问题描述
- 我使用AVAssetReader解码HDR视频
fun main(){
val regex = Regex(pattern = """for\s\w:=\d|\w\sto\s\w|\d\sdo\nwrite(\w|\d);|writeln(\w|\d);""")
val matched = regex.containsMatchIn(input = "for i:=1 to n do\n write(n);")
if(matched) println("True")
else println("False")}
- 获得formatType为“ kCVPixelFormatType_30RGB”的CVPixelBuffer后,获得纹理数据如下
try
{
org.jsoup.nodes.Document doc = org.jsoup.Jsoup.connect
("https://elegant-jones-f4e94a.netlify.com/valid_doc.html").get();
String title = doc.title();
} catch
(Exception e)
{
System.out.println(title);
}
textview1.setText(title);
- MTKView和RenderPipleState的设置如下
self.asset = AVURLAsset(url: fileName)
do{
self.reader = try AVAssetReader(asset: self.asset)
let timeRange = CMTimeRangeFromTimetoTime(start: startTime,end: endTime)
self.reader.timeRange = timeRange
guard let track = self.asset.tracks(withMediaType: .video).first else{
fatalError("error")
}
self.track = track
let videoDecompressionSettings: [String: AnyObject] = [
String(kCVPixelBufferPixelFormatTypeKey): NSNumber(value: kCVPixelFormatType_30RGB)
]
self.videoOutput = AVAssetReaderTrackOutput(track: self.track,outputSettings: videoDecompressionSettings)
self.videoOutput.supportsRandomAccess = true
if self.reader.canAdd(self.videoOutput) {
self.reader.add(self.videoOutput)
}
self.reader.startReading()
}
catch{
print("Error setting up asset reader: \(error)")
fatalError("error")
}
var texture: CVMetalTexture? = nil
let status = CVMetalTextureCacheCreateTextureFromImage(kcfAllocatorDefault,textureCache!,self,nil,MTLPixelFormat.rgb10a2Unorm,width,height,&texture)
guard status == kCVReturnSuccess else {
return nil
}
guard let mtlTexture = CVMetalTextureGetTexture(texture!) else {
return nil
}
我在哪里错了?
解决方法
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