vTool2 at Mac App Store analyse

vTool, the small video manipulating tool. A small GUI frontend of FFmpeg for macOS. vTool is a small utility developed to help people deal with almost all kinds of video files in daily life easy and efficient. With help of the app, extract audio from video, scale video, crop video, merge multiple video files together, sync video with audio and subtitle file, reduce video to limited file size, and more such type of common video handling tasks, can be accomplished by several clicks. vTool can handle common video formats including MP4, M4V, MOV, MKV, WMV, FLV, SWF, AVI, VP8, VP9, MPG, and GIF etc, and common audio formats such as MP2, MP3, Ogg, AAC, Opus, Speex, AMR, GSM, Wavpack, and WAV etc. Common Video Manipulating Tasks ------------------------------------ a. Fetch video information, such as format, resolution, duration, etc. b. Extract audio from video file. c. Extract video segment by start and end time stamp. d. Remove audio from video file. e. Scale video up or down. f. Crop video by offset. g. Merge video segments together. h. Combine video with audio. i. Extract one image from the video file. j. Convert video format. k. flip video horizontally or vertically or rotate with a degree. l. speed up or slow down input video. m. adjust video frame rate, audio volume. n. convert video to black and white style. o. reduce video file size by adjust CRF scale. p. generate a silent audio wav file with duration in seconds. q. generate a silent one picture video file with duration in seconds. r. Setup meta info for a video file. s. Create watermark for a video file. t. Convert gif file to mp4. u. Reduce video to limited file size. v: Video overlay with a .png mask file. ...