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Apple Pro Training Series Compressor Quick-Reference Guide by Brian Gary

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9. Format Conversions

Format conversions (also known as standards conversions) are the results of transcoding source media in one format into another format.

A golden rule of transcoding is that higher-quality source media produces better-quality output. You will produce significantly better results transcoding from HD to SD, from larger frames to smaller ones (such as 1280×720 to 320×240), and from uncompressed to compressed formats (10-bit to DV). You’ll produce lower-quality results by transcoding any of those examples in reverse.

HD to SD DVD Downconversions

Material shot in any HD format (including HDV) has stunning quality compared with the SD video formats. The downside is that HD formats currently have far fewer distribution options than ...

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