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• Does FFmpeg currently support AVIF ?

  19 juillet 2022, par user19098011

  I installed FFmpeg using Chocolatey and confirmed that it is the latest version.
In order to convert the png file into an avif file, I gave the command as below in the cmd window of the administrator's authority.

  


  ffmpeg -i input.png output.avif


  


  Naturally, there are no characters in the file directory other than the ASCII code.
The following error codes were issued :

  


  [NULL @ 00000211e91fd800] Unable to find a suitable output format for 'output.avif'
output.avif: Invalid argument


  


  And I tried googling a few times.

  


  


  https://trac.ffmpeg.org/ticket/7621
  
https://avif.io/blog/tutorials/ffmpeg/

  


  


  etc. in other googling, there were no meaningful results.
Anyway, AVIF is supported on these sites.
I tried to write commands as they were required, but the command ffmpeg -i image.png -c:v libaom-av1 -still-picture 1 image.avif provided by the avif.io site did not work with the following error codes left below.

  


  


  Unrecognized option 'still-picture'.
  
Error splitting the argument list : Option not found

  


  


  AVIF is such a recent format that I don't even know if it's really supported by FFmpeg.
It is sure ? What should I do ? And if FFmpeg does not support AVIF, what can be a substitute ?

  


• FileNotFoundError running ffmpeg on Windows from Python subprocess

  4 avril 2023, par mahmoudamintaha

  this is my code to convert mkv to mp4
i created both assets and results folders
i added ffmpeg to user and enviroment variables path

  


  import os
import subprocess

if not os.path.exists("assets"):
    raise Exception("Please create and put all MKV files in assets folder. ")

mkv_list = os.listdir("assets")

if not os.path.exists("results"):
    os.mkdir("results")

for mkv in mkv_list:
    name, ext = os.path.splitext(mkv)
    if ext != ".mkv":
        raise Exception("Please add MKV files only!")

    output_name = name + ".mp4"

    try:
        subprocess.run(
            ['ffmpeg', '-i', f"assets/{mkv}", "-codec", "copy", f"results/{output_name}"], check=True
        )

    except:
        raise Exception(
            "Please, download, install and Add the path FFMPEG to Enviroment variables ")

print(f"{len(mkv_list)} video/s have ben converted")
os.startfile("results")


  


  i get this error messages when i run it

  


  ---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
Cell In[1], line 20
     19 try:
---> 20     subprocess.run(
     21         ['ffmpeg', '-i', f"assets/{mkv}", "-codec", "copy", f"results/{output_name}"], check=True
     22     )
     24 except:

File c:\Users\HP\anaconda3\envs\Projectvenv\Lib\subprocess.py:546, in run(input, capture_output, timeout, check, *popenargs, **kwargs)
    544     kwargs['stderr'] = PIPE
--> 546 with Popen(*popenargs, **kwargs) as process:
    547     try:

File c:\Users\HP\anaconda3\envs\Projectvenv\Lib\subprocess.py:1022, in Popen.__init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, user, group, extra_groups, encoding, errors, text, umask, pipesize, process_group)
   1019             self.stderr = io.TextIOWrapper(self.stderr,
   1020                     encoding=encoding, errors=errors)
-> 1022     self._execute_child(args, executable, preexec_fn, close_fds,
   1023                         pass_fds, cwd, env,
   1024                         startupinfo, creationflags, shell,
   1025                         p2cread, p2cwrite,
   1026                         c2pread, c2pwrite,
   1027                         errread, errwrite,
   1028                         restore_signals,
   1029                         gid, gids, uid, umask,
   1030                         start_new_session, process_group)
   1031 except:
   1032     # Cleanup if the child failed starting.

File c:\Users\HP\anaconda3\envs\Projectvenv\Lib\subprocess.py:1491, in Popen._execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, unused_restore_signals, unused_gid, unused_gids, unused_uid, unused_umask, unused_start_new_session, unused_process_group)
   1490 try:
-> 1491     hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
   1492                              # no special security
   1493                              None, None,
   1494                              int(not close_fds),
   1495                              creationflags,
   1496                              env,
   1497                              cwd,
   1498                              startupinfo)
   1499 finally:
   1500     # Child is launched. Close the parent's copy of those pipe
   1501     # handles that only the child should have open.  You need
   (...)
   1504     # pipe will not close when the child process exits and the
   1505     # ReadFile will hang.

FileNotFoundError: [WinError 2] The system cannot find the file specified

During handling of the above exception, another exception occurred:

Exception                                 Traceback (most recent call last)
Cell In[1], line 25
     20         subprocess.run(
     21             ['ffmpeg', '-i', f"assets/{mkv}", "-codec", "copy", f"results/{output_name}"], check=True
     22         )
     24     except:
---> 25         raise Exception(
     26             "Please, download, install and Add the path FFMPEG to Enviroment variables ")
     28 print(f"{len(mkv_list)} video/s have ben converted")
     29 os.startfile("results")

Exception: Please, download, install and Add the path FFMPEG to Enviroment variables 


  


  I checked adding ffmpeg to environment variable and it's added
I used jupyter to know the specific line the doesn't work and it's the subprocess line

  


• Anomalie #4200 : Les accents dans les liens hypertextes

  24 octobre 2018, par Jules Balarate

  Pas de squelette. Quelques plugins. Me semble (je peux me tromper) qu’ils ne font qu’insérer leurs noisettes
  PHP 7.0 ne change rien : le pointage reste corrigé