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• Evolution #3973 : Brancher inc/distant recuperer_url() sur une librairie récente

  21 février 2019, par Eric Camus

  Bonjour,

  Pour les datas, je pense que qu’il y a une compatibilité entre celles attendus par la fonction ’recuperer_url’ et celles attendue par l’option ’CURLOPT_POSTFIELDS’ :
  - SPIP ’recuperer_url’ : string|array datas : Pour envoyer des donnees (array) et/ou entetes (string) (force la methode POST si donnees non vide)
  - CUrl ’CURLOPT_POSTFIELDS’ : Ce paramètre peut être passé sous la forme d’une chaîne encodée URL, comme ’para1=val1&para2=val2&...’ ou sous la forme d’un tableau dont le nom du champ est la clé, et les données du champ la valeur. Si le paramètre value est un tableau, l’en-tête Content-Type sera définie à multipart/form-data (cf http://php.net/manual/fr/function.curl-setopt.php).
  Je n’ai pas trouver de littérature sur le formatage de data en mode chaine pour ’recuperer_url’ et pas analyser comment les fonctions dans ’recuperer_url’ l’attendait, mais les tableaux doivent être compatibles non ?. Plus besoin de fournir le boundary qui n’est utile que pour les tableaux.

  Pour ce qui est de mettre dans le git SPIP, je vais voir comment ça marche...

• Concatenation and Transcoding of MPEG-TS files FFMPEG

  20 décembre 2020, par SquawkBirdies

  I have a DVR which records over-the-air TV and saves the recordings in the MPEG-TS format, splitting each episode across multiple files, each 500 MB in size.

  



  To simplify archiving, I have been trying to write a shell script to automate the process of concatenating the files together and transcoding them into a more common video format, like h.264.

  



  Here are the steps I have performed so far :

  



  

  • I wanted to make sure that the files I was getting were valid in the first place. To test this, each section was transcoded in Handbrake before being merged using ffmpeg's concat command. This worked, but was manual and added an annoying black frame between each section.

  


  • I wrote a shell script to find all the sections of an episode in a folder and put the file names into a text file that the concat demuxer could parse.

  


  • Tested this command :

  


  



  


  


  ffmpeg -hide_banner -f concat -i video_files_tmp.txt -c:v libx264 -pix_fmt yuv420p -c:a aac $2$OUTPUT_FILE_NAME

  


  


  




  During the transcode, this would throw many warnings and errors, such as "PES packet size mismatch". At some point, it would warn that more than 1,000 frame were skipped. When the output was played, it would skip frames and result in a file where the video froze partway through but the audio continued playing. I tried adding -vsync 0 to the output as well.

  



  

  • Then, tried splitting the concatenation and transcode into two steps :

  


  



  


  


  ffmpeg -hide_banner -f concat -i video_files_tmp.txt -c copy output_tmp.ts
ffmpeg -hide_banner -i output_tmp.ts -c:v libx265 -pix_fmt yuv420p -c:a aac $2$OUTPUT_FILE_NAME

  


  


  




  This did basically the same thing as before.

  



  

  • Tried using the libx265 encoder instead. Same result.

  


  • Then, I tried just playing the concatenated MPEG-TS file directly, which also would freeze at some point during the playback.

  


  



  I was wondering about what ffmpeg flags or options to set to get this working, or other options I could try ? Thanks !

  


• Terminate ffmpeg.exe loop

  5 mars 2019, par jinaho

  Getting a thumbnail from a RTSP source results in infinit output from ffmpeg without exiting which makes the batch script not resume.

  It is basically only one line that calls the ffmpeg process like this (example) :

  ffmpeg -i rtsp://192.168.1.89:554/11 -f image2 -r 1 thumb%03d.jpg

  The input is user generated and for some ffmpeg is not returning a thumbnail but a warning message :

  Could not find codec parameters for stream 0 (Video: h264, 1 reference frame, none(left), 1280x720, 1/180000): unspecified pixel format

  After that instead of quiting and let the batch script resume, ffmpeg outputs :

  Press [q] to stop, [?] for help
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A
  
  frame=    0 fps=0.0 q=0.0 size=N/A time=-577014:32:22.77 bitrate=N/A speed=N/A

  This goes on forever meaning that the batch script does not resume. Manual invertention is required which is not intended.
  I am looking for a way to tell the script that ffmpeg has a hanging condition and make the script quit ffmpeg so it can resume.