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• ffmpeg encoding outputs a file with incorrect metadata

  20 juillet 2013, par user2554615

  I use ffmpeg to convert a flv file to an mp3 file like so in bash :

  ffmpeg -i path/to/file.flv path/to/output.mp3

  say the flv is 5 minutes long, the output file is supposedly say, 3 minutes long. however when played back it will reach the 3 minute mark and keep playing (as it should) the full length. when i try to skip to a portion of the song it only skips by fractions of the time it should, take for example if the video is labeled as 3 minutes long and i skip to the end, it will actually be playing the area that is about 30 seconds in. why is it doing this and how do i fix it ? is there any other utility that i can use that will effectively convert .flv and .mp4 files to .mp3 or .wav in a loss-less fashion while maintaining the correct metadata, preferably for windows ? perhaps an API i can use in java or c++ ?

  PS : i ask here because it relates to a command line utility and i assume that the the solution will relate to the options used in the command.

  PPS : i am using the ffmpeg that comes with puppy linux (precise) 5.4

• FFMPEG add/remove input on the fly

  10 août 2022, par Thomas Halvick

  I'm trying to merge audio on the fly for my bot with discord JS.
I found a way to do it, but it's not perfect.

  


  My solution

  


  

  • Create a FFmpeg process with each input into stream and process them at same speed while playing

  


  • And merge each stream in one with another FFmpeg process

  


  • When adding a new audio, I create a new process for this one and destroy the merge process and recreate one

  


  


  Issues

  


  

  1. It's take seconds before playing

  


  2. When adding a new song, my bot stop playing while the merge process start

  


  


  There is a way to do it with one FFmpeg process to add and remove input stream ? FFmpeg is the best way to do that ?

  


• How to make FFmpeg automatically inject mp3 audio tracks in the single cycled muted video ?

  5 décembre 2020, par Grrzly

  everybody here ! So basically this is what I want to achieve :

  


  I have a muted video about 3 minutes long.
I have a list of audio tracks in mp3 format (40 songs in a folder with duration 2 to 6 mins each one)

  


  I want this video to play cycled automatically taking songs from playlist and injecting them to the video one by one. Every time a song finishes the next one from the list should start playing at the moment. Video continues playing and doesn't care duration of tracks.

  


  I consider it as the first step on the way to broadcast radio with a video background on youtube in 24/7 mode with ability to put additional tracks to playlist without need to stop translation.

  


  My problem is that I'm new in FFmpeg and I would appreciate any suggestions regarding which FFMpeg topic to start investigate with in order to achieve my goal