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• i want to control on bitrate for 720p

  10 décembre 2020, par shadymelad

  i want to control on bitrate for my files
i use this code

  


  for %i in (Fargo.*.mkv) do echo %~ni.mkv && ffmpeg -i %~ni.mkv -i shady.png -filter_complex "[0:v][1:v]overlay=main_w-overlay_w-10:10,subtitles=%~ni.srt" -codec:a copy -s hd720 -b:v 800k -maxrate 800k -bufsize 800k -preset medium %~ni.new.mp4


  


  by this code always the bitrate come to high like average 2000-2500 the finiel files come to high for watching online for ex 1 EP for series come like 1 Giga
i want to control it to get out average 1000-1200 to make the size come not to high for watching online

  


  anyone can help me ?

  


• Convert stream to a stream on the fly with ffmpeg/avconv

  6 juillet 2014, par Apacci

  I’m trying to convert flv stream to another mp3 or ogg stream. The point is I want to use mp3/ogg stream on HTML5 page, because flv stream can’t be played with HTML5. So, I configured avserver.conf :

  Port 8090
  
  BindAddress 0.0.0.0
  
  MaxHTTPConnections 2000
  
  MaxClients 1000
  
  MaxBandwidth 1000
  
  CustomLog -
  
  
  
  <feed>
  
      File /tmp/feed1.ffm
  
      FileMaxSize 200K
  
      ACL allow 127.0.0.1
  
  </feed>
  
  
  
  <stream>
  
      Feed feed1.ffm
  
      Format ogg
  
      AudioBitRate 64
  
      AudioChannels 1
  
      AudioSampleRate 44100
  
      NoVideo
  
  </stream>
  
  
  
  <stream>
  
      ACL allow localhost
  
      ACL allow 192.168.0.0 192.168.255.255
  
  </stream>
  
  
  
  <redirect>
  
      URL http://www.libav.org/
  
  </redirect>

  the command I use :

  avconv -i http://some_stream_service?format=flv -acodec mp3 http://localhost:8090/feed1.ffm

  console output :

  avconv version 9.13-6:9.13-0ubuntu0.14.04.1+fdkaac, Copyright (c) 2000-2014 the Libav developers
  
    built on May 10 2014 17:26:31 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  [flv @ 0x126e020] max_analyze_duration reached
  
  Input #0, flv, from 'http://some_stream_service?format=flv':
  
    Metadata:
  
      encoder         : Lavf52.87.1
  
    Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
  
      Stream #0.0: Audio: aac, 44100 Hz, stereo, fltp, 31 kb/s
  
  Output #0, ffm, to 'http://localhost:8090/feed1.ffm':
  
    Metadata:
  
      encoder         : Lavf54.20.4
  
      Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, fltp
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (aac -> libmp3lame)
  
  Press ctrl-c to stop encoding
  
  size=    1080kB time=66.14 bitrate= 133.8kbits/s 

  It looks like working, but I keep getting 0 bytes on web page http://localhost:8090/test1.ogg. Does anybody have ideas what I’m doing wrong ?

• FFMPEG : Use expression calculated from timestamp to drawtext [closed]

  26 décembre 2020, par NicolasV

  Using ffmpeg and draw text, I need write on the video something like that :

  


  text=1+floor(BPM * mod(1000*t-StartCounter ;480000/BPM)/60000).

  


  I don't know if I need use PTS or t.

  


  StartCounter would be a variable in milliseconds, the text would appear at this point.

  


  BPM is an integer variable between 100 and 180.

  


  I would draw for instance with StartCounter = 3256 and BPM = 120.

  


  Any help appreciated, thanks