Gstreamer RTSP 服务器

Question

我想使用 Gstreamer 1.0 (gst-launch-1.0) 设置 RTSP 服务器流。

我的“服务器”目前看起来像这样

gst-launch-1.0.exe videotestsrc  ! x264enc ! rtph264pay ! udpsink host=localhost port=5000

我的客户看起来像这样

gst-launch-1.0.exe udpsrc port=5000 ! rtpmp2tdepay ! decodebin ! autovideosink

两个命令都运行没有错误，但我在“客户端”上看不到任何视频。此外，我知道我的命令只是通过 RTP 将 H.264 编码的视频流式传输到 UDP 端口。

我在 UDP 端口 5000 上看到了一些数据，因此我假设发送方部分是正确的。

我的问题：

1. 我在接收端做错了什么？
2. 如何设置 gst-launch-1.0 以提供 RTSP 流（带有元信息 .sdp 文件）？

编辑（2014-03-24）： 发送端调试输出：

gst-launch-1.0.exe -v videotestsrc ! x264enc ! rtph264pay ! udpsink host=localhost port=5000
Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
/GstPipeline:pipeline0/GstVideoTestSrc:videotestsrc0.GstPad:src: caps = video/x-raw, framerate=(fraction)30/1, width=(int)320, height=(int)240, format=(string)I420, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:sink: caps = video/x-raw, framerate=(fraction)30/1, width=(int)320, height=(int)240, format=(string)I420, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
Redistribute latency...
/GstPipeline:pipeline0/GstX264Enc:x264enc0.GstPad:src: caps = video/x-h264, codec_data=(buffer)01640014ffe1001967640014acd94141fb0110000003001000000303c8f142996001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)2, profile=(string)high, width=(int)320, height=(int)240, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:src: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, sprop-parameter-sets=(string)"Z2QAFKzZQUH7ARAAAAMAEAAAAwPI8UKZYA\=\=\,aOvssiw\=", payload=(int)96, ssrc=(uint)383435573, timestamp-offset=(uint)786392204, seqnum-offset=(uint)781
/GstPipeline:pipeline0/GstUDPSink:udpsink0.GstPad:sink: caps = application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264, sprop-parameter-sets=(string)"Z2QAFKzZQUH7ARAAAAMAEAAAAwPI8UKZYA\=\=\,aOvssiw\=", payload=(int)96, ssrc=(uint)383435573, timestamp-offset=(uint)786392204, seqnum-offset=(uint)781
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0.GstPad:sink: caps = video/x-h264, codec_data=(buffer)01640014ffe1001967640014acd94141fb0110000003001000000303c8f142996001000568ebecb22c, stream-format=(string)avc, alignment=(string)au, level=(string)2, profile=(string)high, width=(int)320, height=(int)240, pixel-aspect-ratio=(fraction)1/1, framerate=(fraction)30/1
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: timestamp = 786392204
/GstPipeline:pipeline0/GstRtpH264Pay:rtph264pay0: seqnum = 781
Pipeline is PREROLLED ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

接收方：

gst-launch-1.0.exe -vvv udpsrc port=5000 ! "application/x-rtp, media=video, clock-rate=90000, encoding-name=H264, payload=96" ! queue ! rtph264depay ! queue ! decodebin ! autovideosink sync=false
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock

谢谢！

Answer 1

问题#1。您在发送端使用rtph264pay，但在接收端使用rtpmp2tdepay。您需要使用rtph264depay。

问题#2。您需要为rtph264depay 提供正确识别视频格式的功能。
要获得正确的功能，只需使用-v 标志运行发送代码并将特定于 rtp 的上限复制到接收管道。

gst-launch-1.0 udpsrc port=5000 ! "application/x-rtp, media=video, clock-rate=90000, encoding-name=H264, payload=96" ! rtph264depay ! decodebin ! autovideosink