Recherche avancée

Sur d’autres sites (10063)

• Is there a way to make time lapses with ffmpeg ? [closed]

  7 janvier 2020, par Steven Copeland

  How can you make a time-lapse with FFmpeg on ubuntu ? And I don’t mean converting a video into a time-lapse. I mean recording your laptop screen at a sped-up pace.

• VPS as video relay server using ffmpeg and ffserver ?

  15 juillet 2016, par Luke E

  I’m working on a project where I need to send a video stream from a laptop through a router I don’t have control of to an Android phone on another network I don’t have control of. The project also involves sending a stream of sensor data the opposite direction, for which I’m using a VPS and TCP hole punching quite successfully.

  So, I thought to myself, why not just stream the video from ffmpeg on my laptop to ffmpeg on the VPS, and then relay that via ffserver to my android phone ? That’s what I’ve been trying to do for a good while now, but haven’t had much luck. The stream is recognized by the server but when putting it out over ffserver I get errors. Here is my ffserver.conf :

  HTTPPort 9000
  
  HTTPBindAddress 
  
  RTSPPort 5454
  
  RTSPBindAddress 
  
  
  
  <feed>
  
  File /tmp/feed1.ffm
  
  FileMaxSize 50M
  
  </feed>
  
  
  
  <stream>
  
  Feed feed1.ffm
  
  Format rtp
  
  VideoSize 960x540
  
  VideoBufferSize 0
  
  VideoFrameRate 30
  
  NoAudio
  
  AVOptionVideo flags +global_header
  
  </stream>

  And here’s the command I’m using to take the received stream on the VPS and transmit it to ffserver :

  ./ffmpeg -protocol_whitelist file,udp,rtp -i foo.sdp  -an -c copy -f rtp rtsp://:5454/feed1.ffm

  When doing this command, I get the error "rtsp ://:5454/feed1.ffm : Protocol not found"

  Any advice ?

  I also thought about doing this with netcat and just and trying to forward all data received on the VPS at a certain port 1234 to any client connected to say port 1235, but this appears to be much more difficult than I thought.

  Thanks again for any help, and hopefully this problem is interesting to others as well.

• Bitrate with mp3 - Can I put whatever I want ? [closed]

  5 juillet 2023, par AtyKlaxas

  I'm actually on a project to re-encode a large amount of audio files

  


  all over the internet I see people encoding in 320k, 196k, 128k

  


  If there is a rule for encoding values, what is it ?
Is there a reference table of encoding levels for mp3s ?
or i pur whatever i want ? (example 120k or 280k)

  


  I've tried asking ChatGPT
I expect to get these answers

  


  There's a reference table, you can't encode anything other than this : 320k, 256k, 196k, 128k (ect ...)

  


  There is no reference table, but the rules that are not written down and accepted by everyone are : (explanation)
and this gives us a list of bitrates 320k, 256k, (...)

  


  There are no rules at all, you can encode in any bitrate you like.
benchmarks such as 320k or 256k are only indicative and reflect nothing other than an arbitrary choice