如何使用udp gstreamer流式传输h264 [英] How to stream h264 with udp gstreamer
问题描述
我正在尝试使用h264流式传输视频.源是Axis相机.我设法通过多播而不是h264流式传输jpeg.
I'm trying to stream a video with h264. Source is a Axis camera. I managed to stream jpeg with multicast but not h264.
对于jpeg，我使用了以下命令:
With jpeg I used following command:
gst-launch-1.0 udpsrc uri=udp://239.194.0.177:1026 ! application/x-rtp,encoding-name=JPEG,payload=26 ! rtpjpegdepay ! jpegdec ! autovideosink
我尝试流式传输h264，但失败，使用以下命令:
I tried to stream h264 but it fails, used following command:
gst-launch-1.0 -v udpsrc host=239.194.0.177 port=1026 ! rtph264depay ! ffdec_h264 ! xvimagesink
我收到以下错误:
ERROR: pipeline could not be constructed: no element "udpsrc".
此行:
gst-launch-1.0 udpsrc uri=udp://239.194.0.177:1026 ! application/x-rtp,media=video,clock-rate=90000,encoding-name=H264 ! rtph264depay ! h264parse
我没有遇到任何错误，但是没有视频流，并且这是在终端上打印的:
I did not get any errors but no video streamed and this was printed in terminal:
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
我尝试了以下页面中的命令:
I tried the commands from following pages:
https://developer.ridgerun.com/wiki/index.php/Using_UDP_Multicast_with_GStreamer
http://labs.isee.biz/index.php/Example_GStreamer_Pipelines #H.264_RTP_Streaming
但是无法正常工作.
以verbos模式运行时，我会得到更多信息.
When running in verbos mode I get litte more info.
命令:
gst-launch-1.0 -v udpsrc uri=udp://239.194.0.177:1026 ! application/x-rtp, media=video, payload=96, encoding-name=H264 ! rtph264depay ! avdec_h264 ! videoconvert ! fakesink
输出:
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
/GstPipeline:pipeline0/GstCapsFilter:capsfilter0.GstPad:src: caps = "application/x-rtp\,\ media\=\(string\)video\,\ payload\=\(int\)96\,\ encoding-name\=\(string\)H264\,\ clock-rate\=\(int\)90000"
/GstPipeline:pipeline0/GstRtpH264Depay:rtph264depay0.GstPad:sink: caps = "application/x-rtp\,\ media\=\(string\)video\,\ payload\=\(int\)96\,\ encoding-name\=\(string\)H264\,\ clock-rate\=\(int\)90000"
如何使用gstreamer通过多播传输H264?
How do I stream H264 via multicast with gstreamer?
推荐答案
评论太久了-既然没有人回答，请把这个想法草稿作为答案.
Too long for comment - and since nobody is answering posting this draft of thoughts as answer..
关于没有元素udpsrc的第一个错误确实很奇怪.但是我认为它抱怨缺少uri参数.您使用的是哪个版本?我没有udpsrc的host参数.
The first error about no element udpsrc is really weird. But I think its complaining about missing uri parameter. What version are you using? I do not have the host parameter for udpsrc..
在第三个管道中，它以h264parse结尾-这是错字吗?您需要解码h264 ..而不只是解析它:
In third pipeline it ends with h264parse - is this s typo? you need to decode the h264.. not just parse it:
gst-launch-1.0 udpsrc uri=udp://239.194.0.177:1026 ! application/x-rtp,media=video,clock-rate=90000,encoding-name=H264 ! rtph264depay ! h264parse ! avdec_h264 ! videoconvert ! autovideosink
还可以通过运行GST_DEBUG=3 gst-launch-1.0 ....来添加一些日志(如果太长，则可以使用pastebin).
Also add some logs (maybe with pastebin if too long) with running GST_DEBUG=3 gst-launch-1.0 .... or so.
这是什么意思:
但是无法正常工作
But could not get it to work
这并不过分；)
通常，在使用rtp时，您需要提供真正的所有功能，否则它可能根本无法链接或无法播放.
Usually when working with rtp you need to provide really all capabilities otherwise it may not link or play at all..
也许可以尝试使用uridecodebin?不确定是否是最好的主意:
Maybe try with uridecodebin? Not sure if its the best idea:
gst-launch-1.0 uridecodebin uri=udp://etcetc:port ! videoconvert ! autovideosink
如果您有任何新的信息/问题，请将它们添加为更新，以使整个图片(也适用于其他人.)
If you get any new infos/questions add them as updates to make the picture whole (for others as well..)
HTH
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