Recherche avancée

Sur d’autres sites (10504)

• Nginx RTMP/HLS - stream to ffmpeg and output HLS

  20 novembre 2018, par kanazaca

  At this point my solution is working but only as RTMP, i can watch perfectly my stream using the URL :

  rtmp://X.X.X.X:1935/show/name

  But the problem is that my LG Smart Tv which uses WebOS don’t support RTMP and i would really like to play my stream there. The only solution that i can see right now is to use HLS. With HLS all works fine too, but i need to execute my ffmpeg command before open the HLS stream in TV, otherwise it will not create the files necessary to display the stream on my TV.

  So my goal is to serve a stream as HLS without having to trigger the RTMP endpoint or the FFMPEG manually.

  I’m really struggling with this, waste 3 days trying to make it work :(

  http 
  
  {
  
  location /hls 
  
  {
  
      # Disable cache
  
      add_header Cache-Control no-cache;
  
  
  
      # CORS setup
  
      add_header 'Access-Control-Allow-Origin' '*' always;
  
      add_header 'Access-Control-Expose-Headers' 'Content-Length';
  
  
  
      # allow CORS preflight requests
  
      if ($request_method = 'OPTIONS') {
  
          add_header 'Access-Control-Allow-Origin' '*';
  
          add_header 'Access-Control-Max-Age' 1728000;
  
          add_header 'Content-Type' 'text/plain charset=UTF-8';
  
          add_header 'Content-Length' 0;
  
          return 204;
  
      }
  
  
  
      types {
  
          application/vnd.apple.mpegurl m3u8;
  
          video/mp2t ts;
  
      }
  
  
  
      root /mnt/;
  
      }
  
  }
  
  
  
  }
  
  rtmp {
  
  server {
  
      listen 1935;
  
  
  
      chunk_size 4000;
  
      buflen 5s;
  
  
  
      application show {
  
          live on;
  
  
  
      exec_pull ffmpeg -re -i http://stream-coming.com/$name.ts -c:v libx264 -preset faster -pix_fmt yuv420p -c:a aac -f flv rtmp://localhost/show/$name;
  
  
  
          # Turn on HLS
  
          hls on;
  
          hls_path /mnt/hls/;
  
          hls_fragment 3;
  
          hls_playlist_length 60;
  
          # disable consuming the stream from nginx as rtmp
  
          deny play all;
  
      }
  
  }

  }

  Thanks for your time ;)

• Adding a text overlay with constant size to a video with varying resolutions using ffmpeg

  22 décembre 2020, par BetaLixT

  I have a video with different resolutions at different points of the video and need to add a text overlay to it. I'm new with ffmpeg, the following is one of the commands I've tried

  


  ffmpeg -i input.mp4 -vf "drawtext=text='Hello World'" -c:a copy output.mp4


  


  But the output has blurry text with it resizing every few seconds (I'm guessing because of the various resolutions in the video) and some parts of the video have their aspect ratios altered.

  


  Information on input file

  


  The input.mp4 video is generated from some .h264 raw data converted to mp4 and some blank mp4 generated that are all concatenated together, following are the commands

  


  h264 to mp4 :

  


  ffmpeg a.h264 -c copy a.mp4


  


  blank mp4

  


  ffmpeg -t 5 -f lavfi -i color=c=black:s=200x200 -c:v libx264 -tune stillimage -pix_fmt yuv420p -video_track_timescale 1200000 b.mp4


  


  Concat :

  


  ffmpeg -safe 0 -f concat -i list.txt -s 720x960 -c copy input.mp4


  


  I'd be thankful for any advice on how I could achieve this

  


• How do I reverse a video in ffmpeg ?

  19 avril 2023, par Will Beeson

  - Full Error :

  


  Stream specifier 's1:v' in filtergraph description [0]split=2:outputs=2[s0][s1] ;[s1:v]reverse[s2] ;[s0][s2]concat=a=0:n=2:v=1[s3] matches no streams.

  


  - Formatted Error

  


  

  • [0]split=2:outputs=2[s0][s1] ;

  


  • [s1:v]reverse[s2] ;

  


  • [s0][s2]concat=a=0:n=2:v=1[s3]

  


  


  - Code :

  


  instances = (
    ffmpeg
    .input(self.video_file)
    .filter_multi_output(filter_name="split", outputs=2)
)
ordered_edits = []
for i in range(2):
    if i%2 == 0:
        ordered_edits.append(
            instances[i]
        )
    else:
        ordered_edits.append(
            instances[i].video.filter(filter_name="reverse")
        )
(
    ffmpeg
    .concat(*ordered_edits, a=0, v=1)
    .output('done/output.mp4')
    .run(overwrite_output=True))


  


  Looking at the error code, it seems like s1:v should be a valid reference. The only thing I can think of is that there is an issue saving an exclusive video input into a nonspecified output. The files don't actually have any audio, I just want the video.

  


  I'm lost, please help ffmpeg experts of the world !