FFMPEG获取视频截图和时长，需要导入kxmovie库

原创

于 2014-04-27 11:29:24 发布 · 2.2k 阅读

CC 4.0 BY-SA版权

这段代码展示了如何利用KxMovieDecoder从FFMPEG库中获取视频的缩略图和时长。通过初始化KxMovieDecoder，打开视频文件，解码帧并提取最后一个视频帧作为缩略图，然后获取视频的总时长。最后，将缩略图保存到文档目录，并保存相关信息到字典数组中。

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#pragma mark - 获取视屏缩略图和时长
#import "KxMovieDecoder.h"

-(void)getVideoDuartionAndThumb:(NSString *)videoURL
{
    
   //decoder = [[KxMovieDecoder alloc] init];

    [decoder openFile:videoURL error:nil];
    NSArray *ar =  [decoder decodeFrames:1.0f];
    KxMovieFrame *frame;
    
    for (KxMovieFrame *frames in ar)
    {
        if (frames.type == KxMovieFrameTypeVideo) {
            frame =  ar.lastObject;
            break;
        }
    }
    
    KxVideoFrameRGB *rgbFrame = (KxVideoFrameRGB *)frame;
    UIImage *imageKX = [rgbFrame asImage];
    float videoDuartion = decoder.duration;
    [decoder closeFile];
    
    
    NSData *imageData = UIImageJPEGRepresentation(imageKX, 0.2f);
    NSString *dic = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, YES) objectAtIndex:0];
    
    //创建视频文件夹
    NSString *str = [dic stringByAppendingPathComponent:@"thumbs"];
    str = [str stringByAppendingString:[NSString stringWithForm