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• Node.js ffmpeg download M3U8 URL as MP4

  9 mai 2017, par Lars Erik Storbukås

  I’ve installed ffmpeg.js using Node.js.

  I want to be able to give an URL as an argument (where the resource located at the URL is an M3U8 file), and download it as an MP4.

  With regular command line ffmpeg (not JavaScript ported), the command would be the following :

  ffmpeg -i http://example.com/file.m3u8 -c copy out.mp4

  I’ve tried the following, but it doesn’t work.

  var ffmpeg = require("ffmpeg.js");
  
  var fs = require("fs");
  
  
  
  var result = ffmpeg({
  
    arguments: ["-i", "http://example.com/file.m3u8", "-c", "copy", "out.mp4"],
  
  });
  
  
  
  fs.writeFileSync("out.mp4", Buffer(result));

• Video conversion on different server than app server

  13 mars 2016, par yakuzafu

  I’ve got my application running on server A.

  When a user uploads a video via that application, the video should be transferred via FTP to another server B. I don’t know how to make something like this work :

  • User uploads a video (like .avi, .webm, .mkv)
  • Application puts it on the FTP server
  • FTP server converts that video to .mp4

  I’ve tried using FFmpeg on PHP, but it executes only on the server where the application is located, but I need it to run on the FTP server.

  How can I make it work like that ?

• how to fix nvidia hevc transcoding problem

  25 novembre 2019, par Dlniya Dlzar

  we are using FFmpeg for media broadcasting DVB-T2
  the structure is like that :

  [ source h264 (multicast) >> FFmpeg h265 >> scrambler ]

  we are using Nvidia GPU for transcoding

  the problem is, when we transcode to H265 there is an issue when we play the video.
  it is like cc error or maybe muxing issue, we don’t know, what we know is, the stream has lagging every few mins.
  we played the output stream by FFmpeg again

  /root/bin/ffmpeg -v error -i udp://lo@127.0.0.1:5000 -f null - 2>error.log

  we got this

  [hevc @ 0x2610b40] PPS id out of range: 0
  
      Last message repeated 35 times
  
  [hevc @ 0x2604a80] Could not find ref with POC 21

  and here is our FFmpeg command line example for transcoding

  /root/bin/ffmpeg -re -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid  -deint 2  -drop_second_field 1 -surfaces 10 -fflags discardcorrupt+genpts+nobuffer -i   "udp://227.30.40.4:1234?localaddr=192.168.2.55&overrun_nonfatal=1&&fifo_size=50000000" -map 0:p:352 -af aresample=async=1  -acodec aac -ac 1 -strict -2  -vcodec hevc_nvenc  -g 40  -b:v 2300k -minrate 2300k -maxrate 2300k -bufsize 2300k -preset hq -metadata service_provider="ISTAR MEDIA" -metadata service_name="KURDMAX" -flags cgop -sc_threshold 500  -f mpegts -muxrate 2700k  -y  "udp://227.2.2.6:1234?localaddr=192.168.2.55&fifo_buffer=50000000&overrun_nonfatal_option=1&bitrate=2700000&burst_bits=2700000&pkt_size=1316" 2> /var/log/ffmpeg/kurdmax.txt