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• 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.

  


• run ffmpeg commands from my own project

  28 octobre 2013, par bruno

  I'm starting a project where I want ppl to upload videos of a talk and a the video of slides for that talk and want to merge them (to play at the same time) and then show results.

  My question is :
  Is it possible to do that from code ? if it is, can you point me to the right doc ?
  I was able to do it running command line, but as I want this to run on a server with different ppl uploading their videos I think this would not be the best approach.
  I have a preference for Java if it's possible to do it, but I can manage to use other languages what do you guys suggest ?

  The idea would be to have a service where I can point the urls of the videos stored in my server and it would merge them and save file where I can later stream. With different ppl uploading videos at the same time and being able to watch the result in a reasonable amount of time.

  I used this tutorial to test :
  https://trac.ffmpeg.org/wiki/Create%20a%20mosaic%20out%20of%20several%20input%20videos

  Thanks for your time

• FFMPEG - Converting MKV to MP4 on Gdrive using rclone mount. ERROR : output file #0 does not contain any stream

  30 avril 2020, par Enrique Torrez

  I am trying to convert video files from my back-up rip files library that I have on my Gdrive account. I was successfully able to set up a dedicated server + plexserver + rclone + gdrive. I have files that are big and my family are not able to stream them due to the poor internet service that I have in my country. So I am trying to reduce the file size so it can be streamed directly

  



  My rclone mount script is :

  



  rclone mount gcache: /path  --tpslimit 5 --allow-other --acd-templink-threshold 0 --stats 1s --buffer-size 64M --timeout 5s --contimeout 5s --max-read-ahead 1G --drive-chunk-size 64M -vv &


  



  And my ffmpeg script is :

  



  ffmpeg -i origen.mkv -c:v copy -movflags faststart -strict -2 convertedfile.mp4


  



  I had the following errors :

  



  moov atom not found


  



  I used this command :

  



  AtomicParsley myVideo.mp4 -P


  



  Now when I execute

  



  ffmpeg -i convertfile.mp4


  



  I get this error :

  



  Output file #0 does not contain any stream


  



  What am I doing wrong ? I need some help please.