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• 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

  


• FFmpeg : Copy 'location' metadata to output file name

  11 avril 2023, par Kristian

  I have a FFmpeg batch script for downscaling all videos in a directory. The videos have been recorded in different forests, and I would like to write the geolocation as the output file name.

  


  Currenly, my script is

  


  FOR /F "tokens=*" %G IN ('dir /b *.MP4') DO "c:\Program Files\ffmpeg\bin\ffmpeg.exe" -i "%G"  -vf "scale=trunc(iw/10)*2:trunc(ih/10)*2" -vcodec libx265 -crf 20 "%~nG_komprimeret.mp4"


  


  When I look at the file's metadata, I can see the location

  


  Output #0, mp4, to 'GH013764_komprimeret.mp4':
  Metadata:
    major_brand     : mp41
    minor_version   : 538120216
    compatible_brands: mp41
    firmware        : HD7.01.01.90.00
    location        : +56.1710+009.5756/
    location-eng    : +56.1710+009.5756/


  


  My files output should be named something like GH013764_komprimeret_+56.1710+009.5756.mp4.

  


  How is it possible to include the location metadata in the output file name ?

  


• 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 !