我是JavaCV的新手,所以问题可能很明显。我正在尝试完成从视频中获取图像和音频的简单,困难的任务,这样我就可以开始制作视频编辑器了。经过许多混乱和错误之后,我终于得到了结果,但这和错误一样奇怪。图像似乎在x方向被压缩,右侧的多余空间是透明的(因此图像大小与视频的大小匹配)。此外,它还有很多额外的透明像素,并且以奇怪的方式进行了彩色处理。
图像应为:https://gofile.io/d/1lQnNd
图像的外观:https://gofile.io/d/kc09G7
这是我的代码:
try {
FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber("C:/Users/mega12345mega/Desktop/Test Files/video.mp4");
frameGrabber.setformat("mp4");
frameGrabber.start();
int width = frameGrabber.getImageWidth();
int height = frameGrabber.getImageHeight();
System.out.println("width: " + width + ",height: " + height);
Frame frame = frameGrabber.grabImage();
if (frame == null)
throw new Exception("Frame is NULL!");
if (frame.image == null)
throw new Exception("Frame Image is NULL!");
BufferedImage bi = new BufferedImage(width,height,BufferedImage.TYPE_INT_ARGB);
if (bi == null)
throw new Exception("bi is NULL!");
Java2DFrameConverter.copy(frame,bi);
ImageIO.write(bi,"png",new File("C:/Users/mega12345mega/Desktop/Test Files/img.png"));
frameGrabber.stop();
frameGrabber.close();
} catch (Exception e) {
throw new Exception("Error Getting Image",e);
}
如果您有兴趣,可以在这里找到控制台:
width: 1280,height: 720
Input #0,mov,mp4,m4a,3gp,3g2,mj2,from 'C:/Users/mega12345mega/Desktop/Test Files/video.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf58.29.100
Duration: 00:00:04.95,start: 0.000000,bitrate: 16375 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),yuv420p,1280x720 [SAR 1:1 DAR 16:9],16401 kb/s,60 fps,60 tbr,90k tbn,120 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D),44100 Hz,stereo,fltp,2 kb/s (default)
Metadata:
handler_name : SoundHandler
另外,如果我只执行frameGrabber.grab()
而不是frameGrabber.grabImage()
(我相信它会排除音频),则帧的image属性为null(即frame.image == null
语句所在的位置)对于)。我不确定这是否属于一个新问题,但对此的帮助也将受到赞赏。
谢谢!