[rtmpdump] Stream plays like Fast Forvarding in beginning

[Vaidas Velutis]

Hello, i have this stream:
http://hwcdn.net/y5s5i2w8/fls/236848-TDKTV.smil(this url gives RTMP
stream params), so i am downloading stream with
rtmpdump 2.3 using this command line:

rtmpdump.exe -r "rtmp://
fms055.am4.hwcdn.net/y5s5i2w8/_definst_/fls/236848-TDKTV?doppl=0545b65f49738724&dopsig=da6655d4d5459ebd963886abd039a6a6"
-v -V -o "tdk.flv"

everything seems ok, it is downloading well, but when i watch downloaded
stream first seconds (about 4 - 6 second from beginning) is playing like it
is fast forwarding. Can this be fixed, or maybe someone can explain why this
is happening?
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