[Discuss-gnuradio] video streaming on ofdm

[rara]

hye...
i'm using grc for video streaming of ofdm system...
i manage to transmit the video but the quality is so bad....
and sometime the video can play,but sometime it doesn't play at all...
how to improve the video quality?is it approriate to add buffer on it?
and i got this message...what does it meant??

gst-launch -v playbin uri=file:///root/rx
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind:
Stream contains no data.
Additional debug info:
gsttypefindelement.c(570): gst_type_find_element_handle_event ():
/GstPlayBin:playbin0/GstDecodeBin:decodebin0/GstTypeFindElement:typefind:
Can't typefind empty stream
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

tq



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