Fading color (to black) is not useful for media with transparency; there fading of alpha is necessary; the fading mode allows to select fade color or fade alpha. Also the source control window had to be adapted, with a checkerboard to show the alpha effect. The cropping of the image in control window was also fixed.
Allows looking for audio streams in media files (settings) and enabling / disabling audio for each MediaPlayer individually. Control of volume per media, saving in session file.
Enable playing and seeking into a timeline on a media player that loaded an image. Timeline sets a duration (end) and is saved/loaded. Add a gstreamer imagefreeze element in the pipeline to simulate a playable stream. Distinction must be made between 'isImage' (what was loaded) and 'singleFrame' (what is in the pipeline). GUI is added and customized with menu and dialog.
Play speed slider changes the speed without changing direction (not working well). Change play direction is now in a play sub-menu (mouse over) in play bar. Video menu changed, with Timeline section
Change implementation of gst pipeline in MediaPlayer to use gstreamer playbin. This makes everything works more smoothly (including instant rate change). This also opens the possibility to allow audio mixing. Other bugfixes include set play speed rate at start, add video effects on reopen media player.
Deleting a MediaPlayer requires stopping the pipeline and deleting it; the call to gst_element_set_state (pipeline_, GST_STATE_NULL); is however hanging. Running this in a separate thread seems to fix the problem. It is not 100% sure however if the gst_object_unref ( GST_OBJECT (pipeline_) ); will be thread safe and not crashing...
2 new callbacks (PlayFastForward, PlaySpeed), modified Seek callback to take target time in seconds (instead of ratio of duration). Integrating this in Input Mapping GUI and Session saving.
All Stream report failure with logs, read in InfoVisitor for Sources. ImGuiVisitor for Sources also detect failure of source and its stream.
Cleanup of unused includes and functions.
The case of MISSING_PLUGINS for audio in gst discoverer should not prevent from decoding video stream in media. The failure of discoverer should only be in absence of video stream.
