[Bug 784989] qtdemux: cannot play file downloaded from vimeo: no valid frames found

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=784989

--- Comment #28 from Paul Wise <pabs3 at bonedaddy.net> ---
I have bisected this and found the following commit in gst-plugins-good fixes
the issue. Unfortunately it does not apply to the stable release in Debian.

commit 025a430d0861bdbc3d8221bddeaa2adae85bfc3e (HEAD, refs/bisect/working)
Author: Alicia Boya García <aboya at igalia.com>
Date:   Sat Jun 9 23:58:01 2018 +0200

    qtdemux: rework segment event pushing, again

    This patch aims at fixing the recent regressions in the adaptive test
    suite.

    All segment pushing in push mode is now done with
    gst_qtdemux_check_send_pending_segment(), which is idempotent and
    handles both edit lists cases and cases where the upstream TIME segments
    have to be sent directly.

    Fragmented files that start with a non-zero tfdt are also taken into
    account, but their handling has been vastly simplified: now they are
    handled as implicit default seeks so there is no need to extend the
    GstSegment formulas as was being done before.

    qtdemux->segment.duration is no longer modified when
    upstream_format_is_time, respecting in this way the durations provided
    by dashdemux and fixing bugs in reverse playback tests where mangled
    durations appeared in the emitted segments.

    https://bugzilla.gnome.org/show_bug.cgi?id=752603

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