我正在Windows 10上使用gstreamer来获得RTSP视频流。
C:\opt\gstreamer\1.0\x86_64\bin\gst-launch-1.0.exe rtspsrc location="rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov" latency=0 name=src src. ! decodebin3 ! autovideosink
此命令可以正常工作并在某个时间显示视频（〜25％），但也经常导致错误（〜75％），如下所示：
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Progress: (open) Opening Stream
Progress: (connect) Connecting to rtsp://wowzaec2demo.streamlock.net/vod/mp4:BigBuckBunny_115k.mov
Progress: (open) Retrieving server options
Progress: (open) Retrieving media info
Progress: (request) SETUP stream 0
Progress: (request) SETUP stream 1
Progress: (open) Opened Stream
Setting pipeline to PLAYING ...
New clock: GstSystemClock
Progress: (request) Sending PLAY request
Progress: (request) Sending PLAY request
Progress: (request) Sent PLAY request
Missing element: MPEG-4 AAC decoder
ERROR: from element /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0/GstParseBin:parsebin0: Your GStreamer installation is missing a plug-in.
Additional debug info:
../gst/playback/gstparsebin.c(3487): gst_parse_bin_expose (): /GstPipeline:pipeline0/GstDecodebin3:decodebin3-0/GstParseBin:parsebin0:
no suitable plugins found:
Missing parser: MPEG-4 AAC (audio/mpeg, mpegversion=(int)4, stream-format=(string)raw, codec_data=(buffer)1490, framed=(boolean)true, level=(string)1, base-profile=(string)lc, profile=(string)lc, rate=(int)12000, channels=(int)2)
Execution ended after 0:00:00.437721400
Setting pipeline to PAUSED ...
Setting pipeline to READY ...
Setting pipeline to NULL ...
Freeing pipeline ...
我想知道为什么错误消息显示“您的GStreamer安装缺少插件”（视频将永远不会显示）。
RTSP的来源看起来不错（ffmpeg中的ffplay完美地显示了视频）。管道中有任何错误，我该如何解决？