27a275e4bbfb2e8a345ba151ab8f80d9f5963b9c

While 4 works for some samples, 3 is the correct value since 8x8 DCT is used by (m)jpeg.
FFmpeg README ------------- 1) Documentation ---------------- * Read the documentation in the doc/ directory. 2) Licensing ------------ * See the LICENSE file.
Description
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