Sur d’autres sites (8015)

• ffmpeg onvif to rtmp

  5 août 2019, par Hanchengluo

  ffmpeg -f lavfi -i anullsrc -rtsp_transport udp -i rtsp://192.168.0.3:554/onvif2 -tune zerolatency -vcodec libx264 -t 12:00:00 -pix_fmt + -c:v copy -c:a aac -strict experimental -f flv rtmp://127.0.0.1:1935/hls/playlist

  I give some problem.

  [rtsp @ 0x2abe240] Could not find codec parameters for stream 0 (Video: h264, none): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Guessed Channel Layout for Input Stream #1.1 : mono
  
  Input #1, rtsp, from 'rtsp://192.168.0.3:554/onvif1':
  
    Metadata:
  
      title           : H.264 Video, RtspServer_0.0.0.2
  
    Duration: N/A, start: 0.000000, bitrate: 64 kb/s
  
      Stream #1:0: Video: h264, none, 90k tbr, 90k tbn, 180k tbc
  
      Stream #1:1: Audio: pcm_alaw, 8000 Hz, mono, s16, 64 kb/s
  
  Codec AVOption tune (Tune the encoding to a specific scenario) specified for out put file #0 (rtmp://127.0.0.1:1935/hls/playlist) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.

• Play just audio (without launching a window)

  6 août 2017, par Paradise on E

  Is there a way to hide ffplay window on Windows ? I want to play audio files (some of them have video streem as well), but I don’t want a window to appear. Is there any way to hide window completelly ?

  I took a look at their documentationa and I didn’t find a way to do it. I also searched on the internet and didn’t find anything useful. Everyone are asking "Why in the world do you want to hide window..." and similar questions instead of actually posting an answer on how to do it.

  I believe ffplay doesn’t have native way to hide window. So, what are the most easiest alternative ? One of the alternatives would be to download ffplay source code, modify it and recompile it, but it is definitelly not an easy and quick way.

  Is there any way I can launch a process without showing window. It would be great if there is some way to achieve it when ffplay is launched from Node.js (becuase I am using Node.js’s module child_process to play audio files). So, how can I hide ffplay’s window ?

  My current code is following :

  var cp = require('child_process');
  
  var proc = cp.spawn('ffplay', [
  
    '-no_banner',
  
    '-loglevel', 'panic',
  
    playlist.splice(Math.random() * playlist.length | 0, 1)[0]
  
  ]);

  Question

  How to hide ffplay’s window ? If it is possible using ffplay native arguemnts (which I didn’t find in ther documentation) then what arguments to use ? If there is no native way, then is it possible to do it using Node.js’s module child_process ? If not, is there any other way I can hide ffplay’s window ? Again, I must note that some of files I play have video stream as well. So, is there any way to hide ffplay’s window ?

  Thanks in advance.

• ffmpeg generate m3u8 and segments manually

  1er août 2017, par Darshan Bhandari

  We are developing an application where the m3u8 file should be generated on the fly for a given mp4 video. Can someone please let us know how can we generate the mp4 file on the fly with the exact duration as the segmenter. In our case ffmpeg segmenter is created variable length segments and are of decimal size. For eg :
  #EXTM3U
  #EXT-X-VERSION:3
  #EXT-X-TARGETDURATION:7
  #EXT-X-PLAYLIST-TYPE:VOD

  #EXTINF:5.005,
  
  test.mp4.ts?start=0.000&end=5.005
  
  #EXTINF:6.715,
  
  test.mp4.ts?start=5.005&end=11.720
  
  #EXTINF:6.548,

  Can someone help us to create such m3u8 file without creating any segments. We will manually create the segments on request.

  Also when we create the segments manually there is a small stuttering (flicker) when the video goes to the next segment. When I read it online, it says it might be due to continuity counter. Can someone please help us fix that too

  Thanks.