请问DM6437中VPFE的缩放器输出图像的大小是由限制的吗？

是的，output width 需是16字节的整数倍。
• Vertical and horizontal resize ratio values (RSZ_CNT.VRSZ and RSZ_CNT.HRSZ) should be within
the range: 64 to 1024.
• Output Width:
– Should be within the maximum limit:
     • width < 1280 (if vertical resize value is in the range: RSZ_CNT.VRSZ = 64 to 512)
     • width < 640 (if vertical resize value is in the range: RSZ_CNT.VRSZ = 513 to 1024)
– Should be even
– Should be a multiple of 16 bytes (for vertical upsizing)

缩放器中的YUYV与UYVY的宏设置是颠倒的。