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• Error method describe failed : 401 unauthorized

  5 juillet 2023, par EYakoumi

  I am trying to connect to an RTSP camera using opencv c++ but for this specific camera i am getting the following message whenever i try to connect

  


  Error method describe failed : 401 unauthorized

  


  the code i used to connect is as follows :

  


  VideoCapture camera;&#xA;&#xA;camera.open("rtsp://ssdadmin:S5D.admin@<ip>:<port>/live/221067c3-fa55-4c44-819d-47b54497cfc9", CAP_FFMPEG);&#xA;</port></ip>

  


  where the username is ssdadmin and the password is S5D.admin
and used the correct values for ip and port

  


  I read here that opencv might need url encoding for the password special characters so i switched the "." character in the password to %2E (S5D%2Eadmin) again same problem. knowing that accessing the same url in vlc without encoding the character works.

  


  what am i missing in the address to get the unauthorized message

  


• How to make watermark move till the video ends in FFMPEG

  27 décembre 2022, par Мохамед Русланович

  am using this command to move watermark around my video. It's working but it only move once around the edges and then desapers

  


  ffmpeg -i film.mp4 -i logo_white.png -filter_complex "[0][1]overlay=x='0+(t-0)*(W-w)/5':y=0:enable='between(t,0,5)'[img];[img][1]overlay=x=W-w:y='0+(t-5)*(H-h)/5':enable='between(t,5,10)'[img];[img][1]overlay=x=(W-w)-(t-10)*(W-w)/5:y=H-h:enable='between(t,10,15)'[img],[img][1]overlay=x=0:y=(H-h)-(t-15)*(H-h)/5:enable='between(t,15,20)'"  output2.mp4


  


  I also tried this command using the -loop tag

  


  ffmpeg -t 20 -loop 1 -i film.mp4 -i logo_white.png  -loop 0  -filter_complex "[0][1]overlay=x='0+(t-0)*(W-w)/5':y=0:enable='between(t,0,5)'[img];[img][1]overlay=x=W-w:y='0+(t-5)*(H-h)/5':enable='between(t,5,10)'[img];[img][1]overlay=x=(W-w)-(t-10)*(W-w)/5:y=H-h:enable='between(t,10,15)'[img],[img][1]overlay=x=0:y=(H-h)-(t-15)*(H-h)/5:enable='between(t,15,20)'" output2.mp4


  


  But it throws an error (option loop not found)

  


  How to repeat the overlay over and over till the video ends ?

  


• ffmpeg - invalid duration

  22 septembre 2016, par OmidAntiLong

  For a project I’m working on I have a small bash script that loops over an input csv file of timecodes, and uses ffmpeg to create screenshots of a given film at each timecode. The csv file is in the format hh:mm:ss,id - it looks like this (extract)

  00:00:08,1
  
  00:00:49,2
  
  00:01:30,3
  
  00:02:38,4
  
  00:03:46,5
  
  00:04:08,6
  
  00:04:26,7
  
  00:04:37,8
  
  00:04:49,9
  
  00:05:29,10
  
  00:05:52,11
  
  00:06:00,12
  
  00:06:44,13
  
  00:07:49,14
  
  00:08:32,15
  
  00:09:28,16
  
  00:10:17,17
  
  00:10:44,18
  
  00:11:48,19
  
  00:12:07,20

  I’ve used it without issue in the past, but today I’ve come to update some of the films and I’m getting a weird issue where ffmpeg is complaining that my input timecode is invalid, despite being in the right format.

  The new input csv files are the same format as the old ones, but it seems like every so often ffmpeg drops the hours from the hh:mm:ss timestamp. If I comment out the ffmpeg line, everything prints to the terminal as expected (but obviously I get no screenshots).

  This is my loop code :

  while read code a
  
  do
  
    echo $code
  
    f="$(printf "%03d" $i)"
  
  
  
    ffmpeg -loglevel error -y -ss $code -i $FILM -vframes 1 -q:v 2 $OUTPUT/$f.jpg
  
  
  
    ((i++))
  
  done < $INPUT

  I’ve tried all sorts, including padding the csv with extra 0s - which works until the hours tick over to 01.

  

  Does anyone have any ideas ? I’m scratching my head.

  Cheers