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• How to transcode .mp4 files using ffmpeg celery rabbitMq in Amazon Linux ?

  11 mars 2017, par Srinivas 25

  I want to transcode .mp4, .flv files by using ffmpeg, celery and rabbitMQ. With the help of these tools i can able to transcode in localhost, where in
  my OS is ubuntu, but i am unable to do the same on AWS Linux for production
  Here is the code i am using to integrate ffmpeg, rabbitMQ and celery to transcode on Amazon Linux

  FFMPEG_PATH = '/usr/bin/ffmpeg'
  
  
  
  
  
  CELERY_BROKER_URL = 'amqp://guest:guest@awsuser:5672//'
  
  CELERY_ACCEPT_CONTENT = 'file'
  
  CELERY_RESULT_BACKEND = 'rpc://'
  
  CELERY_TASK_SERIALIZER = 'file'

  celery.py

  from __future__ import absolute_import
  
  import os
  
  from celery import Celery
  
  from afnity.settings import CELERY_BROKER_URL
  
  
  
  os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'afnity.settings')
  
  
  
  
  
  app = Celery('taskapp',
  
           broker=CELERY_BROKER_URL,
  
           include=['taskapp.tasks'])
  
  
  
  app.config_from_object('django.conf:settings', namespace='CELERY')
  
  
  
  
  
  if __name__ == '__main__':
  
  app.start()

  tasks.py

  from .celery import app
  
  
  
  @app.task
  
  def add()
  
   return(3+4d)

• Watch multi-stream video file while being recorded by ffmpeg

  20 janvier 2020, par Luke Gorrie

  I am using ffmpeg to record four 1080p video streams simultaneously and I would like to view these streams in real time while they are being recorded. Ideally I would like to view them from a separate machine, using some convenient Linux data sharing method like ssh/sshfs/..., but that is a nice-to-have. Is there a practical way to accomplish this ?

  The ffmpeg recording command that I currently use is like this :

  ffmpeg \
  
    -f v4l2 -i $cam0 \
  
    -f v4l2 -i $cam1 \
  
    -f v4l2 -i $cam2 \
  
    -f v4l2 -i $cam3 \
  
    -f matroska \
  
    -map 0 \
  
    -map 1 \
  
    -map 2 \
  
    -map 3 \
  
    -c copy \
  
    $output.mkv

  My problem would be solved if I could use a command like ffplay or vlc to play one or more of the video streams, always tracking close to the end of the stream, playing more as data becomes available. I haven’t found such an option though.

  One alternative might be to have the recording ffmpeg process also tile the four 1080p videos into one 4K grid and pipe that to ffplay. Then I could at least preview on the same machine that is recording. I have not been able to work out the right ffmpeg command to do the tiling though and would appreciate an example.

• Revision 16040 : Des couleurs pastels en plus puisqu’on est plus limite en nombre. ...

  7 septembre 2010, par cedric@… — Log

  Des couleurs pastels en plus puisqu’on est plus limite en nombre. Faudrait-il prevoir une chaine de langue et un nom pour chaque ?