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• Evolution #4277 : Pouvoir utiliser InnoDB à la place de MyISAM (patch)

  18 septembre 2019

  Effectivement, si c’est possible, le define ne serait pas utile.
  Mais est-ce que tu pourrais indiquer quel est le paramètre MariaDB à modifier pour avoir ce comportement ?

  Et pour en revenir au define, c’est vraiment un truc sans risque, non ?

• PYTHON How to extract a fragment from video by giving start frame and end frame or exact timestamps in float ?

  13 décembre 2022, par cxnt

  I'm trying to cut out a fragment from video with the given start and end frames indexes or theirs timestamps (preferably frame indexes). So far I've found this Q but it takes floats and convert them to integers hence the output video has inaccurate frames

  


  this is a sample of what I've tried which gives me inaccurate output video

  


  def extract_fragment(input_path, output_path):
    start_time = 3.453453
    end_time = 6.8768678

    ffmpeg_extract_subclip(
        filename=input_path,
        t1=start_time,
        t2=end_time,
        targetname=output_path,
    )


  


  And I also tried to use ffmpeg directly

  


  with duration

  


      subprocess.call(
        [
            "ffmpeg",
            "-start_at_zero",
            "-copyts",
            "-ss",
            start_time,
            "-t",
            end_time - start_time,
            "-i",
            f"{path_to_video}",
            "-c",
            "copy",
            f"{output_video_path}",
        ]
    )


  


      subprocess.call(
        [
            "ffmpeg",
            "-y",
            "-ss",
            str(start_time),
            "-i",
            path_to_video,
            "-t",
            str(end_time),
            "-map",
            "0",
            "-vcodec",
            "copy",
            "-acodec",
            "copy",
            output_video_path,
        ]
    )


  


• FFMPEG - why zoompan causes unexpected stretching ?

  14 septembre 2020, par Sarmad S.

  I have two images as input, both are 1600x1066. I am vertically stacking them. Then I am drawing a box and vertically stacking that box under both of the image. Inside of the box I write text, then I output a video that is 1080x1920. Everything works well, until I use zoompan to zoom in on the images, I get weird behavior. basically all input images including the box stretchs (shrink) vertically and no longer fit the entire height of the video which is 1920.

  


  The command (removed some drawtext commands from it) :

  


  -filter_complex 
"color=s=1600x1066:color=blue, drawtext=fontfile=font.otf: text='My Text':fontcolor=white: fontsize=30: x=50: y=50[box]; 
[0]scale=4000x4000,zoompan=z='min(zoom+0.0015,1.5)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=125:s=1600x1066[z0];
[1]scale=4000x4000,zoompan=z='min(zoom+0.0015,1.5)':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':d=125:s=1600x1066[z1];
[z0][z1][box]vstack=inputs=3"


  


  How do I fix this ? I want to zoom in without stretching the images

  


  Before using zoompan this is how the video looks like (I want to keep it this way while zooming in the images) :


  


  After using zoompan this is how the video looks like :