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  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
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Sur d’autres sites (15638)

  • why is streaming to an flv server with ffmpeg only showing black/blank video for clients ?

    6 septembre 2012, par rogerdpack

    When I stream to an flv server, like flash media server, using ffmpeg, like

     ffmpeg -i input -vcodec libx264 rtmp://hostname/streamname

    it turns out black. Why is that ?

  • Generate Black frames between concatenated videos ffmpeg

    9 février 2019, par Alex K

    I’m trying to concatenate 2 videos together using ffmpeg concat, but I want to have there be 2 seconds of black between the 2 videos.

    The problem is that whenever I’ve tried to generate a black video and concatenated it in, the properties never match my input video exactly, and so the concatenation is all broken - the audio is broken or the frames change at the wrong speed or generally concatenation fails.

    Here’s the output of ffmpeg -i my_input_video1.mp4 (and is identical for my_input_video2.mp4) :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input_vid1.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf58.3.100
    
  Duration: 00:00:03.07, start: 0.000000, bitrate: 191 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 480x270, 116 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 63 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler

    How can I generate a 2 second black video with these properties so that it can be concatenated with my input videos ?

  • How to get rid of ffmpeg.exe black terminal in .Net C# ?

    14 juillet 2018, par Muhammad Subhan

    I’m using ffmpeg.exe as a process in C# and encoding some videos with it by parameters to that process and it shows black terminal of encoding process like cmd while encoding. I want to get rid of that terminal. I just want processing to be done at back end and no terminal should be displayed while encoding.

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