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• FFMpegm. Unable to get video stream from a onvif camera

  15 avril 2018, par Denis Gottardello

  I have implemented ffmpeg in my own application to watch live video from video cameras.
  I have tested my application with 2 models of onvif camera and the application works perfectly.
  The customer has got another model of video cameram still onvif h264 but I can’t watch the live stream.
  I can wath it using vlc but when I try to watch it with my application I obtain the following error :

  Input #0, rtsp, from 'rtsp://admin:admin@172.30.153.33:554/1':
  
    Metadata:
  
      title           : h264.mp4
  
    Duration: N/A, bitrate: 64 kb/s
  
      Stream #0:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
  
      Stream #0:1: Audio: pcm_mulaw, 8000 Hz, 1 channels, s16, 64 kb/s
  
  [rtsp @ 0x7f86b8004e00] UDP timeout, retrying with TCP
  
  [rtsp @ 0x7f86b8004e00] method PAUSE failed: 455 Method Not Valid In This State
  
  [rtsp @ 0x7f86b8005000] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options

  I have already tried to modify analyzeduration and probesize without any good result.

  How to resolve this error ?
  Could it be caused by a not up-to-date h264 library ?

• Trouble trimming video by frame number with ffmpeg

  8 décembre 2023, par jgore200377

  I want to trim/split a video with ffmpeg using frames. The reason why is because I am using a Shot Transition Detection model which returns a probability of transition for every frame in the video.

  


  Using timestamps to cut the video has yielded bad results as the precision is not 100%.

  


  Ive tried this command which just outputs the entire video which is DEFINITELY not what I want

  


  ffmpeg -i video.mp4 -vf "trim=start_frame=100:end_frame=200,setpts=PTS-STARTPTS" -c:a copy output.mp4


  


  Ive also tried using python bindings with ffmpeg-python

  


  import ffmpeg

input_file = ffmpeg.input('video.mp4')
output_file = ffmpeg.output(input_file.trim(start_frame=1300, end_frame=1500), 'test_output.mp4')
ffmpeg.run(output_file)


  


  This doesnt work either and outputs a video with half of it being still with unpredictable length

  


  ---

  


  Ive visited some other sites but none seem to have this nailed down and it would be much appreciated if someone can answer how to use frames to trim/split a video with ffmpeg.

  


• Cocaine::CommandNotFoundError

  6 décembre 2018, par Haseeb Ahmad

  Using paperclip-ffmpeg for video uploading.

  When I upload it gives an error

  Cocaine::CommandNotFoundError (Cocaine::CommandNotFoundError):
  
  app/controllers/ads_controller.rb:27:in `create
  
  
  
  Cannot render console with content type multipart/form-dataAllowed content types: [#, #, #]

  My model is

  has_attached_file :videod, :styles => { 
  
    :medium => { :geometry => "640x480", :format => 'flv' },
  
    :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
  
  }, :processors => [:ffmpeg]
  
  validates_attachment_size :videod, :less_than => 100.megabytes
  
  validates_attachment_presence :videod
  
  validates_attachment_content_type :videod, :content_type => /\Avideo\/.*\Z/

  My Gemfile is

  gem "cocaine"
  
  gem 'paperclip-ffmpeg'