I'm trying to compile mediastreamer2 but I have a problem with ffmpeg.

I ran configure script, and make.

Following errors ocurred.

videoenc.c: In function 'prepare':
##videoenc.c:190: error: 'struct AVCodecContext' has no member named 'time_base'
##videoenc.c:191: error: 'struct AVCodecContext' has no member named 'time_base'
videoenc.c: In function 'prepare_h263':
##videoenc.c:207: error: 'CODEC_FLAG_AC_PRED' undeclared (first use in this function)
##videoenc.c:207: error: (Each undeclared identifier is reported only once
##videoenc.c:207: error: for each function it appears in.)
##videoenc.c:208: error: 'CODEC_FLAG_H263P_SLICE_STRUCT' undeclared (first use in this function)
videoenc.c: In function 'prepare_mpeg4':
##videoenc.c:220: error: 'CODEC_FLAG_AC_PRED' undeclared (first use in this function)
cc1: warnings being treated as errors
videoenc.c: In function 'process_frame':
videoenc.c:380: warning: implicit declaration of function 'avcodec_get_frame_defaults'
videoenc.c:381: warning: dereferencing type-punned pointer will break strict-aliasing rules
##videoenc.c:384: error: 'AV_NOPTS_VALUE' undeclared (first use in this function)

I installed libavcodec(also avformat)-devel packages.

what should I do?

thank you.
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