| finding/calculating the duration of an MP3 file??? [message #63897] |
Sat, 21 August 2010 05:54  |
Mr Red
Messages: 2
Registered: August 2010
Location: Gloucestershire UK
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Esquire |
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I am sure it is an old chestnut but it is proving difficult to pin down.
The target usage is for Michas music cart and generating the button file outside of Michas. It is a very convenient text kind of file and the lines obvious.
I have looked at the mp3 header and have the WIKI page but still can't see any direct/indirect method for calculating duration. I do see problems if it takes a un-encoding process to find the length. Counting the blocks is not too much of a problem, as long as I can spot them.
http://cresby.com
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| Re: finding/calculating the duration of an MP3 file??? [message #63908 is a reply to message #63898] |
Mon, 23 August 2010 06:10  |
Mr Red
Messages: 2
Registered: August 2010
Location: Gloucestershire UK
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Esquire |
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Yea. Thanks.
I read the posts on this forum about approximations.
I arrived at that kind of estimate first.
The real problem is that the target application is Michas, and this is intented for Radio (FM on air playlist app) so when the first comparison was 10 seconds out I went searching.
I have just run all my .mp3 files through Michas and have CART files for all of them which will give me the durations that Michas works to. But I don't really want to be doing it for new files. It would be a Logistic Nightmare. As it is I will have to run VBA to extract the CART info and sort and copy and zzzzzzzzzzzzzzzzzzzzzzzzzzzz.
I will go looking but code would probably be in C++ so I am looking for methodology.
Constant bit rate at 192 for this station.
http://stroudfm.co.uk
http://cresby.com
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