我有一个代码，当前可拍摄一个视频，并使用Python的gstreamer绑定在屏幕上显示它。在打开播放器时单击“转发”按钮时，我可以搜索视频，这对我来说是一个重要功能，因此，我不想使用解析来编写管道并将其发送到gst-launch的原因
我现在要做的是不仅将视频流式传输到新打开的窗口，而且还通过RTSP（或仅当我不能同时使用时）流式传输该视频，以便在VLC或局域网上的另一个客户端上打开它。有什么办法吗？
很抱歉，代码很长，但是这里是：
import sys, os, time
import gi
gi.require_version('Gst', '1.0')
from gi.repository import Gst, GObject, Gtk
from gi.repository import GdkX11, GstVideo
class GTK_Main(object):
def __init__(self):
window = Gtk.Window(Gtk.WindowType.TOPLEVEL)
window.set_title("Vorbis-Player")
window.set_default_size(500, -1)
window.connect("destroy", Gtk.main_quit, "WM destroy")
vbox = Gtk.VBox()
window.add(vbox)
self.entry = Gtk.Entry()
vbox.pack_start(self.entry, False, False, 0)
hbox = Gtk.HBox()
vbox.add(hbox)
buttonbox = Gtk.HButtonBox()
hbox.pack_start(buttonbox, False, False, 0)
rewind_button = Gtk.Button("Rewind")
rewind_button.connect("clicked", self.rewind_callback)
buttonbox.add(rewind_button)
self.button = Gtk.Button("Start")
self.button.connect("clicked", self.start_stop)
buttonbox.add(self.button)
forward_button = Gtk.Button("Forward")
forward_button.connect("clicked", self.forward_callback)
buttonbox.add(forward_button)
self.time_label = Gtk.Label()
self.time_label.set_text("00:00 / 00:00")
hbox.add(self.time_label)
window.show_all()
self.player = Gst.ElementFactory.make("playbin", "player")
bus = self.player.get_bus()
bus.add_signal_watch()
bus.enable_sync_message_emission()
bus.connect("message", self.on_message)
bus.connect("sync-message::element", self.on_sync_message)
def start_stop(self, w):
if self.button.get_label() == "Start":
filepath = self.entry.get_text().strip()
if os.path.isfile(filepath):
filepath = os.path.realpath(filepath)
self.butto
n.set_label("Stop")
self.player.set_property("uri", "file://" + filepath)
self.player.set_state(Gst.State.PLAYING)
time.sleep(1)
self.forward_callback(60)
else:
self.player.set_state(Gst.State.NULL)
self.button.set_label("Start")
def on_message(self, bus, message):
t = message.type
if t == Gst.MessageType.EOS:
self.player.set_state(Gst.State.NULL)
self.button.set_label("Start")
elif t == Gst.MessageType.ERROR:
self.player.set_state(Gst.State.NULL)
err, debug = message.parse_error()
print ("Error: %s" % err, debug)
self.button.set_label("Start")
def on_sync_message(self, bus, message):
if message.get_structure().get_name() == 'prepare-window-handle':
imagesink = message.src
imagesink.set_property("force-aspect-ratio", True)
imagesink.set_window_handle(self.movie_window.get_property('window').get_xid())
def rewind_callback(self, w):
rc, pos_int = self.player.query_position(Gst.Format.TIME)
seek_ns = pos_int - 10 * 1000000000
if seek_ns < 0:
seek_ns = 0
print ("Backward: %d ns -> %d ns" % (pos_int, seek_ns))
self.player.seek_simple(Gst.Format.TIME, Gst.SeekFlags.FLUSH, seek_ns)
def forward_callback(self, w):
rc, pos_int = self.player.query_position(Gst.Format.TIME)
if type(w) == int:
seek_ns = w * 1000000000
else:
seek_ns = pos_int + 10 * 1000000000
print ("Forward: %d ns -> %d ns" % (pos_int, seek_ns))
self.player.seek_simple(Gst.Format.TIME, Gst.SeekFlags.FLUSH, seek_ns)
def convert_ns(self, t):
# This method was submitted by Sam Mason.
# It's much shorter than the original one.
s,ns = divmod(t, 1000000000)
m,s = divmod(s, 60)
if m < 60:
return "%02i:%02i" %(m,s)
else:
h,m = divmod(m, 60)
return "%i:%02i:%02i" %(h,m,s)
GObject.threads_init()
Gst.init(None)
GTK_Main()
Gtk.main()
我在this教程中找到了此代码。
答案 0 :(得分：2)
因此，我最终设法使提供的链接有效。我的问题是视频的宽度和高度，必须与要播放的视频具有完全相同的值，也许与传递的opencv帧有关……还有“ is-live”属性，该属性设置为由于必须使用链接解决方案中的网络摄像头，因此为true（必须将其设置为false）（或因为默认值而根本不使用），否则视频将在黑屏中出现一定的延迟。该代码最终是：
(function(){
var uStatePaths=[
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.......
];
const uStates={};
const width = 960,
height = 600;
const projection = d3.geoAlbersUsa()
.scale(700)
.translate([width / 2, height / 2]);
const path = d3.geoPath()
.projection(projection);
const svg = d3.select("body").append("svg")
.attr("width", width)
.attr("height", height);
uStates.draw = function(id, data, toolTip){
function mouseOver(d){
d3.select("#tooltip").transition().duration(200).style("opacity", .9);
d3.select("#tooltip").html(toolTip(d.n, data[d.id]))
.style("left", (d3.event.pageX) + "px")
.style("top", (d3.event.pageY - 28) + "px");
}
function mouseOut(){
d3.select("#tooltip").transition().duration(500).style("opacity", 0);
}
svg.selectAll(".state")
.data(uStatePaths).enter().append("path").attr("class","state").attr("d",function(d){ return d.d;})
.style("fill",function(d){ return data[d.id].color; })
.attr("id", function(d){
return d.id;
})
.on("mouseover", mouseOver).on("mouseout", mouseOut);
svg.selectAll(".stateText")
.data(uStatePaths)
.enter().append("text")
.attr("x", function(d) {
return path.centroid(d.d)[0];
})
.attr("y", function(d) {
console.log(d, d.d)
return path.centroid(d.d)[1];
})
.attr("text-anchor", "middle")
.attr("font-size", "12px")
.text("foo")
};
this.uStates=uStates;
this.asd = uStatePaths;
})();