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vepu h264 input stride must be aligned to 8 for vepu limitation. If it is not 8 aligned some buffer conversion preprocess should be done before the buffer is sent encoder. 1. The hor_stride in vepu hardware is in pixel unit not byte unit. 2. The hor_stride in vepu must be 8 pixels aligned. 3. The YUV420P should be 16 pixels aligned for chroma. 4. Fix log print when hor_stride != width 8align Change-Id: If30136a4673399c3be40a41a055e832db4c321d5 Signed-off-by: sayon.chen <sayon.chen@rock-chips.com>