大佬教程收集整理的这篇文章主要介绍了ios – 如何使用AVAssetWriter缩小尺寸的视频？，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
你如何设定？在影片设置？我认为AVVideoWidthKey和AVVideoHeightKey更适合于不需要物理维度的分辨率.
NSDictionary *videoSetTings = [NSDictionary DictionaryWithObjectsAndKeys: AVVideoCodecH264,AVVideoCodecKey,[NSnumber numberWithInt: 320],AVVideoWidthKey,[NSnumber numberWithInt:480],AVVideoHeightKey,nil]; AVAssetWriterInput* writerInput = [[AVAssetWriterInput assetWriterInputWithMediaType:AVMediaTypeVideo outputSetTings:videoSetTings] retain
NSDictionary *videoCleanApertureSetTings = [NSDictionary DictionaryWithObjectsAndKeys: [NSnumber numberWithInt:320],AVVideoCleanApertureWidthKey,AVVideoCleanApertureHeightKey,[NSnumber numberWithInt:10],AVVideoCleanApertureHorizontalOffsetKey,AVVideoCleanApertureVerticalOffsetKey,nil]; NSDictionary *videoAspectRatioSetTings = [NSDictionary DictionaryWithObjectsAndKeys: [NSnumber numberWithInt:3],AVVideoPixelAspectRatioHorizontalSpacingKey,[NSnumber numberWithInt:3],AVVideoPixelAspectRatioVerticalSpacingKey,nil]; NSDictionary *codecSetTings = [NSDictionary DictionaryWithObjectsAndKeys: [NSnumber numberWithInt:960000],AVVideoAverageBitRateKey,[NSnumber numberWithInt:1],AVVideoMaxKeyFrameIntervalKey,videoCleanApertureSetTings,AVVideoCleanApertureKey,//videoAspectRatioSetTings,AVVideoPixelAspectRatioKey,//AVVideoProfileLevelH264Main30,AVVideoProfileLevelKey,nil]; NSString *targetDevice = [[UIDevice currentDevice] model]; NSDictionary *videoSetTings = [NSDictionary DictionaryWithObjectsAndKeys: AVVideoCodecH264,codecSetTings,AVVideoCompressionPropertiesKey,[NSnumber numberWithInt:320],nil];
以上是大佬教程为你收集整理的ios – 如何使用AVAssetWriter缩小尺寸的视频？全部内容，希望文章能够帮你解决ios – 如何使用AVAssetWriter缩小尺寸的视频？所遇到的程序开发问题。
如果觉得大佬教程网站内容还不错，欢迎将大佬教程推荐给程序员好友。
本图文内容来源于网友网络收集整理提供，作为学习参考使用，版权属于原作者。
如您有任何意见或建议可联系处理。小编QQ：384754419，请注明来意。