Tout d'abord, je dois mentionner que je suis un nouveau (iOS et Xamarin). J'essaie de filigraner une vidéo en utilisant une image et un texte.Xamarin.iOS - ExportAsynchronously échoue
J'ai porté la majeure partie du code du lien: https://stackoverflow.com/a/22016800/5275669.
est collé Le code complet ici:
try {
var videoAsset = AVUrlAsset.FromUrl (new NSUrl (filepath, false)) as AVUrlAsset;
AVMutableComposition mixComposition = AVMutableComposition.Create();
var compositionVideoTracks = mixComposition.AddMutableTrack (AVMediaType.Video, 0);
AVAssetTrack clipVideoTrack = videoAsset.TracksWithMediaType (AVMediaType.Video) [0];
var compositionAudioTrack = mixComposition.AddMutableTrack (AVMediaType.Audio, 0);
AVAssetTrack clipAudioTrack = videoAsset.TracksWithMediaType (AVMediaType.Audio) [0];
NSError error;
CMTimeRange timeRangeInAsset = new CMTimeRange();
timeRangeInAsset.Start = CMTime.Zero;
timeRangeInAsset.Duration = videoAsset.Duration;
compositionVideoTracks.InsertTimeRange (timeRangeInAsset, clipVideoTrack, CMTime.Zero, out error);
compositionVideoTracks.InsertTimeRange (timeRangeInAsset, clipAudioTrack, CMTime.Zero, out error);
compositionVideoTracks.PreferredTransform = clipVideoTrack.PreferredTransform;
CGSize sizeOfVideo = videoAsset.NaturalSize;
CATextLayer textOfvideo = (CATextLayer)CATextLayer.Create();
textOfvideo.String = String.Format ("{0} {1}", DateTime.Now.ToLongTimeString(), "Test app");
textOfvideo.SetFont (CGFont.CreateWithFontName ("Helvetica"));
textOfvideo.FontSize = 50;
textOfvideo.AlignmentMode = CATextLayer.AlignmentCenter;
textOfvideo.Frame = new CGRect (0, 0, sizeOfVideo.Width, sizeOfVideo.Height/6);
textOfvideo.ForegroundColor = new CGColor (255, 0, 0);
UIImage myImage = UIImage.FromFile ("Icon-Small.png");
CALayer layerCa = CALayer.Create();
layerCa.Contents = myImage.CGImage;
layerCa.Frame = new CGRect (0, 0, 100, 100);
layerCa.Opacity = 0.65F;
CALayer optionalLayer = CALayer.Create();
optionalLayer.AddSublayer (textOfvideo);
optionalLayer.Frame = new CGRect (0, 0, sizeOfVideo.Width, sizeOfVideo.Height);
optionalLayer.MasksToBounds = true;
CALayer parentLayer = CALayer.Create();
CALayer videoLayer = CALayer.Create();
parentLayer.Frame = new CGRect (0, 0, sizeOfVideo.Width, sizeOfVideo.Height);
videoLayer.Frame = new CGRect (0, 0, sizeOfVideo.Width, sizeOfVideo.Height);
parentLayer.AddSublayer (videoLayer);
parentLayer.AddSublayer (layerCa);
parentLayer.AddSublayer (textOfvideo);
AVMutableVideoComposition videoComposition = AVMutableVideoComposition.Create();
videoComposition.RenderSize = sizeOfVideo;
videoComposition.FrameDuration = new CMTime (1, 30);
videoComposition.AnimationTool = AVVideoCompositionCoreAnimationTool.FromLayer (videoLayer, parentLayer);
AVMutableVideoCompositionInstruction instruction = AVMutableVideoCompositionInstruction.Create() as AVMutableVideoCompositionInstruction;
CMTimeRange timeRangeInstruction = new CMTimeRange();
timeRangeInstruction.Start = CMTime.Zero;
timeRangeInstruction.Duration = mixComposition.Duration;
instruction.TimeRange = timeRangeInstruction;
AVAssetTrack videoTrack = mixComposition.TracksWithMediaType (AVMediaType.Video) [0];
AVMutableVideoCompositionLayerInstruction layerInstruction = AVMutableVideoCompositionLayerInstruction.FromAssetTrack (videoTrack);
instruction.LayerInstructions = new AVVideoCompositionLayerInstruction[] { layerInstruction };
List<AVVideoCompositionInstruction> instructions = new List<AVVideoCompositionInstruction>();
instructions.Add (instruction);
videoComposition.Instructions = instructions.ToArray();
var exportSession = new AVAssetExportSession (mixComposition, AVAssetExportSession.PresetMediumQuality);
exportSession.VideoComposition = videoComposition;
Console.WriteLine ("Original path is {0}", filepath);
string newFileName = Path.GetFileName (filepath);
newFileName = newFileName.Replace (".mp4", "_wm.mp4");
string directoryName = Path.GetDirectoryName (filepath);
string videoOutFilePath = Path.Combine (directoryName, newFileName);
Console.WriteLine ("New path is {0}", videoOutFilePath);
exportSession.OutputFileType = AVFileType.Mpeg4;
exportSession.OutputUrl = NSUrl.FromFilename (videoOutFilePath);
exportSession.ShouldOptimizeForNetworkUse = true;
exportSession.ExportAsynchronously (() => {
AVAssetExportSessionStatus status = exportSession.Status;
Console.WriteLine ("Done with handler. Status: " + status.ToString());
switch (status) {
case AVAssetExportSessionStatus.Completed:
Console.WriteLine ("Sucessfully Completed");
if (File.Exists (videoOutFilePath)) {
Console.WriteLine ("Created!!");
} else
Console.WriteLine ("Failed");
break;
case AVAssetExportSessionStatus.Cancelled:
break;
case AVAssetExportSessionStatus.Exporting:
break;
case AVAssetExportSessionStatus.Failed:
Console.WriteLine ("Task failed => {0}", exportSession.Error);
Console.WriteLine (exportSession.Error.Description);
break;
case AVAssetExportSessionStatus.Unknown:
break;
case AVAssetExportSessionStatus.Waiting:
break;
default:
break;
}
});
if (File.Exists (videoOutFilePath))
return videoOutFilePath;
} catch (Exception ex) {
Console.WriteLine ("Error occured : {0}", ex.Message);
}
Je continue à obtenir l'erreur suivante: La tâche a échoué => Impossible de terminer l'exportation Erreur de domaine = code AVFoundationErrorDomain = -11820 "Impossible de terminer l'exportation" UserInfo = 0x18896070 {NSLocalizedRecoverySuggestion = Essayez exporter à nouveau., NSLocalizedDescription = Impossible de terminer l'exportation}
Si je remplace cette
var exportSession = new AVAssetExportSession (mixComposition, AVAssetExportSession.PresetMediumQuality);
avec
var exportSession = new AVAssetExportSession (videoAsset, AVAssetExportSession.PresetMediumQuality);
il fonctionne très bien, mais sans filigrane
Quelqu'un peut-il aider à cela ??