[gstreamer-bugs] [Bug 581863] New: gnonlin has problems when mixing between two audio tracks using adder operation

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gnonlin | Ver: git
           Summary: gnonlin has problems when mixing between two audio
                    tracks using adder operation
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gnonlin
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: thomas at apestaart.org
         QAContact: bilboed at gmail.com
     GNOME version: Unspecified
   GNOME milestone: Unspecified


The test case, and full report is here:
https://thomas.apestaart.org/thomas/trac/browser/tests/gnonlin/endbug

The test files are here:
http://thomas.apestaart.org/download/tmp/

Summary of the report:

Failure modes:
        A: doesn't link
        B: goes to PLAYING but does not actually play
        C: glitch at 10 seconds when track 1 ends (slight dropout or repeat)
        D: glitch at 5 seconds when track 2 starts, repeats small part of first
        E: error at 10 seconds, track 2 stops as well
        F: output drops out at 5 seconds, when track 2 starts, comes back
slightly after that (around 7 seconds) with track 1 gone and track 2 playing
where it would be expected
        G: no mix, at 5 secs track 1 stops and track 2 starts playing but is 5
seconds far already, so not at correct offset; and stops at 10 seconds instead
of 15
        H: error at 5 seconds, track 1 stops and nothing plays anymore


Summary:
                  AudioSource  gnlfilesrc singledecodebin uridecodebin
flac   - flac     5/5 C        2/5 C      3/5 C           1/5 C
mp3    - mp3      0/5          0/5        0/5             0/5
vorbis - vorbis   0/5          0/5        0/5             0/5
mp3    - flac     5/5 C        5/5 F      5/5 F           5/5 F
flac   - mp3      2/5 G, H     5/5 G      5/5 G           5/5 G
vorbis - flac     5/5 (3H, 2G) 5/5 H      5/5 H           5/5 F
flac   - vorbis   0/5          5/5 G      5/5 E           5/5 G
vorbis - mp3      5/5 H        5/5 H      5/5 G           5/5 H
mp3    - vorbis   0/5          5/5 H      5/5 G           5/5 2H 3G

Conclusions:
- the only thing that works flawlessy with all 4 sources is mp3-mp3 and
  vorbis-vorbis
- AudioSource seems to work the best
- Everything with flac in it has a problem; C, G, H, E


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You can add comments to this bug at http://bugzilla.gnome.org/show_bug.cgi?id=581863.