May*_*ain 5 objective-c avfoundation avaudiorecorder ios ezaudio
我想修剪用EZAudioRecorder录制的音频.
我正在编写此代码来修剪音频.这对于使用AVAudioRecorder录制的音频工作正常但是它会触发EZAudioRecorder的错误阻止,错误无法打开文件.
-(BOOL)trimAudiofile{
float audioStartTime=1.0;
float audioEndTime=2.0;//define end time of audio
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"yyyy-MM-dd_HH-mm-ss"];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *libraryCachesDirectory = [paths objectAtIndex:0];
libraryCachesDirectory = [libraryCachesDirectory stringByAppendingPathComponent:@"Caches"];
NSString *OutputFilePath = [libraryCachesDirectory stringByAppendingFormat:@"/output_%@.m4a", [dateFormatter stringFromDate:[NSDate date]]];
NSURL *audioFileOutput = [NSURL fileURLWithPath:OutputFilePath];
NSURL *audioFileInput=[self testFilePathURL];//<Path of orignal audio file>
if (!audioFileInput || !audioFileOutput)
{
return NO;
}
[[NSFileManager defaultManager] removeItemAtURL:audioFileOutput error:NULL];
AVAsset *asset = [AVAsset assetWithURL:audioFileInput];
AVAssetExportSession *exportSession = [AVAssetExportSession exportSessionWithAsset:asset
presetName:AVAssetExportPresetAppleM4A];
if (exportSession == nil)
{
return NO;
}
CMTime startTime = CMTimeMake((int)(floor(audioStartTime * 100)), 100);
CMTime stopTime = CMTimeMake((int)(ceil(audioEndTime * 100)), 100);
CMTimeRange exportTimeRange = CMTimeRangeFromTimeToTime(startTime, stopTime);
exportSession.outputURL = audioFileOutput;
exportSession.timeRange = exportTimeRange;
exportSession.outputFileType = AVFileTypeAppleM4A;
[exportSession exportAsynchronouslyWithCompletionHandler:^
{
if (AVAssetExportSessionStatusCompleted == exportSession.status)
{
NSLog(@"Export OK");
}
else if (AVAssetExportSessionStatusFailed == exportSession.status)
{
NSLog(@"Export failed: %@", [[exportSession error] localizedDescription]);
}
}];
return YES;
}
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注意: - 音频文件存在于文档目录中,EZAudioPlayer也可以播放此文件.
谁能告诉我我哪里做错了?任何有关这方面的帮助将不胜感激.
提前致谢.
谢谢大家..我找到了这个问题的解决方案...!!
我没有关闭音频文件。我在修剪音频之前添加了这段代码,现在一切都按预期工作。
即使文件存在于文档目录中,我们也需要关闭该文件。
if (self.recorder)
{
[self.recorder closeAudioFile];
}
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