[gstreamer-bugs] [Bug 625673] If framerate cannot be ascertained them default to 25 fps...

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=625673
  GStreamer | gst-plugins-bad | git

--- Comment #14 from Robert Krakora <rob.krakora at messagenetsystems.com> 2010-08-02 14:51:46 UTC ---
In mpeg4videodec.c in gst-ffmpeg-0.10.11 the following code is present:

    if (get_bits1(gb) != 0) {   /* fixed_vop_rate  */
        s->avctx->time_base.num = get_bits(gb, s->time_increment_bits);
    }else
        s->avctx->time_base.num = 1;

In mpeg4videoparse.c the following code is present:

  GET_BITS (&bs, 1, &bits);
  if (bits) {
    /* fixed time increment */
    int n;

    /* Length of the time increment is the minimal number of bits needed to
     * represent time_increment_resolution */
    for (n = 0; (time_increment_resolution >> n) != 0; n++);
    GET_BITS (&bs, n, &bits);

    fixed_time_increment = bits;
  } else {
    /* When fixed_vop_rate is not set we can't guess any framerate */
    fixed_time_increment = 0;
  }

If I change fixed_time_increment = 1 insteade of fixed_time_increment = 0 in
the mpeg4videoparse.c code above with no other changes then the video stream
with which I am having problems plays just fine with the Fluendo MPEG4 video
codec.

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