Recherche avancée

Sur d’autres sites (11448)

• FFmpeg can't process videos with filenames containing emojis on Google Colab

  25 novembre 2022, par athena

  I mounted my Google Drive on Google Colab, inside the Drive, there's a video file with an emoji on it's filename (example : 20221124 [우리의식탁 W TABLE] 직접 기른 허브로 만들면 더 맛있는 허브포카치아 🌿 (8m2hNIEoXEw).mkv).

  


  !ffmpeg -i "/content/drive/MyDrive/DOWNLOAD/20221124 [우리의식탁 W TABLE] 직접 기른 허브로 만들면 더 맛있는 허브포카치아 🌿 (8m2hNIEoXEw).mkv"


  


  Trying to run FFmpeg gives me this error :

  


  ---------------------------------------------------------------------------&#xA;UnicodeEncodeError                        Traceback (most recent call last)&#xA; in <module>&#xA;      3 video = "/content/drive/MyDrive/DOWNLOAD/20221124 [\u110B\u116E\u1105\u1175\u110B\u1174\u1109\u1175\u11A8\u1110\u1161\u11A8 W TABLE] \u110C\u1175\u11A8\u110C\u1165\u11B8 \u1100\u1175\u1105\u1173\u11AB \u1112\u1165\u1107\u1173\u1105\u1169 \u1106\u1161\u11AB\u1103\u1173\u11AF\u1106\u1167\u11AB \u1103\u1165 \u1106\u1161\u11BA\u110B\u1175\u11BB\u1102\u1173\u11AB \u1112\u1165\u1107\u1173\u1111\u1169\u110F\u1161\u110E\u1175\u110B\u1161 \uD83C\uDF3F (8m2hNIEoXEw).mkv" #@param {type: "string"}&#xA;      4 &#xA;----> 5 get_ipython().system(&#x27;ffmpeg -i "$video" #-hide_banner&#x27;)&#xA;&#xA;4 frames&#xA;/usr/local/lib/python3.7/dist-packages/google/colab/_shell.py in system(self, *args, **kwargs)&#xA;     93       kwargs.update({&#x27;also_return_output&#x27;: True})&#xA;     94 &#xA;---> 95     output = _system_commands._system_compat(self, *args, **kwargs)  # pylint:disable=protected-access&#xA;     96 &#xA;     97     if pip_warn:&#xA;&#xA;/usr/local/lib/python3.7/dist-packages/google/colab/_system_commands.py in _system_compat(shell, cmd, also_return_output)&#xA;    435   # stack.&#xA;    436   result = _run_command(&#xA;--> 437       shell.var_expand(cmd, depth=2), clear_streamed_output=False)&#xA;    438   shell.user_ns[&#x27;_exit_code&#x27;] = result.returncode&#xA;    439   if -result.returncode in _INTERRUPTED_SIGNALS:&#xA;&#xA;/usr/local/lib/python3.7/dist-packages/google/colab/_system_commands.py in _run_command(cmd, clear_streamed_output)&#xA;    189           stdin=stdin,&#xA;    190           stderr=child_pty,&#xA;--> 191           close_fds=True)&#xA;    192       # The child PTY is only needed by the spawned process.&#xA;    193       os.close(child_pty)&#xA;&#xA;/usr/lib/python3.7/subprocess.py in __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, encoding, errors, text)&#xA;    798                                 c2pread, c2pwrite,&#xA;    799                                 errread, errwrite,&#xA;--> 800                                 restore_signals, start_new_session)&#xA;    801         except:&#xA;    802             # Cleanup if the child failed starting.&#xA;&#xA;/usr/lib/python3.7/subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, restore_signals, start_new_session)&#xA;   1480                             errread, errwrite,&#xA;   1481                             errpipe_read, errpipe_write,&#xA;-> 1482                             restore_signals, start_new_session, preexec_fn)&#xA;   1483                     self._child_created = True&#xA;   1484                 finally:&#xA;&#xA;UnicodeEncodeError: &#x27;utf-8&#x27; codec can&#x27;t encode characters in position 131-132: surrogates not allowed&#xA;</module>

  


  My Colab uses Python 3.7.15 and ffmpeg/ffprobe version N-109226-g2ad199ae31-20221125 (from https://github.com/BtbN/FFmpeg-Builds).

  


  I tried searching similar issues as mine here, but most of the solutions are way beyond my knowledge, I'm not sure how to apply them to my use case.

  


  I'll appreciate your help, thank you !

  


• Installing "ffmpeg" package from setup.py in Apache Beam pipeline running on Google Cloud Dataflow

  17 avril 2019, par John Allard

  I’m trying to run an Apache Beam pipeline on Google Cloud Dataflow that utilizes FFmpeg to perform transcoding operations. As I understand it, since ffmpeg is not a python package (available through PIP), I need to install it from setup.py using the following lines

  # The output of custom commands (including failures) will be logged in the
  
  # worker-startup log.
  
  CUSTOM_COMMANDS = [
  
      ['apt-get', 'update'],
  
      ['apt-get', 'install', '-y', 'ffmpeg']]

  Unfortunately, this is not working. My pipeline is stalling and when I go to examine the logs I’m seeing this

  

  RuntimeError: Command ['apt-get', 'install', '-y', 'ffmpeg'] failed: exit code: 100

  It appears to be unable to find the package ’ffmpeg’. I’m curious as to why this is - ffmpeg is a standard package that should be available under apt-get.

• Making a ffmpeg screen capture on Mac OS X using YUV 4:2:0 Planar color model

  30 mai 2019, par Bass

  I make screen recordings with ffmpeg, using avfoundation on Mac OS X, x11grab on Linux and gdigrab on Windows.

  The resulting files should be compatible with modern web browsers (<video></video>), so I use H.264 codec and request YUV 4:2:0 Planar pixel format.

  On Mac OS X, however (unlike Linux and Windows), I receive the following logging :

  /usr/local/bin/ffmpeg -y -v error -f avfoundation -threads 0 -hide_banner -i 1:none -f mp4 -vcodec h264 -pix_fmt yuv420p -r 25/1 -qscale:v 1 -vf scale=-1:1080 target.mp4
  
  [avfoundation @ 0x7fdba2003a00] Selected pixel format (yuv420p) is not supported by the input device.
  
  [avfoundation @ 0x7fdba2003a00] Supported pixel formats:
  
  [avfoundation @ 0x7fdba2003a00]   uyvy422
  
  [avfoundation @ 0x7fdba2003a00]   yuyv422
  
  [avfoundation @ 0x7fdba2003a00]   nv12
  
  [avfoundation @ 0x7fdba2003a00]   0rgb
  
  [avfoundation @ 0x7fdba2003a00]   bgr0

  Still, according to mplayer, the resulting MP4 file seems to have YUV 4:2:0 Planar color model :

  [h264 @ 0x1048a8ac0]Format yuv420p chosen by get_format().
  
  [h264 @ 0x1048a8ac0]Reinit context to 1728x1088, pix_fmt: yuv420p
  
  [h264 @ 0x1048a8ac0]Format yuv420p chosen by get_format().
  
  [h264 @ 0x1048a8ac0]Reinit context to 1728x1088, pix_fmt: yuv420p
  
  [swscaler @ 0x1048c3cc0]bicubic scaler, from yuv420p to yuyv422 using MMXEXT
  
  *** [scale] Exporting mp_image_t, 1728x1080x12bpp YUV planar, 2799360 bytes
  
  *** [vo] Allocating mp_image_t, 1728x1080x16bpp YUV packed, 3732480 bytes

  the same confirmed by ffmpeg :

  $ ffmpeg -i target.mp4 -hide_banner
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'target.mp4':
  
    Metadata:
  
      major_brand     : isom
  
      minor_version   : 512
  
      compatible_brands: isomiso2avc1mp41
  
      encoder         : Lavf58.20.100
  
    Duration: 00:00:04.72, start: 0.000000, bitrate: 201 kb/s
  
      Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1728x1080, 197 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
  
      Metadata:
  
        handler_name    : VideoHandler

  Questions :

  1. Can someone explain the above ffmpeg logging ?
  2. If I still need to convert the avfoundation video stream to yuv420p, how do I make it on the fly (in a single ffmpeg pass) ?