gst-ffmpeg: fix windows build
gst-ffmpeg: fix windows build

atsushieno/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,AlertMe/cerbero,sdroege/cerbero,jackjansen/cerbero-2013,OptoFidelity/cerbero,ford-prefect/cerbero,flexVDI/cerbero,jackjansen/cerbero-2013,ylatuya/cerbero,jackjansen/cerbero,sdroege/cerbero,nzjrs/cerbero,nicolewu/cerbero,GStreamer/cerbero,ikonst/cerbero,ikonst/cerbero,GStreamer/cerbero,EricssonResearch/cerbero,flexVDI/cerbero,AlertMe/cerbero,nicolewu/cerbero,centricular/cerbero,fluendo/cerbero,nzjrs/cerbero,nzjrs/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,EricssonResearch/cerbero,BigBrother-International/gst-cerbero,nzjrs/cerbero,ylatuya/cerbero,justinjoy/cerbero,lubosz/cerbero,nirbheek/cerbero,cee1/cerbero-mac,lubosz/cerbero,GStreamer/cerbero,nirbheek/cerbero-old,atsushieno/cerbero,AlertMe/cerbero,justinjoy/cerbero,ramaxlo/cerbero,atsushieno/cerbero,fluendo/cerbero,superdump/cerbero,BigBrother-International/gst-cerbero,jackjansen/cerbero-2013,multipath-rtp/cerbero,justinjoy/cerbero,jackjansen/cerbero-2013,cee1/cerbero-mac,davibe/cerbero,atsushieno/cerbero,nzjrs/cerbero,centricular/cerbero,multipath-rtp/cerbero,ramaxlo/cerbero,brion/cerbero,nirbheek/cerbero-old,fluendo/cerbero,jackjansen/cerbero,davibe/cerbero,ylatuya/cerbero,davibe/cerbero,AlertMe/cerbero,atsushieno/cerbero,BigBrother-International/gst-cerbero,ramaxlo/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,OptoFidelity/cerbero,ylatuya/cerbero,flexVDI/cerbero,cee1/cerbero-mac,sdroege/cerbero,EricssonResearch/cerbero,jackjansen/cerbero,nirbheek/cerbero-old,sdroege/cerbero,ikonst/cerbero,sdroege/cerbero,nicolewu/cerbero,superdump/cerbero,GStreamer/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,fluendo/cerbero,jackjansen/cerbero-2013,centricular/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,EricssonResearch/cerbero,lubosz/cerbero,superdump/cerbero,fluendo/cerbero,BigBrother-International/gst-cerbero,ikonst/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,centricular/cerbero,superdump/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ramaxlo/cerbero,nirbheek/cerbero,shoreflyer/cerbero,shoreflyer/cerbero,GStreamer/cerbero,nirbheek/cerbero-old,flexVDI/cerbero,ikonst/cerbero,brion/cerbero,multipath-rtp/cerbero,flexVDI/cerbero,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,brion/cerbero,ford-prefect/cerbero,BigBrother-International/gst-cerbero,justinjoy/cerbero,brion/cerbero,multipath-rtp/cerbero,shoreflyer/cerbero,EricssonResearch/cerbero,OptoFidelity/cerbero,jackjansen/cerbero,ramaxlo/cerbero,freedesktop-unofficial-mirror/gstreamer__sdk__cerbero,shoreflyer/cerbero,brion/cerbero,AlertMe/cerbero,nirbheek/cerbero,nirbheek/cerbero,multipath-rtp/cerbero,lubosz/cerbero,shoreflyer/cerbero,centricular/cerbero,cee1/cerbero-mac,freedesktop-unofficial-mirror/gstreamer-sdk__cerbero,ford-prefect/cerbero,OptoFidelity/cerbero,davibe/cerbero,freedesktop-unofficial-mirror/gstreamer__cerbero,ford-prefect/cerbero