The MKV Format
An MKV file is a video file saved in the Matroska multimedia container format. It supports several types of audio and video codecs and may include .SRT, .SSA, .USF (Universal Subtitle Format), or VobSub subtitles. MKV files are typically used for storing short video clips, TV shows, and movies.
The MP3 Audio Format
MP3 stands for "MPEG Audio Layer-3" and is a compressed audio file format originally released by the Moving Picture Experts Group. A typical MP3 file sounds similar to the original recording using less disk space at the same time due to the applied compression.
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