If user wants to present multiple files as a single seamless source and/or to use only a part of a file, then one can utilize a playlist feature for that purpose.
See the documentation page for detailed explanation of this feature.
VASTreaming library provides user with several utilities for manipulating mp4 files directly from a user code.
AudioMixer allows mixing audio tracks of two or more mp4 files into one output audio track. Video is copied from the first source file.
Concatenator - a utility for splicing of two or more mp4 files. It is also can be used for cutting one file if user sets only one file as a parameter and indicates start and end timestamps for this file.
ImageExtractor is intended for extracting of an image from a previously set position of an original mp4 file and saving it as a JPEG image.
VideoMixer is intended for mixing source mp4 file with one or more images including animated images e.g., GIFs.
See the documentation page for details.
Don't hesitate to contact us to request a demo applications and a demo projects.