1.    02 Jun 2017 #1
    Join Date : Jun 2017
    Posts : 6
    Windows 10

    Sound File Reports Wrong Information


    Hi all

    I have a sound file that reports it's only 880k big and 13 seconds long.
    If I pay it in a media player, it's actually a few minutes. I also suspect it isn't actually 880k big as it's around 300kbps. I read VBR songs, if encoded incorrectly, use the first bits of the file to display it's time length.

    Found this: VBRFix new version: Corrects Stream Length bug

    but the program doesn't work, despite it saying it has.

    I have others that report being 30+ minutes but are less than 5.

    Is there anything I can do?
      My ComputerSystem Spec
  2.    02 Jun 2017 #2
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,035
    Win 10 Pro (1703)

    Suggest you upload such a file and provide a link to it..

    Please post a screenshot showing how you see a report of incorrect duration. Thanks.
      My ComputerSystem Spec
  3.    02 Jun 2017 #3
    Join Date : Jun 2017
    Posts : 6
    Windows 10
    Thread Starter

    I zipped the file (attached).
    Right-click and see the properties. However, when you actually play it, the file time length is completely different.
    Sound File Reports Wrong Information Attached Files
      My ComputerSystem Spec
  4.    02 Jun 2017 #4
    Join Date : Aug 2016
    S/E England
    Posts : 4,520
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by SirTophamHatt View Post
    I zipped the file (attached).
    Right-click and see the properties. However, when you actually play it, the file time length is completely different.
    File Explorer shows 13 seconds.
    Groove Music plays 13 seconds.
    Audacity opens it and plays 13 seconds.
    FFmpeg shows:
    Code:
     Metadata:
        album           : Kalax
        artist          : Kalax
        genre           : Electronic
        title           : Time Lapse
        track           : 1
        date            : 2017
      Duration: 00:00:13.56, start: 0.023021, bitrate: 539 kb/s
        Stream #0:0: Audio: mp3, 48000 Hz, stereo, s16p, 310 kb/s
    Converting it using FFmpeg to another file make a 13 second long copy.

    Whatever you are playing after the 13 seconds is up is not in this file, somehow it's linking to another when you play it?
      My ComputersSystem Spec
  5.    02 Jun 2017 #5
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,035
    Win 10 Pro (1703)

    This is only 13s long - which player were you using?
    Click image for larger version. 

Name:	Snap 2017-06-02 at 17.07.29.jpg 
Views:	2 
Size:	88.4 KB 
ID:	137705
      My ComputerSystem Spec
  6.    02 Jun 2017 #6
    Join Date : Jun 2017
    Posts : 6
    Windows 10
    Thread Starter

    Hmm.
    Maybe that wasn't the file I was looking at through an audio program.

    However, I have tested this one (attached) and it really does distort the time. However, ran it through the program I linked to and it worked this time.

    Peter Sandberg - Truth.zip

    Will mark as solved though as the program did correct it.
      My ComputerSystem Spec
  7.    02 Jun 2017 #7
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,035
    Win 10 Pro (1703)

    Click image for larger version. 

Name:	Snap 2017-06-02 at 17.18.39.jpg 
Views:	3 
Size:	102.8 KB 
ID:	137714
    That one is different.
    Also very low bit rate and 1 min 40 is short for a song.
      My ComputerSystem Spec
  8.    02 Jun 2017 #8
    Join Date : Aug 2016
    S/E England
    Posts : 4,520
    10 Home x64 (1709) (10 Pro on 2nd pc)

    Quote Originally Posted by SirTophamHatt View Post
    However, I have tested this one (attached) and it really does distort the time...
    That one reports 1:58 in Properties, but is actually 1:50 when played. Converting with Ffmpeg gives a copy that's 01:49.82 long. I have seen small discrepancies like this before - a few seconds difference between 'properties' and actual play time, even on some of my own recordings.
      My ComputersSystem Spec
  9.    02 Jun 2017 #9
    Join Date : Jun 2017
    Posts : 6
    Windows 10
    Thread Starter

    Does it report the low kbps because it's a variable bitrate file?
    So that program just looks at the first section and decides it's all the same?
      My ComputerSystem Spec
  10.    02 Jun 2017 #10
    Join Date : Jan 2015
    UK, Midlands
    Posts : 11,035
    Win 10 Pro (1703)

    No, that's Windows properties sheet showing 18s, overlaid on the wave editor. 2 different things.

    Click image for larger version. 

Name:	Snap 2017-06-02 at 18.01.04.jpg 
Views:	6 
Size:	65.0 KB 
ID:	137717
    Here you can see it's VBR
    VLC player -> 1min 49.

    If I create a new VBR file from the wave editor, the length is consistently reported ok.

    How was the file created?
      My ComputerSystem Spec

 


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