[gstreamer-bugs] x264enc with v4l2src problem ?

[又鋼]

Is x264enc has a bug with v4l2src (or ksvideosrc in windows) ?

gst-launch videotestsrc ! ffmpegcolorspace ! timeoverlay ! x264enc !
ffdec_h264 ! autovideosink
capture form the videotestsrc is work fine

but capture from the v4l2src or ksvideosrc:
gst-launch v4l2src ! ffmpegcolorspace ! timeoverlay ! x264enc ! ffdec_h264 !
autovideosink
the Video is lag

other Video Encoding theoraenc / theoradec is work fine:
gst-launch v4l2src ! ffmpegcolorspace ! timeoverlay ! theoraenc ! theoradec
! autovideosink

how can I make x264enc as smooth as theoraenc ?

thx @@
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