[FFmpeg-user] How to Use FFmpeg Decode Libraries

[Myth]

Hi All,
 I want to use FFmpeg decode libraries to decode an h.264 video stream. I found the libavcodec/api-example.c is a test example can decode MPEG1VIDEO format video streams. Now I use CODEC_ID_H264 instead of CODEC_ID_MPEG1VIDEO and build it, then add an argument (h.264 encode video stream) when ran the test case, there an error occurs. Below is the error log:
  
 #Video decoding
#[h264 @ 0x8937020]error while decoding MB 14 7, bytestream (-23)
#[h264 @ 0x8937020]concealing 955 DC, 955 AC, 955 MV errors
#[h264 @ 0x8937020]no frame!
#Error while decoding frame 0
  
 Who can help me to resolve this issue?
Any feedback is appreciated.
 Regards,
Xin