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• How can I generate a video file directly from an FFmpeg filter with no actual input file ?

  26 août 2016, par blahdiblah

  FFmpeg has a number of video generating filters, listed in the documentation as "video sources" :

  • cellauto
  • color
  • mptestsrc
  • fei0r_src
  • life
  • nullsrc, rgbtestsrc, testsrc

  Those are great for using with other filters like overlay, but is there any way that I can generate a movie consisting of just one of those video sources without any input video ?

  Something like :

  ffmpeg -vf color=red" red_movie.mp4

  Except that that errors out with At least one input file must be specified.

• convert multivideos from 1080p to 720p and add watermarks with subtitles ?

  20 novembre 2020, par shady melad

  0

  


  i will ask again i have many videos like series (dark - la casa de papel - game of thrones ) all of them without any subtitle or watermark first i burn subtitles with handbrake sec i use ffmpeg to burn watermark with videos by this code

  


  for %i in ("C :\Users\shady\Downloads\convert\01*.mp4") do ffmpeg -i "%i" -i C :\Users\fady\Downloads\convert\shady.png -filter_complex "overlay=main_w-overlay_w-10:10" -codec:a copy "C :\Users\shady\Downloads\convert\new01% ni.mp4"

  


  then i convert it to 720p with this code

  


  for %i in (C :\Users\shady\Downloads\convert\01*.mp4) do ffmpeg -i "%i" -c:a copy -s hd720 "C :\Users\shady\Downloads\convert\new01% ni.mp4"

  


  my question now if i want to burn subtitle for series dark all seasons with my watermark and the final file get out with 720p with subtitle with watermark on top at right

  


  can i do that ?

  


  watermark png subtitle srt movies come with mkv not mp4 ( i want the final file come with mp4 )

  


• FFMPEG - [WinError 2] The system cannot find the file specified

  7 avril 2021, par Jules Dany

  I'm having an issue using the FFmpeg package.

  


  Here's my code :

  


  import ffmpeg_streaming

from ffmpeg_streaming import Formats, Bitrate, Representation, Size

_360p  = Representation(Size(640, 360), Bitrate(276 * 1024, 128 * 1024))
_480p  = Representation(Size(854, 480), Bitrate(750 * 1024, 192 * 1024))
_720p  = Representation(Size(1280, 720), Bitrate(2048 * 1024, 320 * 1024))

hls = video.hls(Formats.h264())
hls.representations(_360p, _480p, _720p)
hls.output('C:/Users/juled/Videos/testStreaming')


  


  Quite simple as you can see, found it on the web.

  


  And here's the error message I have :

  


  Traceback (most recent call last):&#xA;  File "C:\Users\juled\OneDrive\Bureau\PACT\streamingMultimedia\streaming.py", line 50, in <module>&#xA;    hls.output(&#x27;C:/Users/juled/Videos/testStreaming&#x27;)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_media.py", line 93, in output&#xA;    self.run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_media.py", line 121, in run&#xA;    asyncio.run(self.async_run(ffmpeg_bin, monitor, **options))&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\asyncio\runners.py", line 43, in run&#xA;    return loop.run_until_complete(main)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\asyncio\base_events.py", line 583, in run_until_complete&#xA;    return future.result()&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_media.py", line 112, in async_run&#xA;    self._run(ffmpeg_bin, monitor, **options)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_media.py", line 105, in _run&#xA;    with Process(self, command_builder(ffmpeg_bin, self), monitor, **options) as process:&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_process.py", line 58, in __init__&#xA;    self.process = _p_open(commands, **options)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\site-packages\ffmpeg_streaming\_process.py", line 29, in _p_open&#xA;    return subprocess.Popen(shlex.split(commands), **options)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\subprocess.py", line 800, in __init__&#xA;    restore_signals, start_new_session)&#xA;  File "C:\Users\juled\OneDrive\Bureau\Informatique\WPy64-3760\python-3.7.6.amd64\lib\subprocess.py", line 1207, in _execute_child&#xA;    startupinfo)&#xA;FileNotFoundError: [WinError 2] The system cannot find the file specified&#xA;</module>

  


  I've been checking every file quoted in the error message, but only one of them is "my" code, the others are FFmpeg and Python libraries codes.

  


  I'm using IDLEX for Python 3.7.6 on Windows by the way.

  


  I've tried to change some of the FFmpeg library code, especially where subprocess.Popen appears, by putting a shell=True in the parameters. New Error Message, different this time.

  


  I've added FFmpeg to the PATH, no change.

  


  I've reinstalled FFmpeg to be sure, but no change. I'm using this version : python-ffmpeg-video-streaming-0.1.14.

  


  Do any of you have a solution I could try ?

  


  Oh and a friend has the same issue on MAC.