Lecture shortened from wav to mp3

[Unregistered]

I recorded a fifty minute lecture by a visiting professor, as a wav file. I used dMC to convert it to mp3, and it's now ten minutes shorter! Why is this? Is the mp3 speeding up the speech?

[Spoon]

Two things you can check, first hold the mouse over the Wave file, it should tell you the length - does it say 50 minutes?

2nd Play the wave file, jump to the end and listen to the last few seconds, next listen to the mp3 - does it contain the same ending?

[Unregistered]

Re:shortened lecture

Thank you so much for taking the time to reply. The lecture as a wav file is 53 mins 29 secs. When I play the converted mp3 file in Winamp, it shows the time as 39 mins 43 secs. However, when that time is reached, the file continues to play to the end, which comes at 48 mins 34 secs.

So I guess the story is that the lecture begins and ends at the same point in both versions, but is about five minutes shorter as an mp3, and Winamp (for some reason) thinks it is even shorter than that.

Any ideas?

[MasterOfPuppets]

ive had problems with the wrong track time on many of my files also.

i suspect the tags are corrupted, not sure though

any ideas on how to fix it?

[Spoon]

It will be a VBR file, combine these with ID3v2 tags and programs get the time wrong...

[Unregistered]

Once again, many thanks for replying.

I suppose the one thing Winamp is not getting wrong is the actual time it takes to get through the file, as represented by the minutes and seconds actually going by on the clock.

That still leaves the puzzle of how the mp3 file could be five minutes shorter than the wav file. Is it possible that there is some kind of speeding up of the speech?