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• how to write subcommand to FFPLAY during playback using subprocess module ?

  4 mars 2023, par ChienMouille

  I'm trying to pause a video playback started with FFPLAY through a python subprocess. You can do this manually by pressing the "p" key on the keyboard while the video is playing. I'd like to emulate this behavior through a python call.

  


  I'm now sending a "p" string, encoded as bytes, through the stdin of the Popen call. The video starts and I can pause it with the keyboard but the communicate command doesn't seem to do anything.

  


  import subprocess
import time

proc = subprocess.Popen(['ffplay', 'PATH_TO_'],
                        stdin=subprocess.PIPE,
                        stdout=subprocess.PIPE,
                        )
time.sleep(2) # just waiting to make sure playback has started
proc.communicate(input="p".encode())[0]



  


  Thanks in advance !

  


• TypeError at /api/v1/file/86370b91-8e25-4833-bbc6-a4b833363893/ 'module' object is not callable

  16 avril 2023, par Olyx

  Please help me, I'm writing a patch request that should change the video resolution, but I can't get the file back from celery
views.py

  


  def patch(self, request, id = None):
    file = File.objects.get(id = id)
    width =  request.data.get('width')
    height = request.data.get('height')
    file.width = width
    file.height = height 
   
    file.video = change_video_extension.delay(file.video.path, width, height).get()
    file.save()
    return Response({'width':width, 'height':height})


  


  tasks.py

  


  import os
from demo.celery import app

@app.task(name = "change_video_extension")
def change_video_extension(input_file, width, height):
    output_file = "abc123.mp4"
    os.system(f"ffmpeg -i {input_file} -s {width}x{height} {output_file}")
    return output_file


  


  TypeError

  


  TypeError at /api/v1/file/86370b91-8e25-4833-bbc6-a4b833363893/
'module' object is not callable
Request Method : PATCH
Request URL : http://127.0.0.1:8000/api/v1/file/86370b91-8e25-4833-bbc6-a4b833363893/
Django Version : 4.2
Exception Type : TypeError
Exception Value :
  
'module' object is not callable

  


• AttributeError : module 'ffmpeg' has no attribute 'load'

  23 avril 2023, par az-purplepen

  I'm having difficulty with ffmpeg. I've installed it properly (I think) but still get AttributeErrors.

  


  I used the online guide (https://ffmpeg.org/download.html), and doing pip install ffmpeg-python instead of pip install ffmpeg. I've verified the installation with pip show. I've also made sure to not name my files ffmpeg.py.

  


  However, when I try running the following commands in terminal, I get an Attribute Error. Any tips ? I've seen this question pop up before, but none of the tips have worked.

  


  >>> import ffmpeg&#xA;>>> ffmpeg.load(&#x27;cover.wav&#x27;)&#xA;Traceback (most recent call last):&#xA;  File "<stdin>", line 1, in <module>&#xA;AttributeError: module &#x27;ffmpeg&#x27; has no attribute &#x27;load&#xA;</module></stdin>