[FFmpeg-user] -qscale:a and -write_xing 0 can't be used at same time?

桃源老師 xanadu6291 at dream.jp
Sat Jan 28 00:04:22 EET 2017

Hello Lou-san,

Thanks for your reply:

> 2017/01/28 6:09 A.M. Lou <lou<at>lrcd.com> wrote:
> On Fri, 27 Jan 2017 00:53:43 +0900
> 桃源老師 <xanadu6291 at dream.jp <mailto:xanadu6291 at dream.jp>> wrote:
>> Hello ffmpeg experts...
>> I'm trying to convert alac (Apple Lossless Audio Codec) to mp3 on
>> macOS.
>> I found that the result mp3 shows twice long duration in macOS Finder
>> and iTunes.  I googled and found that adding "-write_xing 0" fixes
>> this wrong duration.
>> But if I try to use "-write_xing 0" with "-qscale:a 2" at same time,
>> the resulting mp3 shows very wrong duration on macOS Finder and
>> iTunes.
>> Is -qscale:a and -write_xing 0 can't used at same time?
> Related:
> http://trac.ffmpeg.org/ticket/2697 <http://trac.ffmpeg.org/ticket/2697>
Yes I read this roughly and thought that "-write_xing 0" is magic word to fix duration...

Now I found that "-qscale:a" and "-write_xing 0" should not be used at the same time.

Brest Regards,

// Miya aka. TougenRoushi
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