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Sur d’autres sites (11252)

  • ffmpeg in Python subprocess - Unable to find a suitable output format for 'pipe :'

    12 juillet 2016, par Spencer

    Trying to burn subs into video with ffmpeg via Python. Works fine in the command line, but when calling from Python subprocess with :

    p = subprocess.Popen('cd ~/Downloads/yt/; ffmpeg -i ./{video} -vf subtitles=./{subtitles} {out}.mp4'.format(video=vid.replace(' ', '\ '), subtitles=subs, out='out.mp4'), shell=True)

    I get :

    Unable to find a suitable output format for 'pipe:'

    Full traceback :

    'ffmpeg version 2.7.2 Copyright (c) 2000-2015 the FFmpeg developers
    
  built with Apple LLVM version 6.1.0 (clang-602.0.53) (based on LLVM 3.6.0svn)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/2.7.2_1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libfreetype --enable-libvpx --enable-libass --enable-libfdk-aac --enable-nonfree --enable-vda
    
  libavutil      54. 27.100 / 54. 27.100
    
  libavcodec     56. 41.100 / 56. 41.100
    
  libavformat    56. 36.100 / 56. 36.100
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 16.101 /  5. 16.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.100 /  1.  2.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './OnHub - a router for the new way to Wi-Fi-HNnfHP7VDP8.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf56.36.100
    
  Duration: 00:00:53.94, start: 0.000000, bitrate: 2092 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 1961 kb/s, 23.98 fps, 23.98 tbr, 90k tbn, 47.95 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
[NULL @ 0x7fc07b077600] Unable to find a suitable output format for 'pipe:'
    
pipe:: Invalid argument'

  • Could not find ref with POC ffmpeg H265

    7 juin 2021, par user1307697

    I'm trying to develop a video streaming with H265. Unfortunately, in decoding phase, I have these errors :

    


    [hevc @ 0x5563d05b4940] Could not find ref with POC

    


    and the resulting frames are corrupted.

    


    I cannot understand the meaning of this type of error. How can I fix it ?

    


  • Combining find -execdir with grep

    31 mai 2021, par pasan

    I want to go through a bunch of files in various sub folders within a root directory quickly to get the video and audio format type.

    


    I can get the information I need from a single file using :

    


    ffprobe file.mp4 2>&1 >/dev/null | grep "Stream"


    


    I can run ffprobe for each file inside the root folder using

    


    find . -name "*.mp4" -execdir ffprobe "{}" \;


    


    What I am struggling with is to use grep with the second command to filter the output I want (as per the first command) and pipe the entire output into a file.
What is the missing link/s here ?

    


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