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• How to send stream from FFMPEG to a HTTP server ?

  18 novembre 2022, par SOSparachuter1

  I am making an Android app that creates a stream from a vulkan application, and also needs to host an http server.

  


  I cannot rely on http servers like Nginx or Ngrok, which is where my issue lies.

  


  Simple android-based HTTP servers (like nanohttpd) out there do not support the stream listening features that Nginx does.

  


  How can I get a local m3u8 playlist (output by ffmpeg) over to a web server without relying on Nginx ?

  


• Does simple rescaling from 1080p to frame height of 720 lead to 720p ?

  12 août 2015, par nburk

  I want to convert a 1080p to 720p and also lower resolutions eventually.

  I have been using ffmpeg for all my video processing activities so far, and would simply approach this task using the following command :

  ffmpeg -i tos.mov -vf scale=-1:720 tos_0x720.mov

  I understand that this will rescale my video to a new frame size having 720 pixels set as a fixed height and the width dynamically calculated.

  What I am not sure about are the implications regarding the quality factors of the video when using ffmpeg this way.

  1. Is it valid to assume that running this command will output a perfect HD 720p quality video ?
  2. What would be a benefit of using dedicated video conversion software to accomplish my goal compared to running the above command ?

• ffmpeg : Could not negotiate a supported cipher suite

  9 novembre 2016, par bot1131357

  I am trying to securely rtsp stream between two consoles on my computer.

  On the listening console I have :

  ffplay -rtsp_flags listen rtsps://127.0.0.1:8554/live.sdp?cert=domain.crt"&"key=domain.key

  On the streaming console I have :

  ffmpeg -f lavfi -i smptebars -c:v libvpx -f rtsp -rtsp_transport tcp rtsps://127.0.0.1:8554/live.sdp

  When I run ffmpeg on the second console, ffplay (1st console) returns with the following message :

  [tls @ 0x7f3eb8005be0] error:1408A0C1:SSL routines:ssl3_get_client_hello:no shared cipher
  
  [rtsp @ 0x7f3eb80008c0] Unable to open RTSP for listening
  
  rtsps://127.0.0.1:8554/live.sdp?cert=domain.crt&key=domain.key: Input/output error

  The second console shows this :

  Input #0, lavfi, from 'smptebars':
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
  
  [libvpx @ 0x120f8c0] v1.6.0-322-gc325fb7
  
  [tls @ 0x12340e0] Unable to negotiate TLS/SSL session
  
  Could not write header for output file #0 (incorrect codec parameters ?): Input/output errorStream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> vp8 (libvpx))
  
      Last message repeated 1 times

  I get the feeling that the command syntax that I use is incorrect, but I was unable to find much resources on this on the internet.
  Can someone point me in the right direction ?

  ---

  My build (Ubuntu 14.04 LTS)

  ffmpeg version N-82143-gbf14393 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --prefix=/home/reccsi/Dev/build-x64/ffmpeg-x64/ --target-os=linux --pkg-config-flags=--static --enable-shared --enable-libvpx --enable-libvorbis --enable-openssl --enable-pic --enable-debug