iOS Development videos Get the first frame picture from the URL to get any frame picture

+ (uiimage*) thumbnailimageforvideo: (nsurl *) Videourl attime: (nstimeinterval) Time {  Avurlasset *asset = [[Avurlasset alloc] initwithurl:videourl options: nil];

Nsparameterassert (asset);

　　Avassetimagegenerator *assetimagegenerator =[[avassetimagegenerator alloc] Initwithasset:asset];

Assetimagegenerator. appliespreferredtracktransform = YES;

Assetimagegenerator. Aperturemode = Avassetimagegeneratoraperturemodeencodedpixels;

Cgimageref thumbnailimageref = NULL;

Cftimeinterval thumbnailimagetime = time;

　　Nserror *thumbnailimagegenerationerror = nil;

Thumbnailimageref = [Assetimagegenerator copycgimageattime:cmtimemake (thumbnailimagetime, 60)  Actualtime:NULL error:&thumbnailimagegenerationerror];

　　if (!THUMBNAILIMAGEREF)

NSLog (@ "Thumbnailimagegenerationerror%@", thumbnailimagegenerationerror);

Uiimage*thumbnailimage = Thumbnailimageref?  [[UIImage Alloc]initwithcgimage: thumbnailimageref]: nil;

　　　　return thumbnailimage;

}

iOS Development videos Get the first frame picture from the URL to get any frame picture