[英]h 264 Hardware encoding /decoding For IOS(IPhone/Ipad)?
i have done Real time video processing in ios using AVFoundation framework , help of this link .i have tested it is working fine. 我已经使用AVFoundation框架在ios中完成了实时视频处理, 这个链接的帮助。我测试过它工作正常。 now i want to use h264 encoding and decoding[Before draw] .i try to get h264 encoded data from AVCaptureSession ,so i have set AVVideoCodecH264 in AVCaptureSession's videosetting,before Start capturing .
现在我想使用h264编码和解码[在绘制之前] .i尝试从AVCaptureSession获取h264编码数据,所以我在开始捕获之前在AVCaptureSession的视频设置中设置了AVVideoCodecH264。
NSDictionary* videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:value,key,AVVideoCodecH264,AVVideoCodecKey, nil];
NSDictionary * videoSettings = [NSDictionary dictionaryWithObjectsAndKeys:value,key,AVVideoCodecH264,AVVideoCodecKey,nil]; [captureOutput setVideoSettings:videoSettings];
[captureOutput setVideoSettings:videoSettings];
above code doesn't produce any change in output buffer,same buffer format get as like before. 上面的代码不会对输出缓冲区产生任何变化,同样的缓冲区格式就像之前一样。 how to accomplish my requirement ?
如何完成我的要求? is it possible ?
可能吗 ? if so Please Help me to getting started ,h264 in ios.
如果是这样请帮助我开始,在ios中使用h264。
There's no direct access to encoded keyframes. 无法直接访问已编码的关键帧。 You may found some insightful comments about that here: https://stackoverflow.com/questions/4399162/how-to-stream-live-video-from-iphone-to-a-media-server-like-wowza
您可以在此处找到一些有见地的评论: https : //stackoverflow.com/questions/4399162/how-to-stream-live-video-from-iphone-to-a-media-server-like-wowza
A pair AVVideoCodecH264, AVVideoCodecKey
may be used as parameters in outputSettings
in 一对
AVVideoCodecH264, AVVideoCodecKey
可以用作outputSettings
中的参数
NSError *error = nil;
NSDictionary *outputSettings = [NSDictionary dictionaryWithObjectsAndKeys:
AVVideoCodecH264, AVVideoCodecKey, nil];
AVAssetWriterInput *assetWriterInput = [[AVAssetWriterInput alloc]
initWithMediaType:AVMediaTypeVideo
outputSettings:outputSettings];
AVAssetWriter *assetWriter = [[AVAssetWriter alloc] initWithURL:fileURL
fileType:AVFileTypeMPEG4
error:&error];
if (!error && [assetWriter canAddInput:assetWriterInput])
[assetWriter addInput:assetWriterInput];
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