Adobe Premiere Pro CC does not support importing FLV files directly into your project, though you can import F4V files directly.
To work FLV/F4V in Adobe Premiere Pro, you'll need to convert FLV files to something editable like MPEG-2 for Premiere Pro.
How to solve this problem? Just watch the following tutorial.
VirtualDub dedicates to processing AVI files and can be extended with third-party video filters. Although it's not so fully-featured as other professional video editors, it certainly can accomplish more than a few tasks that you might think you need other separate applications for. As you may know, VirtualDub, as stand-alone, cannot handle MP4, MKV, FLV, MOV or any other files besides AVI. And that's why you will encounter problems when you try to open MP4 files in VirtualDub.Then, how to get MP4 files and VirtualDub to play nicely? Don't worry! Just watch this tutorial.
H.265 is a new codec that has been growing in popularity since its recent unveil. It has proven to be faster and much more efficient than H.264 and in a few years there's a good chance we're all going to be using it. Since the latest H.265 HEVC compression algorithms over the H.264 and with more key improvements, many users would be eager to convert H.264 to H.265 for saving storage space while keeping original quality.
Then how to convert H.264 to H.265 video?