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• How do I pipe files into whisper.cpp ?

  9 juillet 2023, par d-b

  whisper.cpp only supports wav-files. I have files in other formats I want to transcribe. It would be nice if I could make the conversion and transcription in one step/using a one-liner.

  


  I have tried these two, and some variant, but they failed :

  


  whisper.cpp -m ~/usr/whisper.cpp/models/ggml-large.bin < ffmpeg -i sample.amr -f wav

ffmpeg -i sample.amr -f wav pipe:1  | whisper.cpp -m ~/usr/whisper.cpp/models/ggml-large.bin


  


  From the whisper.cpp help page :

  


  usage: whisper.cpp [options] file0.wav file1.wav ...

  -f FNAME,  --file FNAME        [       ] input WAV file path


  


  (The help page doesn't mention stdin, pipes etc)

  


• Copy Video codec results in BrokenPipeError : [Errno 32] Broken pipe Python ImageIO

  3 mars 2023, par 433MEA

  I am trying to use ImageIO to create a video from a sequence of 3 PNG's. I need the frames of the video to be exactly the same as the 3 PNG's, so I am using the copy video codec. If I use codecs that are compressed (like H.264), the code works perfectly fine, but the frames in the video are different.

  


  I am using ImageIO version 2.26.0 and have FFMpeg version 5.1.2 installed, though the code seems to be using version 4.2.2.

  


  Here is my code :

  


  from imageio import get_writer, imread
 
video = get_writer('encoded.mp4',fps=60,codec='copy')

for i in range(3):

    video.append_data(imread(f'image{str(i)}.png'))

video.close()


  


  But an error occurs :

  


  Traceback (most recent call last):&#xA;  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imageio_ffmpeg/_io.py", line 615, in write_frames&#xA;    p.stdin.write(bb)&#xA;BrokenPipeError: [Errno 32] Broken pipe&#xA;&#xA;During handling of the above exception, another exception occurred:&#xA;&#xA;Traceback (most recent call last):&#xA;  File "/Users/Raine/Documents/FileEnconderInVideo/main.py", line 7, in <module>&#xA;    video.append_data(imread(f&#x27;image{str(i)}.png&#x27;))&#xA;  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imageio/core/format.py", line 590, in append_data&#xA;    return self._append_data(im, total_meta)&#xA;  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imageio/plugins/ffmpeg.py", line 600, in _append_data&#xA;    self._write_gen.send(im)&#xA;  File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imageio_ffmpeg/_io.py", line 622, in write_frames&#xA;    raise IOError(msg)&#xA;OSError: [Errno 32] Broken pipe&#xA;&#xA;FFMPEG COMMAND:&#xA;/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/site-packages/imageio_ffmpeg/binaries/ffmpeg-osx64-v4.2.2 -y -f rawvideo -vcodec rawvideo -s 3840x2160 -pix_fmt rgb24 -r 60.00 -i - -an -vcodec bmp -pix_fmt yuv420p -v warning /Users/Raine/Documents/FileEnconderInVideo/video.mp4&#xA;&#xA;FFMPEG STDERR OUTPUT:&#xA;&#xA;</module>

  


  What is wrong ?

  


  Thank you !

  


• How to put the output of ffmpeg into a pipe in Python ? [duplicate]

  16 février 2023, par Eric Palmer

  I'm trying to use python to feed the results of ffmpeg into a pipeline, and then I can use this pipeline for subsequent operations (such as rtmp streaming). I've written the correct command, but I don't know how to accomplish this with Python.

  


  I wrote the following code in the Shell, it can run correctly.

  


  ffmpeg -re -i '2023-02-16_21:02:50.mp4' -f mpegts -c:v copy -c:a aac -vbsf h264_mp4toannexb pipe:1.ts | cat >> push


  


  When I'm trying to do the above in Python, I'm getting an error.

  


  cat: '>>': No such file or directory


  


  Here is my python code.

  


  command = [
    'docker',
    'run',
    '-v',
    f'{cwd}:{cwd}',
    '-w',
    f'{cwd}',
    'jrottenberg/ffmpeg',
    '-re',
    '-i', f'{video_path}',
    '-f', 'mpegts',
    '-c:v', 'copy',
    '-c:a', 'aac',
    '-vbsf', 'h264_mp4toannexb',
    'pipe:1.ts',
]

pa = subprocess.Popen(
    command,
    stdout = subprocess.PIPE,
    stderr = error_file
)

command = [
    'cat',
    '>>',
    f'{pipe_name}'
]

with pa.stdout:
    pb = subprocess.Popen(
        command,
        stdin = pa.stdout,
        stdout = error_file,
        stderr = error_file
    )