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• How do I configure vlc/ffplay/cheese (or other) to automatically cycle/rotate between my 3 webcams ?

  9 janvier 2019, par fivedogit

  I have 3 webcams which register in Ubuntu 18.04 as /dev/video0, /dev/video1 and /dev/video2. All three show up fine in Cheese and ffplay (but not vlc for some reason... not important for this question).

  What I want is to open a viewing window and have the image shift automatically from device 0 to device 1 to device 2 and back to 0 every X seconds without the window closing or resizing.

  I think the ultimate solution will come from creating a fake video device (let’s say /dev/video3), watching it with a program and using ffmpeg or other command-line scripts to change the stream of /dev/video3. (v4l2loopback seemed promising)

  Unfortunately, I have spent a few hours on this and gotten nowhere. Any help would be appreciated.

• x86inc : activate REP_RET automatically

  11 septembre 2013, par Loren Merritt

  x86inc : activate REP_RET automatically
  Now RET checks whether it immediately follows a branch, so the
  
  programmer dosen’t have to keep track of that condition. REP_RET
  
  is still needed manually when it’s a branch target, but that’s
  
  much rarer.
  The implementation involves lots of spurious labels, but that’s OK
  
  because we strip them.
  Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
  

  • [DH] libavutil/x86/x86inc.asm

• For ffmpeg, is there a way to "automatically" name the output using the input stream's url (.m3u8) ?

  6 août 2022, par creativeHELM

  So far, this zsh alias works quite well to capture the live stream :

  


  alias lvcp='ffmpeg -i $(pbpaste) -c copy name_of_file.ts'


  


  However, because I'm working with numerous live streams at a time, I need a way to "automatically" (or "dynamically") name the output files based on the 'camera name' in the .m3u8 url.

  


  Here's a sample of the url structure :

  


  'https://event.name_of_event.com/hls/camera-a-m12345_hd-1080/cl_v12345_12345_12345=.m3u8'


  


  I'm fine with the .ts output (or container).

  


  I just need to be able to extract the name from the .m3u8 url and automatically give it to the output name (e.g. 'name_of_file.ts').

  


  Is there a way to script that for my zsh alias ?

  


  The output name might look like this if it were automatically extracted from the .m3u8 above :

  


  'camera-a.ts'