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• doc/html : support texinfo 7.0

  8 novembre 2023, par Frank Plowman

  doc/html : support texinfo 7.0
  Resolves trac ticket #10636 (http://trac.ffmpeg.org/ticket/10636).
  Texinfo 7.0, released in November 2022, changed the names of various
  
  functions. Compiling docs with Texinfo 7.0 resulted in warnings and
  
  improperly formatted documentation. More old names appear to have
  
  been removed in Texinfo 7.1, released October 2023, which causes docs
  
  compilation to fail.
  This commit addresses the issue by adding logic to switch between the old
  
  and new function names depending on the Texinfo version. Texinfo 6.8
  
  produces identical documentation before and after the patch.
  CC
  
  https://www.mail-archive.com/debian-bugs-dist@lists.debian.org/msg1938238.html
  
  https://bugs.gentoo.org/916104
  Signed-off-by : Frank Plowman <post@frankplowman.com>
  

  • [DH] doc/t2h.pm

• 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
    )


  


• change audio part from mkv video file to flac audio file without losing quality [closed]

  29 août 2023, par Jimmy wu

  how could I write a Linux command to manipulate ffmpeg to change audio part from mkv video file to flac audio file without losing quality ?

  


  I use following command and I found that the size of audio file is almost the same as video file.

  


  ffmpeg -i "2023-08-28 15-32-02.mkv" -ss 0:0:0 -to 1:9:2

8 -vn -c:a flac 2023_08_28_CPU_DV_1.flac


  


  what command should I use ?

  


  I want to change "only audio part" from mkv video file to flac audio file without losing quality,

  


  then the size of file would not be that big