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• Streaming libraries FFmpeg, avlib, libav etc

  14 juillet 2015, par Keithin8a

  Let me start by saying that I do not know whether this is the best stackexchange site to ask this. I am not directly asking for an opinion on which is best (although obviously it would be appreciated). I just simply need some guidance.

  I am wanting to start on a hobby project but its going to be a big old thing so I wanted to start off small. I basically need to know how to stream a video of my desktop (or any desktop) into a WPF application. Future enhancements would include doing multiple displays from different computers on a network into a WPF application.

  I have done some research and someone has given me a list of Libraries that I could use avlib, ffmpeg, gstreamer. So I started with the first two and could find ffmpeg however I found people stating that it is better to use libav. But I couldn’t find any information on avlib really, is libav a successor to avlib and that is why I can’t find it ?

  Finally all these articles that I were reading were from 2012 as well so I don’t know whether there is an even more up to date version. The last release notes for libav were from May this year so my assumption is that this is still being developed.

  Any guidance would be really useful as I am not sure where to start looking (even if it is telling me which site would be best to post this on).

• Could not write header for output file #0 - moviepy

  22 avril 2021, par U11-Forward

  I recently installed moviepy and wanted to edit videos with it.

  


  I saw that people recommend using the moviepy ffmpeg_tools for better performance.

  


  So I tried this code :

  


  moviepy.ffmpeg_tools.ffmpeg_extract_audio('before.mp4', 'audio.wav')
moviepy.ffmpeg_tools.ffmpeg_merge_video_audio('after.mp4', 'audio.wav', 'new.mp4')


  


  But it gave this error :

  


  Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument


  


  I saw that it successfully saved the audio into a separate file audio.wav, but the problem is that it doesn't merge the video with the audio.

  


  I searched and found some similar questions, like this one, but I can't figure out how to implement this into my code.

  


• How do I concatenate a specific audio recording to multiple different ones (at the beginning of each), in bulk ? [closed]

  28 septembre 2023, par catofws

  So I have an audio recording that's something like 10 seconds long, right ?

  


  That single audio recording needs to be added to the beginning of a lot of different ones, and I need to somehow be able to do it in bulk.

  


  I am talking about something very simple, literally adding that one specific 10 second long audio recording I have mentioned earlier to the beginning of the other ones, not overlapping with anything, thus extending the total duration by 10 seconds or so.

  


  Tried Audacity, works, but it's a long process that doesn't fit my purposes. If audacity can do it I know for sure that a simple script can accomplish this one very specific very simple task.

  


  I don't code.

  


  EDIT : Wanted to add that I am not expecting someone to write a whole script for me, but rather point to the right direction. I have a very basic idea of Python and I know that for my specific purpose I would need to use FFMPEG. I want someone to point me towards the right direction, what functions & libraries would I need to use to make such a script ?