Question

我有以下管道来播放视频：

发件人：

gst-launch-1.0 rpicamsrc preview = 0！ 'video / x-h264，width = 1280，height = 720，framerate = 15/1，profile = high'！排队！ rtph264pay！ udpsink host = 192.168.0.8 port = 50000

接收器：

gst-launch-1.0 udpsrc port = 50000 caps =“application / x-rtp，media =（string）video，clock-rate =（int）90000，encoding-name =（string）H264”！ rtph264depay！ decodebin！ autovideosink

这很好用，但是我想在python中使用接收器，并将视频流引导到一个窗口，不管怎么样：

import gi
gi.require_version('Gst', '1.0')
from gi.repository import GObject, Gst, Gtk, GdkX11,GstVideo

GObject.threads_init()
Gst.init(None)

class VideoReceiver:
  def __init__(self):

    self.window = Gtk.Window()
    self.window.connect('destroy', self.stop)
    self.window.set_default_size(320, 200)

    self.drawingarea = Gtk.DrawingArea()
    self.window.add(self.drawingarea)

    self.window.show_all()
    self.xid = self.drawingarea.get_property('window').get_xid()

    self.pipeline = Gst.parse_launch ('udpsrc name=udpsrc port=50000'
                                      ' caps="application/x-rtp, media=(string)video, clock-rate=(int)90000, encoding-name=(string)H264" ! '
                                      'rtph264depay ! decodebin ! autovideosink')

    self.bus = self.pipeline.get_bus()
    self.bus.add_signal_watch()
    self.bus.connect('message::error', self.on_error)

    self.bus.enable_sync_message_emission()
    self.bus.connect('sync-message::element', self.on_sync_message)

  def start(self):
    self.pipeline.set_state(Gst.State.PLAYING)
    Gtk.main()

  def stop(self, window):
    self.pipeline.set_state(Gst.State.NULL)
    Gtk.main_quit()

  def on_sync_message(self, bus, msg):
    if msg.get_structure().get_name() == 'prepare-window-handle':
        print('prepare-window-handle')
        msg.src.set_property('force-aspect-ratio', True)
        msg.src.set_window_handle(self.xid)

  def on_error(self, bus, msg):
    print('on_error():', msg.parse_error())

vr1=VideoReceiver()
vr1.start()

但是窗口只是在流式传输开始时关闭，程序结束时没有错误。任何想法可能是错的，我怎么能将视频输出引导到窗口？

如果没有root权限运行，则输出：

$ GST_DEBUG = 3 python3.2 test.py

** (test.py:3275): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
prepare-window-handle
0:00:04.134038733  3275  0x1c72260 ERROR            egladaption gstegladaptation_egl.c:311:gst_egl_adaptation_create_surface:<autovideosink0-actual-sink-eglgles> Can't create surface
0:00:04.135032949  3275  0x1c72260 ERROR            egladaption gstegladaptation.c:461:gst_egl_adaptation_init_surface:<autovideosink0-actual-sink-eglgles> Can't create surface
0:00:04.135378104  3275  0x1c72260 ERROR            egladaption gstegladaptation.c:657:gst_egl_adaptation_init_surface:<autovideosink0-actual-sink-eglgles> Couldn't setup EGL surface
0:00:04.135678780  3275  0x1c72260 ERROR            eglglessink gsteglglessink.c:2132:gst_eglglessink_configure_caps:<autovideosink0-actual-sink-eglgles> Couldn't init EGL surface from window
0:00:04.135971436  3275  0x1c72260 ERROR            eglglessink gsteglglessink.c:2144:gst_eglglessink_configure_caps:<autovideosink0-actual-sink-eglgles> Configuring caps failed
0:00:04.137130443  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.137830336  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.138175544  3275  0x1c78a60 WARN                GST_PADS gstpad.c:3620:gst_pad_peer_query:<sink:proxypad1> could not send sticky events
0:00:04.157868139  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.158217826  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.158321940  3275  0x1c78a60 WARN                GST_PADS gstpad.c:3620:gst_pad_peer_query:<sink:proxypad1> could not send sticky events
0:00:04.184023215  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.184216600  3275  0x1c78a60 WARN                GST_PADS gstpad.c:3620:gst_pad_peer_query:<sink:proxypad1> could not send sticky events
0:00:04.185187274  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.185499825  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.186118000  3275  0x1c78a60 WARN             omxvideodec gstomxvideodec.c:2817:gst_omx_video_dec_loop:<omxh264dec-omxh264dec0> error: Internal data stream error.
0:00:04.186551488  3275  0x1c78a60 WARN             omxvideodec gstomxvideodec.c:2817:gst_omx_video_dec_loop:<omxh264dec-omxh264dec0> error: stream stopped, reason not-negotiated
0:00:04.187462163  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
0:00:04.187758151  3275  0x1c78a60 ERROR            eglglessink gsteglglessink.c:2167:gst_eglglessink_setcaps:<autovideosink0-actual-sink-eglgles> Failed to configure caps
on_error(): (GError('Internal data stream error.',), 'gstomxvideodec.c(2817): gst_omx_video_dec_loop (): /GstPipeline:pipeline0/GstDecodeBin:decodebin0/GstOMXH264Dec-omxh264dec:omxh264dec-omxh264dec0:\nstream stopped, reason not-negotiated'

以root身份输出：

GST_DEBUG = 3 sudo python3.2 test.py

** (test.py:3205): WARNING **: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files
prepare-window-handle

因此Gstreamer没有错误，当流开始时窗口就会关闭。

Answer 1

我没有将gtk用于此目的只有wxpython所以只是一些想法尝试更改：

self.bus.connect('message::error', self.on_error)

到

self.bus.connect('message', self.on_error)

然后从那里的信息中挑出骨头，即

t = message.type
if t == Gst.MessageType.ERROR:
    error_0 = Gst.Message.parse_error (message)[0]
    error_1 = Gst.Message.parse_error (message)[1]
    report errors here.......
elif t == Gst.MessageType.EOS:
    print ("End of Audio")
return True

从on_error和on_sync_message始终return True
最后，
尝试在窗口而不是绘图区域触发set_window_handle。

gstreamer视频进入python窗口

1 个答案: