iPhone output hangs up

Question:

Windows 8.1 Core-i3/i5/i7

iPhone or mp4(Intel® Quick Sync Video)output hangs up
while required time is being calcurated.

Answer:

Intel drivers need to be updated to the latest.

When this is not possible,
select Use the CPU to encode, not Use Intel® Quick Sync Video to encode.

As for MP4, you need to select MP4, not MP4(Intel® Quick Sync Video).

(Reference)
Contact Intel directly for the use of Intel® Driver Update Utility.
http://www.intel.com/p/en_US/support/detect