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RE: LeoThread 2024-09-21 06:33

in LeoFinance • 2 months ago

I Prompted ChatGPT: Give me example of the difference in file size of a 1GB high motion video between all different crf qualities.

Response:

The file size of a video depends on several factors, including the CRF value, the resolution, frame rate, and video content. Here's an estimated comparison of the file size differences for a 1GB high-motion video at various CRF values using the H.265 codec:

CRF ValueApproximate File Size
CRF 18~1.2 GB (larger than the original, near lossless)
CRF 20~900 MB to 1GB (similar to original, high quality)
CRF 23~700 MB to 800 MB (slightly reduced file size, good quality)
CRF 25~600 MB to 700 MB (noticeably smaller file size, still decent quality)
CRF 28~400 MB to 500 MB (significant reduction, quality loss may be visible)

2 months ago in LeoFinance by
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     2 months ago  

    Key Points:

    • CRF 18 results in larger files because it prioritizes quality over compression.
    • CRF 23 tends to reduce the file size by around 20–30% with minimal quality loss.
    • CRF 28 and higher values result in smaller files, but visual artifacts may become noticeable, especially in high-motion scenes.

    This table gives rough estimates, as actual file sizes can vary depending on the specific content of the video.

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       2 months ago  

      Comments on ChatGPT's Response:

      I used CRF 22 on a video, and 1 hour of content of a high motion, 40 FPS video used up to 4GB of space.

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