<p>Size/duration? :)</p>
<div class="gmail_quote">09.06.2011 0:41 пользователь "Frank Lai" <<a href="mailto:frank.franklai@gmail.com">frank.franklai@gmail.com</a>> написал:<br type="attribution">> The alac format info is from<br>
> <a href="http://wiki.multimedia.cx/index.php?title=Apple_Lossless_Audio_Coding">http://wiki.multimedia.cx/index.php?title=Apple_Lossless_Audio_Coding</a><br>> <br>> Test an alac file encoded by iTunes. The bitrate is correct. But test<br>
> another alac file encoded by FFmpeg, the bitrate is 1411 kbps.<br>> <br>> Found a link discussing this issue<br>> <a href="http://www.hydrogenaudio.org/forums/index.php?showtopic=76768">http://www.hydrogenaudio.org/forums/index.php?showtopic=76768</a><br>
> Looks like FFmpeg did not fill the bitrate value correctly. But other<br>> applications (except iTunes) can report the correct bitrate, so there should<br>> be another way to calculate the bitrate.<br>> <br>
> Best Regards,<br>> Frank Lai<br>> <br>> 2011/6/9 Lukáš Lalinský <<a href="mailto:lalinsky@gmail.com">lalinsky@gmail.com</a>><br>> <br>>> On Wed, Jun 8, 2011 at 6:45 PM, Frank Lai <<a href="mailto:frank.franklai@gmail.com">frank.franklai@gmail.com</a>><br>
>> wrote:<br>>> > Hi all,<br>>> > The attached patch is for read properties from "alac" atom when the audio<br>>> > codec in mp4 is ALAC.<br>>><br>>> Hi Frank,<br>>><br>
>> Thanks for the patch. It seems to work fine, except for bitrates. What<br>>> is the source that you used for the format info? I've encoded a small<br>>> file consisting only of silence and all applications report it to have<br>
>> 3 kbps. Your code reports 1411 kpbs, which is what I get when I<br>>> convert it to a wav file. Is it possible that it's the bitrate of the<br>>> uncompressed audio data?<br>>><br>>> Lukas<br>
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>><br></div>