Suggested Compression Ratio with H.264?

Question

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Answer 1

Compression Ratio Rules of Thumb
Compression ratios to maintain excellent quality:
– 10:1 for general images using JPEG
– 30:1 for general video using H.263 and MPEG-2
– 50:1 for general video using H.264 / MPEG-4 AVC

from http://www.kanecomputing.co.uk/pdfs/compression_ratio_rules_of_thumb.pdf