video compression

Compressed Video Format

Summary

A good compressed video is one that is encoded and compressed using a technique where the file size is reduced without losing its original quality. Different formats use different algorithms for file compression.

Key Points

- Selecting the right compression format depends on file requirements and playback device.
- Top 5 commonly used formats for video compression:
1. H.264 (MPEG-4 AVC)
- Offers high-quality files at lower bit rates.
- Compatible with many players and devices.
- Suitable for Blu-ray disc playback.
2. DivX
- Developed by DivX, LLC.
- Shrinks video files into small size while maintaining high quality.
- Uses 3 codecs.
3. MP4
- Universal format compatible with most players and devices.
- Compresses videos into smaller file size while keeping decent quality.
- Compatible with almost all versions of MPEG-4 and H.264.
4. AVI
- Multimedia container format offering high-quality compressed files.
- Supports multiple audio and video files.
- Supports a wide range of codecs.
5. WMV
- Developed by Microsoft as part of the Windows Media Framework.
- Ideal for file compression to send large files over email and other sources with file size limitations.
- May result in loss of quality.

HEVC Compression Results

Overview

HEVC compression was tested on two videos, with the first being 8 megs and the second 1.6 megs after compression.

Steps

- Rendered the second video at 352x288 resolution.

Notes

- The first video is very clean and full screen with detailed quality but has a delay on playback.
- The decision was made to use the lower resolution for illustration of the idea but not for any detail.

Posting Videos on Forumla Site

Overview

A 14 meg video was posted on the plasma build post.

Steps

- Video was posted on the forum at https://forumla.us/community/older-cnc-table-retrofit/conversion-to-myplasma-cnc/#post-192