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Sur d’autres sites (4893)

  • Pipe PyQt Widget Images to ffmpeg

    31 octobre 2014, par throwaway17434

    I have a PyQt Window with widgets that change. I want to make a video of it. I found this Answere to be very useful, however it is does not seem to be possible to use subprocess PIPE as a target in QtGui.QPixmap’s save-method. I have the feeling that I should use the native QtProcess for this kind of work, but I don’t know how I can PIPE the images and I can’t see the errors because I can’t see the standard outpur/error either. What I want to do is something like this :

    from PyQt4 import QtGui, QtCore
    
import random
    

    
app = QtGui.QApplication([])
    
win    = QtGui.QWidget()
    
layout = QtGui.QGridLayout()
    
win.setLayout(layout)
    

    
#picture frame
    
scene = QtGui.QGraphicsScene()
    
canvas  = QtGui.QGraphicsView(scene)
    
layout.addWidget(canvas,0,0)
    

    
# start button
    
def run():
    
    # set pen
    
    pen = QtGui.QPen(QtCore.Qt.red)
    
    size = canvas.size()
    

    
    # start seperate process
    
    process = QtCore.QProcess(app)
    
    process.start('ffmpeg',['-y', '-f', 'image2pipe', '-vcodec', 'mjpeg', '-r', '24',  '-i', '-', '-vcodec', 'mpeg4', '-qscale', '5', 'video.avi'])
    
    for i in range(100):
    
        x = random.randint(1, size.width()-1)
    
        y = random.randint(1, size.height()-1)        
    
        scene.addLine(x,y,x,y, pen=pen)
    
        QtGui.QPixmap.grabWidget(win).save(process, "jpeg")
    

    
but_run = QtGui.QPushButton("Go!")
    
but_run.clicked.connect(run)
    
layout.addWidget(but_run,1,0)
    

    
win.show()
    
app.exec_()

  • Pipe PyQt Widget Images to ffmpeg

    10 février 2024, par throwaway17434

    I have a PyQt Window with widgets that change. I want to make a video of it. I found this Answer to be very useful, however it is does not seem to be possible to use subprocess PIPE as a target in QtGui.QPixmap's save-method. I have the feeling that I should use the native QtProcess for this kind of work, but I don't know how I can PIPE the images and I can't see the errors because I can't see the standard outpur/error either. What I want to do is something like this :

    


    from PyQt4 import QtGui, QtCore
import random

app = QtGui.QApplication([])
win    = QtGui.QWidget()
layout = QtGui.QGridLayout()
win.setLayout(layout)

#picture frame
scene = QtGui.QGraphicsScene()
canvas  = QtGui.QGraphicsView(scene)
layout.addWidget(canvas,0,0)

# start button
def run():
    # set pen
    pen = QtGui.QPen(QtCore.Qt.red)
    size = canvas.size()
    
    # start seperate process
    process = QtCore.QProcess(app)
    process.start('ffmpeg',['-y', '-f', 'image2pipe', '-vcodec', 'mjpeg', '-r', '24',  '-i', '-', '-vcodec', 'mpeg4', '-qscale', '5', 'video.avi'])
    for i in range(100):
        x = random.randint(1, size.width()-1)
        y = random.randint(1, size.height()-1)        
        scene.addLine(x,y,x,y, pen=pen)
        QtGui.QPixmap.grabWidget(win).save(process, "jpeg")
        
but_run = QtGui.QPushButton("Go!")
but_run.clicked.connect(run)
layout.addWidget(but_run,1,0)

win.show()
app.exec_()


    


  • ffmpeg pipe response how to play javascript ?

    30 mars 2017, par 최진영

    Hello i have some question

    i trying app.post and response angular2

    here is my code

    function.js

     var url = 'https://www.youtube.com/watch?v=' + id;
    
 try {
    
       youtubeStream(url).pipe(res)
    
     } catch (exception) {
    
        res.status(500).send(exception)
    
      }

    response.ts

           this.loading = true 
    
        var headers = new Headers(); 
    
        var query = {
    
                     "videoURL" : this.tracklist[0].videoURL
    
                    }
    
         headers.append('Content-Type', 'application/json');
    
         this.http.post('http://localhost:4100/toMp3',query,{headers: headers}).subscribe((res) => {
    
             console.log(res) <-- plz check picture
    
         });

    console.log(res)

    console.log(res)

    I do not know how to play stream data in _body

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