Recherche avancée

Sur d’autres sites (7325)

• Can I make calls to APIs such as youtube-dl and ffmpeg from a chrome-app ?

  8 janvier 2015, par ErickR

  First of all, I haven’t started the implementation of the system I’m about to describe, as I didn’t want to commit on implementing something I did not know if was possible.

  So, what I’m trying to achieve is to build a chrome-app to download the audio from certain websites (e.g. youtube and soundcloud) using youtube-dl, post process it using ffmpeg and then upload it to a cloud service via some api. The reason I want to do it via a chrome-app is because I could do all the work on the client side (no need for servers) and I’d have the ability to insert javascript into the pages using content scripts, which would make the app pretty simple to use (I could create buttons such as ’download song’ and stuff like that).

  Although I have already read the documentation explaining the NaCl Technical Overview and some of the Application Structure, I still am not sure as to whether I would be able to make these calls via some C/C++ module or if I would get denied due to security reasons.

  To summarize : considering that the user has the needed dependencies in his system (youtube-dl, python, ffmpeg and etc.), is it possible to make calls to third party APIs such as the ones described before via a chrome-app using NaCl ?

  Thank you all in advance,

• 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 ?