ffmpeg + mp3 convert

rubyonrails-talk
1

Hi Pete,

What exactly is the error message you're getting when it fails? I may be wrong, but I think it's trying to call ffmpeg without a file path. I say that because, based on my rudimentary understanding of Ruby, the mp3 object doesn't exist inside the scope of convert_mp3.

So instead, try something like this:

private def convert_mp3   system("ffmpeg -i #{self.mp3.to_file.path} -vn -ar 44100 -ac 2 -ab 64 -f mp3 #{mp3.to_file.path}") end

(I recommend putting that inside private for security reasons.)

If that doesn't work, try to copy-paste the command itself into a shell, substitute the filename for something you know is there and should work, and try that. In other words, try to isolate where the problem is - in the code, or in the execution of ffmpeg.

2

Hi, thx for your suggestions,

but it doesn't work either. :frowning: it always return the message "Whoops! File was NOT uploaded. Please try it again." // message from my tracks controller.

  def create     #@track = logged_in_user.tracks.build(params[:track])     @track = Track.new(params[:track])

    if logged_in_user.tracks << @track        flash[:notice] = "Successfully uploaded."            redirect_to :action => :index       else       flash[:error] = "Whoops! File was NOT uploaded. Please try it again."            render :action => :new       end   end

Could it be the command itself and its syntax? "ffmpeg -i #{self.mp3.to_file.path} -vn -ar 44100 -ac 2 -ab 16 -f mp3 #{mp3.to_file.path}"

Pete

Phoenix Rising wrote:

3

Well, that's what I was thinking: isolate your ffmpeg command and see if it's working correctly. Get a file that you know ffmpeg can work with, then execute that exact same command on your system, but substitute the filename for (self.mp3.to_file.path. So, for example:

[you@yourbox] $ ffmpeg -i original_file.wav -vn -ar 44100 -ac 2 -ab 16 -f mp3 new_mp3.mp3

Where: - original_file.wav - test original file for ffmpeg to convert - new_mp3.mp3 - what ffmpeg should create as a result of said conversion

Also, check permissions on your various directories. Make sure that whatever user is running Ruby (i.e. is this running behind Apache with Phusion?) has write and execute permissions on whatever directory you're writing the files to.