jpegenc: remove meta copy in jpegenc
GstVideoEncoder takes care of the Meta copy, so there is no need in jpegenc
Fixes http://gstreamer-devel.966125.n4.nabble.com/jpegenc-copy-GstMeta-twice-tt4693981.html
Edited by nian yan
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GstVideoEncoder takes care of the Meta copy, so there is no need in jpegenc
Fixes http://gstreamer-devel.966125.n4.nabble.com/jpegenc-copy-GstMeta-twice-tt4693981.html