Re: afinfo
Re: afinfo
- Subject: Re: afinfo
- From: Robert Martin <email@hidden>
- Date: Thu, 4 Nov 2010 23:15:41 -0400
You can also use AudioFileGetProperty with kAudioFilePropertyEstimatedDuration - (see AudioFile.h)
On Nov 4, 2010, at 6:40 PM, Jean-Daniel Dupas wrote:
>
> Le 4 nov. 2010 à 22:20, email@hidden a écrit :
>
>> Hi,
>>
>> I have set up a NSTask to log the afinfo output, which works already.
>> My question is:
>> Is there an argument that gives me back only the duration of the audiofile ?
>> In the terminal I can do this with -afinfo filename | grep "estimated duration" ,
>> but that does not work with NSTask.
>>
>
> What about using CoreAudio API instead ?
>
> ExtAudioFileRef file;
> if (noErr == ExtAudioFileOpenURL(myURL, &file)) {
> UInt64 frames = 0;
> AudioStreamBasicDescription desc;
> UInt32 pfSize = sizeof(UInt64), descSize = sizeof(AudioStreamBasicDescription);
> if (noErr == ExtAudioFileGetProperty(file, kExtAudioFileProperty_FileDataFormat, &descSize, &desc) &&
> noErr == ExtAudioFileGetProperty(file, kExtAudioFileProperty_FileLengthFrames, &pfSize, &frames)) {
> double duration = frames / desc.mSampleRate;
> }
> ExtAudioFileDispose(file);
> }
>
>
> -- Jean-Daniel
>
>
>
>
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| References: | |
| | >afinfo (From: email@hidden <email@hidden>) |
| | >Re: afinfo (From: Jean-Daniel Dupas <email@hidden>) |