[xine-bugs] [Bug 16] New: Flac demuxer sends wrong input_time

[<bug...@xi...>]

http://bugs.xine-project.org/show_bug.cgi?id=16

           Summary: Flac demuxer sends wrong input_time
           Product: xine-lib
           Version: 1.1.8
          Platform: i386/x86
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: Plugins / Demuxer
        AssignedTo: xin...@xi...
        ReportedBy: fra...@ya...


(Originally submitted at the Sourceforge tracker as bug #1822732)

I noticed that in xine based players, the flac time display is a few seconds
off from the real time value. So if I start playing a file, and at the same I
start a timer, the time values do not match.

This is most likely because of the variable bitrate of flac, because the timer
goes slower or faster as the bitrate becomes lower or higher. 

I tried to find the bug myself, and found that demux_flac_send_chunk in
demux_flac.c sends an _estimate_ of the input_time field. Judging from the
code, this was intended, but it is clearly not desired behaviour (I ran across
this when people shared some great moments in music by Pat Metheny, like "check
Nando's Kalimba at the 12:03 mark of Part 1").

Maybe a solution is not to use the nominal bitrate, but the bitrate at a
certain point in time. However, I'm not really into the xine code, so I cannot
say if this is easy to implement. I found that XMMS gives the correct timings,
so it should be possible. Thanks for looking into this.


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