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• ffmpeg : error reading header pipe:0 : Invalid argument

  25 février 2021, par Дмитрий Бондаренко

  I need microservice (converter audio using streams), but have problem with ffmpeg

  


  my test ffmpeg

  


  package codec

import (
    "bytes"
    "os"
    "os/exec"
    "testing"
)

func Test1(t *testing.T) {
    in, err := os.Open("/mp4-mp3/src.m4a")
    if err != nil {
        t.Fatal(err.Error())
    }
    out, err := os.OpenFile("/mp4-mp3/out.mp3", os.O_RDWR|os.O_CREATE, 0666)
    if err != nil {
        t.Fatal(err.Error())
    }
    cmd := exec.Command(
        "ffmpeg",
        "-f", "m4a",
        "-i", "pipe:0",
        "-f", "mp3",
        "pipe:1")

    cmd.Stdin = in
    cmd.Stdout = out
    stderr := &bytes.Buffer{}
    cmd.Stderr = stderr
    if err := cmd.Run(); err != nil {
        t.Logf(stderr.String())
        t.Fatal(err.Error())
    }

}



  


  At the exit, I have the error invalid argument
i tried different options but the problem didn't change

  


  === RUN   Test1
    codec_test.go:31: ffmpeg version git-2020-08-31-4a11a6f Copyright (c) 2000-2020 the FFmpeg developers
          built with gcc 10.2.1 (GCC) 20200805
          configuration: hide...
          libavutil      56. 58.100 / 56. 58.100
          libavcodec     58.101.101 / 58.101.101
          libavformat    58. 51.101 / 58. 51.101
          libavdevice    58. 11.101 / 58. 11.101
          libavfilter     7. 87.100 /  7. 87.100
          libswscale      5.  8.100 /  5.  8.100
          libswresample   3.  8.100 /  3.  8.100
          libpostproc    55.  8.100 / 55.  8.100
        [mov,mp4,m4a,3gp,3g2,mj2 @ 0000019ccc3acb40] error reading header
        pipe:0: Invalid argument
    codec_test.go:32: exit status 1
--- FAIL: Test1 (0.07s)
FAIL

Process finished with exit code 1


  


  i decided to use cmd, but i have new problem
pipe:0 : Invalid data found when processing input

  


  cat src.m4a | ffmpeg -f m4a -i pipe:0 out.mp3
ffmpeg version git-2020-08-31-4a11a6f Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.1 (GCC) 20200805
  configuration: hide...
  libavutil      56. 58.100 / 56. 58.100
  libavcodec     58.101.101 / 58.101.101
  libavformat    58. 51.101 / 58. 51.101
  libavdevice    58. 11.101 / 58. 11.101
  libavfilter     7. 87.100 /  7. 87.100
  libswscale      5.  8.100 /  5.  8.100
  libswresample   3.  8.100 /  3.  8.100
  libpostproc    55.  8.100 / 55.  8.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000019afa98d800] invalid STSD entries 1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000019afa98d800] error reading header
pipe:0: Invalid data found when processing input



  


  How to properly set ffmpeg parameters to convert from stream to stream ?

  


• ffmpeg pipe to generate h264 chunks from numpy array or bgr24 bytes

  25 février 2021, par harsh solanki

  is there a possibility if someone can help me with FFmpeg pipe to generate h264 chunks from NumPy array

  


  This is what I am doing now :

  


  process = (
ffmpeg
.input('pipe :', format='rawvideo', pix_fmt='bgr24', s='{}x{}'.format(self._deeptwin.image_width, self._deeptwin.image_height))
.output(path, pix_fmt='yuv420p', vcodec='libx264', r=25)
.overwrite_output()
.run_async(pipe_stdin=True)
)

  


  for res in response:
    st = datetime.datetime.now()
    print(f'{res.status} image {res.id} rendered at {datetime.datetime.now()}')
    img = np.frombuffer(res.image, dtype=np.uint8)
    img = img.reshape((int(self._deeptwin.image_height * 1.5), self._deeptwin.image_width))
    img = cv2.cvtColor(img, cv2.COLOR_YUV2BGR_I420)
    
    for frame in img:
        start = datetime.datetime.now()
        process.stdin.write(
            frame
            .astype(np.uint8)
            .tobytes()
        )
        end = datetime.datetime.now()
    stop = datetime.datetime.now()
    print(f'{res.id} conversion done at {stop-st}')
process.stdin.close()
process.wait()


  


  `
What this is doing currently is generating an out.h264 file. It is fine and playing a correct video as well.

  


  However, what I need to achieve : I want to generate chunks of h264 frames in the following way : 1.h264, 2.h264............n.h264

  


  Any guidance would be really appreciated and helpful.

  


  Thanks in advance.

  


• FFmpeg errors using pipe input instead of file input [duplicate]

  1er mars 2021, par Michael Werner

  I try to do several conversions (e.g. codec conversion of videos, extracting single frames etc.) via FFmpeg on 64-bit Windows OS. This works fine if I use files as input for FFmpeg.exe

  


  This works :

  


  


  ffmpeg.exe -hide_banner -loglevel debug -i "C :\blabla\OA9.mp4" -deinterlace -vframes 1 -c:v bmp -f image2pipe pipe : > test1.bmp

  


  


  This does not work :

  


  


  type "C :\blabla\OA9.mp4" | ffmpeg.exe -hide_banner -loglevel debug -i pipe : -deinterlace -vframes 1 -c:v bmp -f image2pipe pipe : > test1.bmp

  


  


  It causes the following errors / warnings :

  


  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000023C6E86E600] stream 0, offset 0x30 : partial file
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000023C6E86E600] Could not find codec parameters for stream 0 (Video : h264, 1 reference frame (avc1 / 0x31637661), none, 576x456, 1/30720, 2200 kb/s) : unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options

  


  


  


  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000023C6E86E600] stream 0, offset 0x30 : partial file
pipe: : Invalid data found when processing input
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished

  


  


  I already tried several "things" like specifying input pixel format, setting the 'analyzeduration' and 'probesize' options to int_max (2147483647) but the result is the same (console output).

  


  Does someone know this issue and maybe even knows a solution ?