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• OpenCV : FFMPEG : tag 0x00000021/' !???' is not found (format 'mp4 / MP4 (MPEG-4 Part 14)')'

  10 juin 2020, par Hepo8421

  I got error when trying to run a python script. Iam trying to make a project based on pyimagesearch tutorial.

  



  Code :
In first script :

  



  filename = tempVideo.path[tempVideo.path.rfind("/") + 1:]
    s3.upload_file(tempVideo.path, self.conf["s3_bucket"],
        filename, ExtraArgs={"ACL": "public-read",
        "ContentType": "video/mp4"})


  



  In main script :

  



  tempVideo = TempFile(ext=".mp4")
    writer = cv2.VideoWriter(tempVideo.path, 0x21, 30, (W, H),
        True)


  



  Error I recieved :

  



  OpenCV: FFMPEG: tag 0x00000021/'!???' is not found (format 'mp4 / MP4 (MPEG-4 Part 14)')'
Exception in thread Thread-4:
Traceback (most recent call last):
  File "/usr/lib/python3.7/threading.py", line 917, in _bootstrap_inner
    self.run()
  File "/usr/lib/python3.7/threading.py", line 865, in run
    self._target(*self._args, **self._kwargs)
  File "/home/pi/Desktop/pi-security-camera/pyimagesearch/notifications/twilionotifier.py", line 27, in _send
    "ContentType": "video/mp4"})
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/boto3/s3/inject.py", line 131, in upload_file
    extra_args=ExtraArgs, callback=Callback)
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/boto3/s3/transfer.py", line 279, in upload_file
    future.result()
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/futures.py", line 106, in result
    return self._coordinator.result()
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/futures.py", line 265, in result
    raise self._exception
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/tasks.py", line 255, in _main
    self._submit(transfer_future=transfer_future, **kwargs)
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/upload.py", line 549, in _submit
    upload_input_manager.provide_transfer_size(transfer_future)
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/upload.py", line 237, in provide_transfer_size
    transfer_future.meta.call_args.fileobj))
  File "/home/pi/.virtualenvs/cv/lib/python3.7/site-packages/s3transfer/utils.py", line 245, in get_file_size
    return os.path.getsize(filename)
  File "/usr/lib/python3.7/genericpath.py", line 50, in getsize
    return os.stat(filename).st_size
FileNotFoundError: [Errno 2] No such file or directory: './/13675f07-ecec-48ae-97bf-32109eb3ed7d.mp4'


  



  Thanks for advices :)

  


• Ruby on Rails 4 Heroku App Crash while uploading large size video

  22 juillet 2016, par Krishna Vyas

  large video file isn’t uploading on heroku and throwing Application Crash error
  Here is my Model Code :

  has_attached_file :video, :styles => {
  
    :medium => {
  
      :geometry => "640x480",
  
      :format => 'mp4',
  
      :convert_options => {
  
      :output => {
  
        :vcodec => 'libx264',
  
        :acodec => 'copy'
  
      }
  
    }
  
    },
  
    :thumb => {
  
      :geometry => "300x300#",
  
      :format => 'jpg',
  
      :time => 2,
  
      :auto_rotate => true
  
    }
  
  }, :processors => [:transcoder]
  
  
  
  validates_attachment_content_type :video, content_type: /\Avideo\/.*\Z/

  Here is my log from heroku

  2016-07-22T13:15:13.616340+00:00 app[web.1]: Command :: file -b --mime '/tmp/33028ec79c8028f75908c90d9f018aeb20160722-3-1e90wvf.mp4'
  
  2016-07-22T13:15:13.771935+00:00 app[web.1]: [AV] Running command: if command -v avprobe 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2016-07-22T13:15:13.773078+00:00 app[web.1]: [AV] Running command: if command -v ffmpeg 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2016-07-22T13:15:13.774121+00:00 app[web.1]: [AV] Found ["ffmpeg"], using: Ffmpeg
  
  2016-07-22T13:15:13.774159+00:00 app[web.1]: [AV] Running command: if command -v avprobe 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2016-07-22T13:15:13.775225+00:00 app[web.1]: [AV] Running command: if command -v ffmpeg 2>/dev/null; then echo "true"; else echo "false"; fi
  
  2016-07-22T13:15:13.776771+00:00 app[web.1]: [AV] Found ["ffmpeg"], using: Ffmpeg
  
  2016-07-22T13:15:13.776807+00:00 app[web.1]: [AV] Running command: ffmpeg -i "/tmp/33028ec79c8028f75908c90d9f018aeb20160722-3-xbemwt.mp4" 2>&1
  
  2016-07-22T13:15:13.814982+00:00 app[web.1]: [paperclip] [transcoder] Transocding supported file /tmp/33028ec79c8028f75908c90d9f018aeb20160722-3-xbemwt.mp4
  
  2016-07-22T13:15:13.815056+00:00 app[web.1]: [AV] Adding output parameter ["acodec", "aac"]
  
  2016-07-22T13:15:13.815103+00:00 app[web.1]: [AV] Adding output parameter ["strict", "experimental"]
  
  2016-07-22T13:15:13.815289+00:00 app[web.1]: [AV] Adding output parameter [:s, "640x480"]
  
  2016-07-22T13:15:13.815379+00:00 app[web.1]: [AV] Running command: ffmpeg -i "/tmp/33028ec79c8028f75908c90d9f018aeb20160722-3-xbemwt.mp4" -acodec aac -strict experimental -s 640x480 -y "/tmp/33028ec79c8028f75908c90d9f018aeb20160722-3-xbemwt20160722-3-1pwdg2k.mp4"
  
  2016-07-22T13:15:43.237749+00:00 heroku[router]: at=error code=H12 desc="Request timeout" method=POST path="/courses/5/sections/7/lessons/11" host=xxxxx.herokuapp.com request_id=a1408ac7-c7c3-40f4-8365-86156d2d2314 fwd="43.255.56.1" dyno=web.1 connect=0ms service=188655ms status=503 bytes=0

• Hls media playlist request url override

  16 janvier 2018, par Tomasz Kowalczyk

  Trying to implement hls support on my platform build with laravel. Testing both ffmpeg and AWS Elastic transcoder solutions. The problem is that i’ve got custom url for requesting files for security purposes. That url then returns the hls master playlist, but subsequent request for media playlists has wrong url. This is because the paths in master playlist are not absolute. I tested it with absolute paths and it worked, but I changed the paths manually, can’t see it as an option on AWS Elastic Trancoder, and not tested it yet on ffmpeg package. I’m not really sure what generates the subsequent request for the media playlists ? Is it the video player or hls codec/plugin ? Can i tinker the original response headers to modify the subsequent requests ? Or am I going the wrong way about it ?
  Any help would be greatly appreciated.