创建 MJPEG 查看器 Iphone
我正在尝试用 Objective C 制作一个 MJPEG 查看器，但我遇到了很多问题。
首先，我使用 AsyncSocket(http://code.google.com/p/cocoaasyncsocket/ ），这让我可以连接到主机。
这是到目前为止我
NSLog(@"Ready");
asyncSocket = [[AsyncSocket alloc] initWithDelegate:self];
//http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi
NSError *err = nil;
if(![asyncSocket connectToHost:@"kamera5.vfp.slu.se" onPort:80 error:&err])
{
NSLog(@"Error: %@", err);
}
在 didConnectToHost 方法中得到的内容：
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
NSLog(@"Accepted client %@:%hu", host, port);
NSString *urlString = [NSString stringWithFormat:@"http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi"];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"GET"];
//set headers
NSString *_host = [NSString stringWithFormat:host];
[request addValue:_host forHTTPHeaderField: @"Host"];
NSString *KeepAlive = [NSString stringWithFormat:@"300"];
[request addValue:KeepAlive forHTTPHeaderField: @"Keep-Alive"];
NSString *connection = [NSString stringWithFormat:@"keep-alive"];
[request addValue:connection forHTTPHeaderField: @"Connection"];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"Response Code: %d", [urlResponse statusCode]);
if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300) {
NSLog(@"Response: %@", result);
//here you get the response
}
}
这会调用 MJPEG 流，但不会调用它来获取更多数据。我认为它所做的只是加载第一块数据，然后断开连接。
我这样做是完全错误的还是隧道尽头有光明？
谢谢！
I'm trying to make a MJPEG viewer in Objective C but I'm having a bunch of issues with it.
First off, I'm using AsyncSocket(http://code.google.com/p/cocoaasyncsocket/) which lets me connect to the host.
Here's what I got so far
NSLog(@"Ready");
asyncSocket = [[AsyncSocket alloc] initWithDelegate:self];
//http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi
NSError *err = nil;
if(![asyncSocket connectToHost:@"kamera5.vfp.slu.se" onPort:80 error:&err])
{
NSLog(@"Error: %@", err);
}
then in the didConnectToHost method:
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
NSLog(@"Accepted client %@:%hu", host, port);
NSString *urlString = [NSString stringWithFormat:@"http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi"];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"GET"];
//set headers
NSString *_host = [NSString stringWithFormat:host];
[request addValue:_host forHTTPHeaderField: @"Host"];
NSString *KeepAlive = [NSString stringWithFormat:@"300"];
[request addValue:KeepAlive forHTTPHeaderField: @"Keep-Alive"];
NSString *connection = [NSString stringWithFormat:@"keep-alive"];
[request addValue:connection forHTTPHeaderField: @"Connection"];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(@"Response Code: %d", [urlResponse statusCode]);
if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300) {
NSLog(@"Response: %@", result);
//here you get the response
}
}
This calls the MJPEG stream, but it doesn't call it to get more data. What I think its doing is just loading the first chunk of data, then disconnecting.
Am I doing this totally wrong or is there light at the end of this tunnel?
Thanks!
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尝试在 UiWebView 中加载 mjpeg，它应该能够本地播放。
假设你有一个名为“myWebView”的 UiWebView，类似这样的东西应该可以工作：
我希望有帮助！
Try loading the mjpeg in a UiWebView, it should be able to play it natively.
Assuming you have a UiWebView called "myWebView", something like this should work:
I hope that helps!
主要问题是 webkit 从不释放数据，所以一段时间后它就会爆炸。
the main problem is that webkit never relase the data, so after a while it explode.
这可能最好使用 JavaScript 来完成，因为否则没有与 UIWebView 通信的好方法。
That would probably best be done with JavaScript since there isn't a good way to communicate with UIWebView otherwise.