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• ffmpeg returns "method SETUP failed : 404 Not Found"

  1er juillet 2019, par Alex

  We’re using ffmpeg (build ffmpeg-20190628-098ab93-win32-static) to take a snapshot from camera RTSP streams on a Win 10 system. On some cameras, we’re getting this error :

  [rtsp @ 06813ac0] method SETUP failed: 404 Not Found
  
  rtsp://username:password@example.com: Server returned 404 Not Found

  Here’s an example command we use :

  ffmpeg -y -i rtsp://username:password@example.com -vframes 1 -pix_fmt yuvj420p 
  
    -vf select='eq(pict_type\,I)' -q:v 1 _test.jpg

  However, VLC can load the same stream (we can’t use VLC, though) from the same machine. Additionally, we’ve opened the firewall to ffmpeg (it popped up the two firewall dialogs and we allowed it through).

  We’ve found posts on the DESCRIBE error but nothing on SETUP. Any help is appreciated. Thank you.

  Update : In VLC, that RTSP stream asks for credentials twice for some reason. Wondering if that’s the cause.

• Randomly silencing part of input audio in real time

  3 septembre 2021, par Nobody

  My machine is running Ubuntu 20 LTS. I want to manipulate the input live audio in real-time. I have achieved pitch shifting using sox. The command being -

  


   sox -t pulseaudio default -t pulseaudio null pitch +1000


  


  and then routing the audio from "Monitor of Nullsink" .

  


  What I actually want to do is, silence randomized parts of the input audio, with a range. What I mean is, randomly mute 1-2s of the input audio.

  


  The final goal of this project will be to write a script that manipulates my voice and makes it seems like my network is bad.

  


  There is no restriction in method of achieving. That is we may use any language, make an extension, directly manipulate the input audio with sox, ffmpeg etc. Anything goes.

  


• What exactly is the input to the coder part of a software video codec ?

  30 juin 2022, par usrnew xnew

  I am doing a project based on video codecs and have to implement a specific type of codec(one of the H.26x types). So far in my research, I've found out that mp4 files are simply container files that can contain video data in any coded form. I wanted to know if there is a raw file type for video files like how there are for images and audio. However, I came to find out that there is no standard raw file for a video format and since mp4 is a container, it may as well contain a completely uncompressed video with frames, audio etc.

  


  So basically, if there's no specific standard raw format for a video, what kind of file would the software codec take as input while encoding ? And if it does take an mp4, how do we find out if it's really an uncompressed mp4 file or an already encoded one, i.e. which atom holds the value of encoding name ?

  


  Edit :