hello , i used ffmpeg in my Xcode and here is the error and i Cant solve. "thread count is 1 [IMGUTILS @ 0xb0114c08] Picture size 0x704 is invalid [swscaler @ 0xfa59400] deprecated pixel format used, make sure you did set range correctly [swscaler @ 0xfa59400] 0x704 -> 0x704 is invalid scaling dimension" could you give me some help! thank you very much !!!