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Sur d’autres sites (9284)

  • 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)
  • Opening Video with opencv3 and python on Amazon EC2

    11 octobre 2016, par stml

    I successfully set up python and opencv3 on an t2.micro instance by following these instructions : http://stackoverflow.com/a/38867965/1213715

    The script which worked on my local machine no longer works. The problem seems to be with importing video. The start of my code now looks like this :

    import numpy as np
    import cv2

    cap = cv2.VideoCapture('/home/ec2-user/test.mov')

    if(cap.isOpened() == False):
       print "Can't open video"
       exit()

    This exits every time. I have tried different paths and different video formats (including .avi).

    In other threads, I read that ffmpeg is essential to cv2 video functions, and successfully installed this using the instructions at https://forums.aws.amazon.com/thread.jspa?messageID=524523. I can now run ffmpeg from the command line - but it has not changed the cv2 output.

    Do I need to link ffmpeg to cv2 somehow, or do I need to recompile entirely - and if so, what change should I make to the original installation instructions ?

    Python version 2.7.12

    Opencv version 3.1.0

  • Install gstreamer on EC2 Amazon Linux AMI ?

    6 décembre 2015, par vy32

    I’m trying to install QT5.5 on Amazon EC2 Linux, which apparently requires that I install some kind of multimedia support. It looks like that comes from gstreamer.

    yum search gstreamer turns up :

    [ec2-user@ip-172-30-1-58 ~]$ yum search gstreamer
    Loaded plugins: priorities, update-motd, upgrade-helper
    23 packages excluded due to repository priority protections
    ============================================== N/S matched: gstreamer ==============================================
    gstreamer-ffmpeg.x86_64 : GStreamer FFmpeg-based plug-ins
    gstreamer-ffmpeg-debuginfo.x86_64 : Debug information for package gstreamer-ffmpeg
    gstreamer-plugins-bad.x86_64 : GStreamer streaming media framework "bad" plug-ins
    gstreamer-plugins-bad-debuginfo.x86_64 : Debug information for package gstreamer-plugins-bad
    gstreamer-plugins-bad-nonfree.x86_64 : Non Free GStreamer streaming media framework "bad" plug-ins
    gstreamer-plugins-bad-nonfree-debuginfo.x86_64 : Debug information for package gstreamer-plugins-bad-nonfree
    gstreamer-plugins-ugly.x86_64 : GStreamer streaming media framework "ugly" plug-ins
    gstreamer-plugins-ugly-debuginfo.x86_64 : Debug information for package gstreamer-plugins-ugly
    gstreamer-plugins-ugly-devel-docs.noarch : Development documentation for the GStreamer "ugly" plug-ins
    gstreamer1-libav.x86_64 : GStreamer 1.0 libav-based plug-ins
    gstreamer1-libav-debuginfo.x86_64 : Debug information for package gstreamer1-libav
    gstreamer1-plugins-bad-freeworld.x86_64 : GStreamer 1.0 streaming media framework "bad" plug-ins
    gstreamer1-plugins-bad-freeworld-debuginfo.x86_64 : Debug information for package gstreamer1-plugins-bad-freeworld
    gstreamer1-plugins-ugly.x86_64 : GStreamer 1.0 streaming media framework "ugly" plug-ins
    gstreamer1-plugins-ugly-debuginfo.x86_64 : Debug information for package gstreamer1-plugins-ugly
    gstreamer1-plugins-ugly-devel-docs.noarch : Development documentation for the GStreamer "ugly" plug-ins
    gstreamer1-vaapi.x86_64 : GStreamer plugins to use VA API video acceleration
    gstreamer1-vaapi-debuginfo.x86_64 : Debug information for package gstreamer1-vaapi
    gstreamer1-vaapi-devel.x86_64 : Development files for gstreamer1-vaapi
    qt-gstreamer.x86_64 : C++ bindings for GStreamer with a Qt-style API
    qt-gstreamer-debuginfo.x86_64 : Debug information for package qt-gstreamer
    qt-gstreamer-devel.x86_64 : Header files and development documentation for qt-gstreamer

     Name and summary matches only, use "search all" for everything.
    [ec2-user@ip-172-30-1-58 ~]$ %

    However, when I try to install one of these, I get this error :

    $ sudo yum install -y gstreamer-ffmpeg
    Loaded plugins: priorities, update-motd, upgrade-helper
    23 packages excluded due to repository priority protections
    Resolving Dependencies
    --> Running transaction check
    ---> Package gstreamer-ffmpeg.x86_64 0:0.10.13-15.el7.nux will be installed
    --> Processing Dependency: liborc-0.4.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstvideo-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstreamer-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstpbutils-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstbase-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstaudio-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Finished Dependency Resolution
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: liborc-0.4.so.0()(64bit)
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: libgstreamer-0.10.so.0()(64bit)
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: libgstbase-0.10.so.0()(64bit)
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: libgstaudio-0.10.so.0()(64bit)
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: libgstpbutils-0.10.so.0()(64bit)
    Error: Package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 (nux-dextop)
              Requires: libgstvideo-0.10.so.0()(64bit)
    You could try using --skip-broken to work around the problem
    You could try running: rpm -Va --nofiles --nodigest
    [ec2-user@ip-172-30-1-58 ~]$

    Supplying the suggested --skip-broken doesn’t help :

    [ec2-user@ip-172-30-1-58 ~]$ sudo yum install -y gstreamer-ffmpeg --skip-broken
    Loaded plugins: priorities, update-motd, upgrade-helper
    23 packages excluded due to repository priority protections
    Resolving Dependencies
    --> Running transaction check
    ---> Package gstreamer-ffmpeg.x86_64 0:0.10.13-15.el7.nux will be installed
    --> Processing Dependency: liborc-0.4.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstvideo-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstreamer-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstpbutils-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstbase-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64
    --> Processing Dependency: libgstaudio-0.10.so.0()(64bit) for package: gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64

    Packages skipped because of dependency problems:
       gstreamer-ffmpeg-0.10.13-15.el7.nux.x86_64 from nux-dextop
    [ec2-user@ip-172-30-1-58 ~]$

    So how do I install gstreamer-ffmpeg ? Why aren’t the dependencies automatically being followed ?