One supports video compression video cropping image compression video transcoding video extraction audio video angle rotation video removal audio video speed video merge stitching video to GIF video rewind multiple pictures to GIF etc.Functional App.Keep the resolution unchanged and compress the compressed video and the original video have almost the same resolution.Support 4k 2k 1080p 720p compression.Support large file video compression support video compression above 2G.Video format conversion function-convert video to high-quality mp4 format-support most formats of video transcoding support MKV FLV RMVB 3GP MPEG WMV MOV to MP4 AVI FLV MOV extract videoThe audio in is saved as mp3 and stored to the sd card.