Convert H.264 based input container format file into H.265 format
gst-launch-1.0 filesrc location="input-h264-file.mp4" ! qtdemux name=demux demux.video_0 ! h264parse ! video/x-h264, alignment=au ! omxh264dec low-latency=0 ! omxh265enc ! video/x-h265, alignment=au ! filesink location="output.h265"