Recherche avancée

Sur d’autres sites (8247)

• How do you set up carrierwave-video with ffmpeg ?

  24 septembre 2013, par Maleckai

  This has been doing my head in for the past 2 days, and I just cannot seem to get it working.

  I am building a simple Rails app with the sole purpose of uploading & processing images and videos. I'm working on Ubuntu Linux.

  Here's the relevant gems in my Gemfile :

  gem 'delayed_job_active_record'
  
  gem 'carrierwave'
  
  gem 'carrierwave-video'
  
  gem 'carrierwave_backgrounder'
  
  gem 'mini_magick'
  
  gem 'streamio-ffmpeg'

  At first I was having problems with ffmpeg complaining about certain arguments (I determined this by taking the command the rails app attempted to run when it was to convert a video, and running it manually outside rails), which I discovered was because the version of ffmpeg I was using was 'too new'. So I downgraded to 1.2.1, which is what streamio-ffmpeg says is the only version of ffmpeg they're tested against.

  After that, I could run the command manually, fine. But whenever I tried to convert through the app, I'd get the error :

  Failed to transcode with FFmpeg. Check ffmpeg install and verify video is not corrupt or cut short. Original error: nil is not a symbol

  I did a bit of Googling on the error, and only came up with one relevant result, but nothing in there has helped my situation.

  I'm at a total loss at this point, and am not sure where I can go from here. I assume many of people have tried this before, so I'm hoping someone can guide me on the exact steps they took to get carrierwave-video & ffmpeg working together.

• ffmpeg batch reencode with subfolders

  25 janvier, par Alan

  I am trying to reencode a few hundred videos to X265 but there are many directories that have spaces in the filenames as do some of the files. I have looked at a bunch of scripts and am struggling to find one that works with the spaces and the different directory levels.

  



  This one works, as long as there is no sub directories :

  



  #!/bin/bash
for i in *.avi;
do 
    ffmpeg -i "$i" -c:v libx265 -c:a copy X265_"$i"
done


  



  I have been trying to work with this bash script, but it fails with the whitespaces I am guessing.

  



  #!/bin/bash
inputdir=$PWD
outputdir=$PWD
while IFS= read -r file ; do
  video=`basename "$file"`
  dir=`dirname "$file"`
 ffmpeg -fflags +genpts -i "$file" -c:v libx265 -c:a copy "$dir"/X265_"$video"
done < <(find "$inputdir" -name "*.avi" | head -100)


  



  On this thread it looks like a good solution for windows users, but not linux.
FFMPEG - Batch convert subfolders

  



  FOR /r %%i in (*.mp4) DO ffmpeg32 -i "%%~fi" -map 0:0 -map 0:1 -map 0:1 -c:v copy -c:a:0 aac -b:a 128k -ac 2 -strict -2 -cutoff 15000 -c:a:1 copy "%%~dpni(2)%%~xi"

  



  If you can point me to the right solution that is appropriate for bash, I would appreciate it.

  


• ffmpeg batch reencode with subfolders

  4 octobre 2016, par Alan

  I am trying to reencode a few hundred videos to X265 but there are many directories that have spaces in the filenames as do some of the files. I have looked at a bunch of scripts and am struggling to find one that works with the spaces and the different directory levels.

  This one works, as long as there is no sub directories :

  #!/bin/bash
  
  for i in *.avi;
  
  do 
  
      ffmpeg -i "$i" -c:v libx265 -c:a copy X265_"$i"
  
  done

  I have been trying to work with this bash script, but it fails with the whitespaces I am guessing.

  #!/bin/bash
  
  inputdir=$PWD
  
  outputdir=$PWD
  
  while IFS= read -r file ; do
  
    video=`basename "$file"`
  
    dir=`dirname "$file"`
  
   ffmpeg -fflags +genpts -i "$file" -c:v libx265 -c:a copy "$dir"/X265_"$video"
  
  done < <(find "$inputdir" -name "*.avi" | head -100)

  On this thread it looks like a good solution for windows users, but not linux.
  FFMPEG - Batch convert subfolders

  FOR /r %%i in (*.mp4) DO ffmpeg32 -i "%%~fi" -map 0:0 -map 0:1 -map 0:1 -c:v copy -c:a:0 aac -b:a 128k -ac 2 -strict -2 -cutoff 15000 -c:a:1 copy "%%~dpni(2)%%~xi"

  If you can point me to the right solution that is appropriate for bash, I would appreciate it.