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Description
Hi @cainmagi
When I try to extract last 2 frames of a video it return None
Here is the code used :
from PySide2.QtWidgets import QWidget, QLabel, QVBoxLayout, QApplication, QSlider
from PySide2.QtGui import QImage, QPixmap
from PySide2.QtCore import Qt
import mpegCoder
mpegCoder.setGlobal(dumpLevel=0)
class Player(QWidget):
def __init__(self, parent=None):
super(Player, self).__init__(parent)
self._layout = QVBoxLayout(self)
self.image = QLabel()
self.slider = QSlider(Qt.Horizontal)
self.slider.valueChanged.connect(self.extract_frame)
self._layout.addWidget(self.image)
self._layout.addWidget(self.slider)
self.frames = []
self.open_file()
def close(self):
self.decoder.clear()
return super(Player, self).close()
def open_file(self):
self.decoder = mpegCoder.MpegDecoder()
self.decoder.setParameter(nthread=4)
opened = self.decoder.FFmpegSetup(r"30.mp4")
if opened:
duration = self.decoder.getParameter("duration")
fps = self.decoder.getParameter("avgFrameRate")
frameCount = duration*fps
print("Video frame count is", frameCount)
self.slider.setRange(0, frameCount-1) # -1 since start from 0
self.extract_frame(0)
def extract_frame(self, frame):
print(frame)
p = self.decoder.ExtractFrame(frame, 1)
data = p[0].data
height = p[0].shape[0]
width = p[0].shape[1]
channel = p[0].shape[2]
pixmap = QPixmap.fromImage(QImage(data, width, height, channel*width, QImage.Format_RGB888))
self.image.setPixmap(pixmap)
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
p = Player()
p.show()
app.exec_()
You can change the frame by changing the slider
Here is the video used, 10sec/300frame video @30fps
the time code should be from 00:00 to 09:29
beeping every 1 sec/ 30 frame
30.mp4
Not really sure if this is a bug or if I'm doing something wrong
To Reproduce
- Run the code
- Change the slider
- Error occur when extracting last 2 frame
Traceback
No response
Behaviors
- The expected behaviors: able to extract every frame of the video
- The actual behaviors: unable to extract last 2 frame of the video
Screenshots
No response
OS
Windows 10
Python version
3.9
numpy version
1.23.1
mpegCoder version
3.2.4
Additional context
No response