1、播放avi文件
gst-launch-1.0 filesrc location=test.avi! avidemux name=demux demux.audio_00! decodebin ! audioconvert! audioresample ! alsasink demux.video_00! queue ! decodebin! videoconvert ! videoscale! ximagesink
gst-launch-1.0 filesrc location=test.avi! avidemux name=demux demux.video_00! queue ! decodebin! video/x-raw-yuv ! autovideoconvert ! videoscale! video/x-raw-rgb,width=1024,height-768 ! ximagesink