[FFmpeg-user] [mpeg1video @ 0x7fb9ae801800] Invalid frame dimensions 0x0.

[邓超]

hi all,


I run the example "doc/examples/decode_video.c", but get the error
"[mpeg1video @ 0x7fb9ae801800] Invalid frame dimensions 0x0.
Error sending a packet for decoding".
The command is:
./frame2ppm ../nanyou.mp4 ../hellodeng
I'm on mac, the code is just the example code, I change nothing!
Does anyone know why? 
Thanks a lot


chao