Video Frame Player

Sometimes we want to play a video frame by frame, so we can observe every detail, and differences between details.
Functions:
1) Step-play frames, you can easily play video/GIF forward or backward frame by frame with clicking buttons or dragging finger.
2) Extract frames, you can extract frames and save them to Photos. You can extract the current frame, you also can extract all frames between 2 time point in batch mode.
3) Support for making GIF animation from any segment of videos.
4) Support video imported by iTunes.
5) Support for zooming in/out video with 2-finger gesture to see more details.
6) Support video/gif from "Files" App.
7) Onion Skin. You can overlay the half-transparent previous and next frames on the current frame.
8) Convert FPS. You can easily convert the video to your desired FPS number in case you need it.
9) Support external(USB or Bluetooth) keyboard. You can use hotkeys to control playing conveniently.
10) Support Drawing on every frame. Your drawing can be saved automatically. And you can export your video+annotations.