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2. Transcoding - Wikipedia

   en.wikipedia.org/wiki/Transcoding

   This size and color reduction improves the user experience on the target device, and is sometimes the only way for content to be sent between different mobile devices. Transcoding is extensively used by home theatre PC software to reduce the usage of disk space by video files.

3. Video file format - Wikipedia

   en.wikipedia.org/wiki/Video_file_format

   Video is almost always stored using lossy compression to reduce the file size. A video file normally consists of a container (e.g. in the Matroska format) containing visual (video without audio) data in a video coding format (e.g. VP9) alongside audio data in an audio coding format (e.g. Opus).

4. Comparison of video codecs - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_video_codecs

   A variety of technologies soon emerged to do so. The primary goal for most methods of compressing video is to produce video that most closely approximates the fidelity of the original source, while simultaneously delivering the smallest file-size possible. However, there are also several other factors that can be used as a basis for comparison.

5. Lossy compression - Wikipedia

   en.wikipedia.org/wiki/Lossy_compression

   The compression ratio (that is, the size of the compressed file compared to that of the uncompressed file) of lossy video codecs is nearly always far superior to that of the audio and still-image equivalents. Video can be compressed immensely (e.g., 100:1) with little visible quality loss

6. HandBrake - Wikipedia

   en.wikipedia.org/wiki/HandBrake

   HandBrake's backend contains comparatively little original code; the program is an integration of many third-party audio and video libraries, both codecs (such as FFmpeg, x264, and x265) and other components such as video deinterlacers (referred to as "filters").

7. Data compression - Wikipedia

   en.wikipedia.org/wiki/Data_compression

   It has since been applied in various other designs including H.263, H.264/MPEG-4 AVC and HEVC for video coding. [11] Archive software typically has the ability to adjust the "dictionary size", where a larger size demands more random-access memory during compression and decompression, but compresses stronger, especially on repeating patterns in ...