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• ffmpeg to nginx rtmp on windows got I/O error

  18 février 2019, par Wolvesled
  1. using https://github.com/illuspas/nginx-rtmp-win32
  2. windows server 2018
  3. no touch to conf, just illuspas original, run nginx.exe as admin
  4. firewall disabled
  5. no antivirus
  6. service started as a charm, no error in nginx log

  run following cmdline as admin

  ffmpeg -re -i "rtsp ://111.10.31.131:554/pag ://192.168
  .1.5:7302:001110:0:MAIN:TCP ?cnid=2&pnid=1" -f flv -s 640x480 "rtmp ://localhost:1
  935/live/abc" -loglevel debug

  i got this :
  see this pic : https://i.stack.imgur.com/3RpNY.jpg

  I want to put the rtsp source to a rtmp channel, why im getting this rtsp ://***** I/O error ? what does that mean ? any idea that i could get this rtmp stream ?

  any input would be appreciated !

• FFmpeg Image to Video command consuming 100% CPU

  23 décembre 2023, par Dishan Verma

  I am working on a project where I need to first extract all the frames of videos and after extracting the frames I need to stitch the frames back again showing 1 frame for exactly 1 seconds i.e I need to create a 1 FPS video from extracted frames.

  


  I am successfully able to extract frames of video using ffmpeg without any issues.

  


  But my FFmpeg command which I am using to convert frames to 1 FPS video is consuming 100% CPU, for example a 40 mb video input is consuming 8 GB of CPU. Below is how my FFmpeg command looks like.

  


  final String ffmpegCommandFormat = "%s -framerate 1 -i %s -c:v libx264 -pix_fmt yuv420p -crf 18 -y %s";
final String ffmpegCommand = String.format(ffmpegCommandFormat, FFMPEG_EXEC_PATH, framesPathRegex, pathToStoreProcessedVideo);


  


  I am creating a service which needs to support around 2 GB sized videos and with the current behaiviour it cannot even support 100 MB of video.

  


  Can anyone please help me here to understand why FFmpeg is consuming too high CPU and how can i resolve this issue ?
Is there any alternate/better/fast/efficient command which I can use to created 1 FPS video wither from extracted frames or directly from input video ?

  


  I am new to ffmpeg so not sure what else to explore.

  


• ffmpeg via pipe : stream 1, offset 0x30 : partial file

  5 octobre 2024, par Dito Adriel

  my videodata is dynamic it can use any exension but its error when i use mp4 extension.

  


  my function :

  


  func (s *service) convertVideo(videoData []byte) ([]byte, error) {
    var buffer bytes.Buffer
    cmd := exec.Command("ffmpeg",
        "-i", "pipe:0",
        "-c:v", "libvpx-vp9",
        "-b:v", "0",
        "-f", "webm",
        "-t", "8",
        "-preset", "ultrafast",
        "pipe:1")
    cmd.Stdin = bytes.NewReader(videoData)
    cmd.Stdout = &buffer
    err := cmd.Run()
    if err != nil {
        return nil, err
    }
    return buffer.Bytes(), nil
}


  


  and got error :

  


  stream 1, offset 0x30: partial file
Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none, 720x1280, 773 kb/s): unspecified pixel format


  


  is it because i use stream pipe ? becuase if i use temp file its success, but its not that effective.

  


  New

  


  if i convert my mp4 to mp4 first, then it success. so the cause of problem is from my mp4, but still not found the solution in code.