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• cut hls files in to many small ".ts" files or keep one big ".ts" file. which is better ?

  5 août 2022, par Evan Lee

  I need to stream my videos using HLS bytes range HTTP requests.

  


  FFmpeg has an option to keep all the ts file to one single large ".ts" file.

  


  Any pros and cons of split the ts files or keep a big ts file ?

  


  Is a big ts file make the request slower ? because of HDD fseek is slow ?

  


• Concat video files using ffmpeg in individual subfolders with shell script [closed]

  18 août 2022, par Weatherdark

  I had a Windows script that would do what I want, but I switched my server to Unraid so now I need a new script. Anyway, enough backstory.

  


  I regularly have media that is named in a style like "Videoname CD(Number).ext". They get stored in subfolders called Videoname with a different folder for each video.

  


  What I need is a script that goes through each subfolder and creates a concat.txt file with the names of each video file ending in CD(number) in it, in numerical order, that will then call ffmpeg to concat the files using the concat.txt in each subfolder, placing the video file (named after the subfolder) into a folder like /mnt/User/Pool/Finished/Videofile. Then, hopefully it will delete the concat.txt file so I know which folders are finished with a quick look.

  


  I know the ffmpeg concat options for that part, I just have no idea what to use to make sure the resulting video file is named after the subfolder it came from.

  


  I could do this in Windows (albeit in a hacky, not very pretty way), but I have no idea how to accomplish this in Linux.

  


  As an example...

  


  


  /mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD1.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD2.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD3.mp4
/mnt/User/Pool/Concat/10.10.2022.0034.Recording/10.10.2022.0034.Recording
CD4.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD1.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD2.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD3.mp4
/mnt/User/Pool/Concat/10.11.2022.0254.Recording/10.11.2022.0254.Recording
CD4.mp4

  


  Put through ffmpeg to concat, results in files

  


  /mnt/User/Pool/Finished/10.10.2022.0034.Recording.mp4

  


  /mnt/User/Pool/Finished/10.11.2022.0254.Recording.mp4

  


  


  Hopefully that makes sense.

  


  Someone closed this because it wasn't "focused enough" and didn't focus on one thing... but there is ONLY one thing that it needs to do.

  


  I have no idea what they would want me to change to fix what isn't broken, so I fundamentally am at a loss. The script just needs to search through subfolders, create a concat.txt file and send that file to ffmpeg creating the new file, named after the folder, in a new location. That is literally as focused as I can make it.

  


• FFmpeg / python - command works when run from shell but fails when run from python

  4 avril 2019, par artembus

  I have a python script which should run an ffmpeg command with this function :

  def transcode(in_path, out_path):
  
      cmd = ["ffmpeg", "-y", "-i", in_path, '-vf smartblur=lr=1']
  
      cmd += ["-an", out_path]
  
      print("Running:", " ".join(cmd))
  
      subprocess.run(cmd, stdout=cmdout, stderr=cmdout)

  When I run the python script it fails with this ffmpeg error :

  Running: ffmpeg -y -i raid/orig/scenes/train/5786088.mp4 -vf smartblur=lr=1 -an raid/4K/scenes/train/5786088.mp4
  
  ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Unrecognized option 'vf smartblur=lr=1'.
  
  Error splitting the argument list: Option not found

  You can see the command it tries to execute in the first line, when I run it in the command line it works fine. When I run the command in the shell it outputs the same version and parameters of the ffmpeg as written in the error above.

  I feel like I missed something simple yet crucial, anyone can point me to the right direction ?