Main Formats and Subtitle Types of Online Videos
1. Video Formats
AVI, fully known as Audio Video Interleaved, is one of the common video formats, a multimedia container format published by Microsoft.
MP4 (MPEG-4 Part 14) is the common multimedia container format used to store audio, video and the other media information. It can be played in almost all media players.
MKV is the multimedia container format. MKV can contain various coding, video, audio and subtitle streams. Videos and audios in different formats, multiple language subtitles can be contained in one file.
RMVB (RealMedia Variable Bitrate) is a variable bitrate extension of the RealMedia multimedia digital container format developed by RealNetworks. It is always used in animation videos and Asian films.
2. Subtitle Types
Hard subtitles (embedded)
In this type, the subtitle text is added into the original video frames. Once the video is played, the subtitles will be shown. But these subtitles cannot be deleted, switched or edited.
Soft subtitles (internal, external subtitles)
Soft subtitles are divided into external and internal subtitles. External subtitles mean the separate files and the file formats are various. You can add or edit the subtitle file to the video at any time. That ensures the video screen will not be spoiled by subtitles.
Internal subtitles are rooted in a video. They can be downloaded and copied along with the video. For example, a MKV can contain two or more available subtitle files. If necessary, the subtitle files can be separated, edited and replaced.
|AVI||Soft subtitles (external, internal subtitles)|
|MKV||Soft subtitles (external, internal subtitles)|
|MP4||Hard subtitles (embedded)|
|RMVB||Hard subtitles (embedded)|