Hi, My dear friends!
my english is not good,So I use translation software,hope you can understand.
Krpano is a great product, but I run into problems when using the Krpano, hope can get help, thank you!

I'm going to the krpano Viewer(Version 1.19) embedded in Windows WebBrowser control.
krpano HTML5 viewer:(Windows7 IE11.0)
1. When use IE browser mp4 files greater than 2048x1024 resolution encountered Error: loading video failed!
2. WebBrowser control using the demo, mp4, video playback is not smooth, play a frame pauses for a second Then the next frame.

flash viewer:
When using a flash mode effect is very good, but I don't know how to control the video playback speed.

Can you tell me what to do to solve these problems, thank you once again.