[Bug 731890] New: I've written GstImageSequenceSrc which improves GstMultiFileSrc

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=731890
  GStreamer | gst-plugins-bad | 1.3.1

           Summary: I've written GstImageSequenceSrc which improves
                    GstMultiFileSrc
    Classification: Platform
           Product: GStreamer
           Version: 1.3.1
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: cfoch at live.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=278728)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=278728)
It is an example of how to use GstImageSequenceSrc

Hello guys. I've written an element in gst-plugins-bad which I called as
GstImageSequenceSrc. It works very similar to GstMultiFileSrc, but there are
some differences. 

Differences with GstMultiFileSrc.

* Handles a list of filenames instead of a printf pattern as GstMultiFileSrc
does.
    - Having a list of filenames is useful because you can set the filenames
you want,
    in the order you want. For example, you can add more filenames or sort the
list.
    - There are two ways to create this list:
        a) Setting a location propertie. This value could look like:
          1) "/some/folder/with/images/ or ."
          2) "/a/path/img.jpg,/other/path/img2.jpg" or "img1.png,img2.png"
          3) "/a/path/*.JPEG" or "*.png"
        b) Setting the filename-list (GList) directly.

* Creates an "imagesequence://" protocol which allows the playbin to play this
element. It handles a 'fake' uri but it is useful finally.
    gst-launch-1.0 playbin
uri="imagesequencesrc:///some/path/*.jpg?framerate=20/1&loop=1"

* It "detects" the mimetype of the images. You only have to worry about the
framerate.
* It calculates the duration.

Things to improve:
* Seeking: it seeks to the wrong image sometimes (actually, after many seeks).
* The way duration is calculated.

PD: stormer was telling me to support png *and* jpeg files (both at the same
time) but I don't see a usecase.

You can see the most-stable version of this element in 
https://github.com/cfoch/gst-plugins-bad/tree/sequences/gst/sequences

Develop:
https://github.com/cfoch/gst-plugins-bad/tree/sequences-develop/gst/sequences

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