On Sun, Aug 17, 2014 at 14:27:27 +0800, Han Jiang wrote: > libavformat/libavformat.a(librtmp.o): In function `rtmp_read_seek': > librtmp.c:(.text+0x30): undefined reference to `RTMP_SendSeek' Does your linking command line which is throughing this error even have "-lrtmp" or librtmp.a in it? Moritz