguments><string>expandedChanged</string><string>741024059.2435002</string><object><property id="opt_fullscreen"><false/></property><pro
perty id="opt_bounds"><object><property id="width"><number>431</number></property><property id="height"><number>62</number></property><property id="expanded"><true/></property><property id="left"><number>20</number></property><prop
erty id="top"><number>128</number></property></object></property></object></arguments></invoke>
ytbPlayer_FlashCall: "Goog_AdSense_Lidar_sendVastMessage(expandedChanged741024059.24350024316220128)
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="googletag.cmd.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "googletag.cmd.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="googleGetCompanionAdSlots" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "googleGetCompanionAdSlots()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="google_get_companion_slot_params" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "google_get_companion_slot_params()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.height.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.height.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.width.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.width.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="navigator.javaEnabled" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "navigator.javaEnabled()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.history.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.history.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.availHeight.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.availHeight.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.availWidth.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.availWidth.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.screen.colorDepth.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.screen.colorDepth.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.navigator.plugins.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.navigator.plugins.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.navigator.mimeTypes.length.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.navigator.mimeTypes.length.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="yt.util.activity.getTimeSinceActive" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "yt.util.activity.getTimeSinceActive()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.top.location.href.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.top.location.href.toString()
YTplayer_FlashCall: unknownCommand
ytbPlayer FlashCall: raw: <invoke name="window.document.referrer.toString" returntype="xml"><arguments></arguments></invoke>
ytbPlayer_FlashCall: "window.document.referrer.toString()
YTplayer_FlashCall: unknownCommand
这是我使用的代码：
private void ytbPlayer_FlashCall(object sender, AxShockwaveFlashObjects._IShockwaveFlashEvents_FlashCallEvent e) //asigned as an event handler for FlashCall
{
Console.Write("ytbPlayer FlashCall: raw: " + e.request.ToString() + "\r\n");
// message is in xml format so we need to parse it
XmlDocument document = new XmlDocument();
document.LoadXml(e.request);
// get attributes to see which command flash is trying to call
XmlAttributeCollection attributes = document.FirstChild.Attributes;
String command = attributes.Item(0).InnerText;
// get parameters
XmlNodeList list = document.GetElementsByTagName("arguments");
List<string> listS = new List<string>();
foreach (XmlNode l in list)
{
listS.Add(l.InnerText);
}
Console.Write("ytbPlayer_FlashCall: \"" + command.ToString() + "(" + string.Join(",", listS) + ")\r\n");
// Interpret command
switch (command)
{
case "onYouTubePlayerReady": YTready(listS[0]); break;
case "YTStateChange": YTStateChange(listS[0]); break;
case "YTError": YTStateError(listS[0]); break;
default: Console.Write("YTplayer_FlashCall: unknownCommand\r\n"); break;
}
}
private string ytbPlayer_CallFlash(string ytFunction)
{
string flashXMLrequest = "";
string response = "";
string flashFunction = "";
List<string> flashFunctionArgs = new List<string>();
Regex func2xml = new Regex(@"([a-z][a-z0-9]*)(\(([^)]*)\))?", RegexOptions.Compiled | RegexOptions.IgnoreCase);
Match fmatch = func2xml.Match(ytFunction);
if (fmatch.Captures.Count != 1)
{
Console.Write("bad function request string");
return "";
}
flashFunction = fmatch.Groups[1].Value.ToString();
flashXMLrequest = "<invoke name=\"" + flashFunction + "\" returntype=\"xml\">";
if (fmatch.Groups[3].Value.Length > 0)
{
flashFunctionArgs = parseDelimitedString(fmatch.Groups[3].Value);
if (flashFunctionArgs.Count > 0)
{
flashXMLrequest += "<arguments><string>";
flashXMLrequest += string.Join("</string><string>", flashFunctionArgs);
flashXMLrequest += "</string></arguments>";
}
}
flashXMLrequest += "</invoke>";
try
{
Console.Write("YTplayer_CallFlash: \"" + flashXMLrequest + "\"\r\n");
response = ytbPlayer.CallFunction(flashXMLrequest);
Console.Write("YTplayer_CallFlash_response: \"" + response + "\"\r\n");
}
catch
{
Console.Write("YTplayer_CallFlash: error \"" + flashXMLrequest + "\"\r\n");
}
return response;
}
private static List<string> parseDelimitedString(string arguments, char delim = ',')
{
bool inQuotes = false;
bool inNonQuotes = false;
int whiteSpaceCount = 0;
List<string> strings = new List<string>();
StringBuilder sb = new StringBuilder();
foreach (char c in arguments)
{
if (c == '\'' || c == '"')
{
if (!inQuotes)
inQuotes = true;
else
inQuotes = false;
whiteSpaceCount = 0;
}
else if (c == delim)
{
if (!inQuotes)
{
if (whiteSpaceCount > 0 && inQuotes)
{
sb.Remove(sb.Length - whiteSpaceCount, whiteSpaceCount);
inNonQuotes = false;
}
strings.Add(sb.Replace("'", string.Empty).Replace("\"", string.Empty).ToString());
sb.Remove(0, sb.Length);
}
else
{
sb.Append(c);
}
whiteSpaceCount = 0;
}
else if (char.IsWhiteSpace(c))
{
if (inNonQuotes || inQuotes)
{
sb.Append(c);
whiteSpaceCount++;
}
}
else
{
if (!inQuotes) inNonQuotes = true;
sb.Append(c);
whiteSpaceCount = 0;
}
}
strings.Add(sb.Replace("'", string.Empty).Replace("\"", string.Empty).ToString());
return strings;
}
private void YTready(string playerID)
{
//YTState = true;
//start eventHandlers
ytbPlayer_CallFlash("addEventListener(\"onStateChange\",\"YTStateChange\")");
ytbPlayer_CallFlash("addEventListener(\"onError\",\"YTError\")");
}
private void YTStateChange(string YTplayState)
{
switch (int.Parse(YTplayState))
{
case -1: gm_Name.Text = "not started"; break; //not started yet
case 1: Console.WriteLine("playing"); break; //playing
case 2: Console.WriteLine("paused"); break; //paused
//case 3: ; break; //buffering
case 0: Console.WriteLine("YOU"); break; //ended
}
}
private void YTStateError(string error)
{
Console.Write("YTplayer_error: " + error + "\r\n");
}
查看调试代码，我发现没有任何关键字可以让我知道用户点击了冲击波播放器。
如何更改代码以匹配当前的 youtube api？