[Bug 740130] matroskamux: wrong duration on some files

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740130
  GStreamer | gst-plugins-good | 1.4.4

--- Comment #3 from Nicola <lists at svrinformatica.it> 2014-11-14 23:39:39 UTC ---
Created an attachment (id=290744)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=290744)
file that show the initial problem

The initial problem can be see with the attached file:

gst-launch-1.0 -v filesrc location=/tmp/test.gdp ! gdpdepay ! fakesink

show:

/GstPipeline:pipeline0/GstFakeSink:fakesink0.GstPad:sink: caps =
"video/x-h264\,\ stream-format\=\(string\)avc\,\ alignment\=\(string\)au\,\
codec_data\=\(buffer\)014d401effe1000f674d401e9a6604012d80b50501050201000468ee3c80\,\
width\=\(int\)512\,\ height\=\(int\)288\,\ framerate\=\(fraction\)0/1\,\
parsed\=\(boolean\)true\,\ pixel-aspect-ratio\=\(fraction\)1/1\,\
level\=\(string\)3\,\ profile\=\(string\)main"

so framerate is 0/1

now:

gst-launch-1.0 -v filesrc location=/tmp/test.gdp ! gdpdepay ! matroskamux !
filesink location=/tmp/test.mkv

and finally:

gst-launch-1.0 -v filesrc location=/tmp/test.mkv ! matroskademux
streamable=true ! fakesink

show:

/GstPipeline:pipeline0/GstFakeSink:fakesink0.GstPad:sink: caps =
"video/x-h264\,\ level\=\(string\)3\,\ profile\=\(string\)main\,\
codec_data\=\(buffer\)014d401effe1000f674d401e9a6604012d80b50501050201000468ee3c80\,\
stream-format\=\(string\)avc\,\ alignment\=\(string\)au\,\ width\=\(int\)512\,\
height\=\(int\)288\,\ framerate\=\(fraction\)25/1"

so the framerate is now 25/1 and this cause a wrong 40 milliseconds duration
and so a wrong duration in matroska header if you remux to add indexes

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