[gstreamer-bugs] [Bug 318273] [audioscale] messed up timestamps

[GStreamer (bugzilla.gnome.org)]

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 GStreamer | gst-plugins | Ver: 0.8.x

Tim-Philipp Müller changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
      everconfirmed|0                           |1
            Summary|gstreamer cannot play some  |[audioscale] messed up
                   |wave files                  |timestamps



------- Additional Comments From Tim-Philipp Müller  2005-10-10 11:14 -------
Thanks for the sample file.


In 0.8 it plays fine for me with osssink, but not with alsasink. In my setup it
turns out that the reason is that audioscale timestamps buffers wrongly (with
osssink audioscale just does pass-through, whereas for alsasink it has to
resample to 48000 for me).

Also plays fine with both alsasink and osssink in 0.9.



This is timestamping with audioscale in passthrough mode:

 % gst-launch-0.8 -v filesrc location=pcm-mono-8kHz-bug318273.wav ! wavparse !
audioconvert ! audioscale ! 'audio/x-raw-int, rate=(int)8000, channels=(int)2,
endianness=(int)1234, width=(int)16, depth=(int)16' ! fakesink

timestamp: 0:00:00.000000000, duration: 0:00:00.256000000, offset: 44
timestamp: 0:00:00.256000000, duration: 0:00:00.256000000, offset: 4140
timestamp: 0:00:00.512000000, duration: 0:00:00.256000000, offset: 8236
timestamp: 0:00:00.768000000, duration: 0:00:00.256000000, offset: 12332
timestamp: 0:00:01.024000000, duration: 0:00:00.256000000, offset: 16428
timestamp: 0:00:01.280000000, duration: 0:00:00.256000000, offset: 20524
timestamp: 0:00:01.536000000, duration: 0:00:00.256000000, offset: 24620
timestamp: 0:00:01.792000000, duration: 0:00:00.256000000, offset: 28716
timestamp: 0:00:02.048000000, duration: 0:00:00.256000000, offset: 32812
timestamp: 0:00:02.304000000, duration: 0:00:00.256000000, offset: 36908
timestamp: 0:00:02.560000000, duration: 0:00:00.256000000, offset: 41004
timestamp: 0:00:02.816000000, duration: 0:00:00.256000000, offset: 45100
timestamp: 0:00:03.072000000, duration: 0:00:00.256000000, offset: 49196
timestamp: 0:00:03.328000000, duration: 0:00:00.256000000, offset: 53292
timestamp: 0:00:03.584000000, duration: 0:00:00.256000000, offset: 57388
timestamp: 0:00:03.840000000, duration: 0:00:00.256000000, offset: 61484
timestamp: 0:00:04.096000000, duration: 0:00:00.256000000, offset: 65580
timestamp: 0:00:04.352000000, duration: 0:00:00.256000000, offset: 69676
timestamp: 0:00:04.608000000, duration: 0:00:00.256000000, offset: 73772
timestamp: 0:00:04.864000000, duration: 0:00:00.256000000, offset: 77868
timestamp: 0:00:05.120000000, duration: 0:00:00.256000000, offset: 81964
timestamp: 0:00:05.376000000, duration: 0:00:00.256000000, offset: 86060
timestamp: 0:00:05.632000000, duration: 0:00:00.035250000, offset: 90156


This is timestamping with audioscale doing resampling:

 % gst-launch-0.8 -v filesrc location=pcm-mono-8kHz-bug318273.wav ! wavparse !
audioconvert ! audioscale ! 'audio/x-raw-int, rate=(int)48000, channels=(int)2,
endianness=(int)1234, width=(int)16, depth=(int)16' ! fakesink 

timestamp: 0:00:00.000000000, duration: 0:00:00.063748980, offset: -1
timestamp: 0:00:00.063748980, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.127747956, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.191746932, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.255745908, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.319744884, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.383743860, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.447742836, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.511741812, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.575740788, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.639739764, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.703738740, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.767737716, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.831736692, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.895735668, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:00.959734644, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.023733620, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.087732596, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.151731572, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.215730548, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.279729524, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.343728500, duration: 0:00:00.063998976, offset: -1
timestamp: 0:00:01.407727476, duration: 0:00:00.008812359, offset: -1


I wonder if this is also the cause for quite a few of the 'this files sounds
crap in alsasink' problems we're having.

Cheers
 -Tim


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