[Bug 767176] x264enc: hangs when seeking

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=767176

--- Comment #3 from Tim-Philipp Müller <t.i.m at zen.co.uk> ---
with gstreamer-vaapi decoders this hangs (never prerolls the first time):

gst-launch-1.0 uridecodebin
uri=file:///home/tpm/samples/misc/the-great-gatsby-720p-trailer.mov ! navseek !
videoconvert ! x264enc ! decodebin ! videoconvert ! xvimagesink

while this works fine (incl. seeking)

gst-launch-1.0 uridecodebin
uri=file:///home/tpm/samples/misc/the-great-gatsby-720p-trailer.mov ! navseek !
videoconvert ! x264enc tune=zerolatency ! decodebin ! videoconvert !
xvimagesink

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