Shrinking X265 |best| Access

-pix_fmt yuv420p10le : Ensures 10-bit output for better compression efficiency.

If you have a massive library of x265 videos and want to free up storage space without degrading the viewing experience, this comprehensive guide will teach you how to shrink your files efficiently using open-source tools and optimized encoding parameters. Why Shrink x265? Understanding the Math shrinking x265

If you want to squeeze absolutely every megabyte out of your files, consider applying these advanced techniques: Use 10-bit Encoding (Even for 8-bit Sources) -pix_fmt yuv420p10le : Ensures 10-bit output for better

Do not try to force a 50GB 4K Blu-ray down to 1GB. It will look terrible. Aim for a balanced target: a high-quality 1080p movie should generally sit comfortably between 1.5GB and 3GB, while a crisp 4K movie fits well between 8GB and 12GB. Understanding the Math If you want to squeeze

Navigate to the tab. This is where the most critical adjustments are made:

By default, x265 reduces bit allocation in areas of high motion. While efficient on paper, this often leads to ugly macroblocking during fast action sequences. Adding --no-aq-motion forces the encoder to maintain structural integrity during complex movement. 3. Adjusting Sample Adaptive Offset ( --no-sao )