Convert H.265 based input container format file into H.264 format
gst-launch-1.0 filesrc location="input-h265-file.mp4" ! qtdemux name=demux demux.video_0 ! h265parse ! video/x-h265, alignment=au ! omxh265dec low-latency=0 ! omxh264enc ! video/x-h264, alignment=au ! filesink location="output.h264"