Trying to send an attachment to Bugzilla failed with timeout for me unfortunately. 

We have a patch that fixes the issue. We hope it does not have any side-effect. It seems that there was a rendering hack in place for some reason, but we don't see any need for it currently.

Posting our patch proposal here:

From: Stephan Hesse <tchakabam@gmail.com>
Date: Fri, 20 Apr 2018 11:22:37 +0200
Subject: [PATCH] iOS GstPlay: fix seeking slider behavior

---
 playback/player/ios/GstPlay/VideoViewController.m | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/playback/player/ios/GstPlay/VideoViewController.m b/playback/player/ios/GstPlay/VideoViewController.m
index 079fcde..767426f 100644
--- a/playback/player/ios/GstPlay/VideoViewController.m
+++ b/playback/player/ios/GstPlay/VideoViewController.m
@@ -74,6 +74,9 @@ - (void)viewDidLoad
     
     is_local_media = [uri hasPrefix:@"file://"];
     is_playing_desired = NO;
+    time_slider.value = 0;
+    time_slider.minimumValue = 0;
+    time_slider.maximumValue = 0;
 }
 
 - (void)viewDidDisappear:(BOOL)animated
@@ -152,7 +155,9 @@ - (void)viewDidLayoutSubviews
         video_height_constraint.constant = view_height;
     }
 
-    time_slider.frame = CGRectMake(time_slider.frame.origin.x, time_slider.frame.origin.y, toolbar.frame.size.width - time_slider.frame.origin.x - 8, time_slider.frame.size.height);
+    // Breaks Slider display/usage. FIXME: What was this for initially?
+    // time_slider.frame = CGRectMake(time_slider.frame.origin.x, time_slider.frame.origin.y, toolbar.frame.size.width - time_slider.frame.origin.x - 8, time_slider.frame.size.height);
+
 }
 
 static void video_dimensions_changed (GstPlayer * unused, gint width, gint height, VideoViewController * self)
@@ -198,6 +203,7 @@ static void duration_changed (GstPlayer * unused, GstClockTime duration, VideoVi
 
 -(void) durationChanged:(NSInteger)duration
 {
+    time_slider.minimumValue = 0;
     time_slider.maximumValue = duration;
     [self updateTimeWidget];
 }
-- 
2.15.1 (Apple Git-101)

Created attachment 371155 [details] [review]
Patch proposed to fix slider usage

Review of attachment 371155 [details] [review]:

::: playback/player/ios/GstPlay/VideoViewController.m
@@ +157,3 @@
 
+    // Breaks Slider display/usage. FIXME: What was this for initially?
+    // time_slider.frame = CGRectMake(time_slider.frame.origin.x, time_slider.frame.origin.y, toolbar.frame.size.width - time_slider.frame.origin.x - 8, time_slider.frame.size.height);

Please just remove it if it does not make any sense and breaks things

Created attachment 371667 [details] [review]
Various improvements to the ios playback example

Here is a patch that adresses various other issues. Read further in commit log for details.

All the changes are also done in atomic commits and can be found here: https://github.com/tchakabam/gst-examples/commits/ios-player-improvements

Git log ->

commit c7a43241a82e4aacbed5e38b42adaa17ff3e3add (HEAD -> ios-player-improvements, tchakabam/ios-player-improvements)
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 13:36:47 2018 +0200

    ios player: add HLS test streams from video-dev (Hls.js org)

commit ce1f298e7860a4ebf73cab5712ca921dddaff19d
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 13:35:48 2018 +0200

    ios playback: introduce macro to enable photos/ library

    Until now the photo library integration is broken (that API was
    deprecated by Apple) and the iTunes integration is better to have
    optional to put our test files in the forefront (and have better way to
    browse large iTunes libs).

commit 15c5ba79b8adf50e790f8688d57adbbcbd68c0c9
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 11:59:39 2018 +0200

    ios playback: Xcode project: Force Dwarf debug symbols (build time speedup)

    Until now it was using dSYM by default. Each build was taking forever.

commit a94c8c22af8115843a8c71803f5e120e8d523994
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 11:58:00 2018 +0200

    ios playback: initialize slider value (position) at 0 at first

    Until now the slider was displaying center position before playback was
    started.

commit d1e3e4644f3fbd8aa359db0e7ad1582d87c1c83f
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 11:57:05 2018 +0200

    ios playback: initialize slider min/max values at zero at first

commit 60b584e9c1dc769b3fbb8d1567ea1a12454a9288
Author: Stephan Hesse <tchakabam@gmail.com>
Date:   Fri May 4 11:52:31 2018 +0200

    ios playback: remove time_slider.frame forced set (fix for non-functional slider UI)

    It's unclear why this line was there, but it renders the slider
    unresponsive currently

Merged from your GIT branch