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• How to pass BytesIO image objects to ffmpeg ?

  13 avril 2023, par Mr.Slow

  I a have a (nested) list od BytesIO objects (images) that I would like to pass to ffmpeg and make a video. I do know, the ffmpeg cannot take it straight. What should I convert it in first ? There might be a better way using 'pipe :', which I did not succeed to implement yet.
(in this example code I ignore image duration and audio, too)

  


  def merge_videos(file_id: float, audio_list: List[BinaryIO], duration_list: List[float], images_nested_list):
    # flatten the nested list of images
    images_list = [image for images_sublist in images_nested_list for image in images_sublist]
    
    additional_parameters = {'c:a': 'aac', 'c:v': 'libx264'}

    # Create a BytesIO object to hold the output video data
    output_data = io.BytesIO()

    # create the FFmpeg command with the specified parameters and pipe the output to the BytesIO object
    command = ffmpeg.output(*images_list, '-', vf='fps=10,format=yuv420p', preset='veryfast', shortest=None, r=10, max_muxing_queue_size=4000, **additional_parameters).pipe(output_data)

    try:
        # run the FFmpeg command with error and output capture
        subprocess.check_output(['ffmpeg', '-y', '-f', 'concat', '-safe', '0', '-i', 'audio.txt', '-i', '-', '-c:v', 'copy', '-c:a', 'aac', f"{PROJECT_PATH}/data/final-{file_id}.mp4"], input=output_data.getvalue())
        log.info("Final video with file_id %s has been converted successfully", file_id)


  


  ...this code returns :

  


  TypeError: Expected incoming stream(s) to be of one of the following types: ffmpeg.nodes.FilterableStream; got <class>&#xA;</class>

  


  How to handle it please ? Thanks for help.

  


• How does the dataflow look like in case of using ffmpeg and ffserver ?

  6 mai 2015, par randomuser1

  I can capture the camera image by ffmpeg and send it to ffserver, but what happens next with the data ? Can I collect it on the other site with some other client that uses ffmpeg (e.g. some c# wrapper for it) ? If so - how exactly does the data look like and how can I present it to the final user ? Can I just display the data on display port ? Or is there some other controller for that ?
  Thanks !

• Anomalie #2676 : IE8 : les onchange et tests checked ont des comportements bizarres

  5 mai 2012, par cedric -

  meme si on remplace les onchange par des onclick, il faut bien tester l’etat de checked pour etre synchro. Qui plus est, il faudrait dans ce cas aussi agir sur le onkeydown pour le cas de modification au clavier. Cela est lourd au final, et je ne suis pas sur que ça en vaille le coup. Je (...)