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• avfilter/vf_convolution : add x86 SIMD for filter_3x3()

  27 juin 2019, par Ruiling Song

  avfilter/vf_convolution : add x86 SIMD for filter_3x3()
  Tested using a simple command (apply edge enhance) :
  
  ./ffmpeg_g -i /Downloads/bbb_sunflower_1080p_30fps_normal.mp4 \
  
   -vf convolution="0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:0 0 0 -1 1 0 0 0 0:5:1:1:1:0:128:128:128" \
  
   -an -vframes 1000 -f null /dev/null
  The fps increase from 151 to 270 on my local machine.
  Signed-off-by : Ruiling Song <ruiling.song@intel.com>
  

  • [DH] libavfilter/convolution.h
  • [DH] libavfilter/vf_convolution.c
  • [DH] libavfilter/x86/Makefile
  • [DH] libavfilter/x86/vf_convolution.asm
  • [DH] libavfilter/x86/vf_convolution_init.c

• Bot isn't playing music [closed]

  15 mai 2020, par DevTeddy

  My bot can join, but it isn't playing any music ! The code is written is Javascript, and I am using Discord.js , Node.js and FFmpeg. The prefix and token are in a seperate JSON file. There are no errors in the Console, though. Also, it says the "added song to queue" message twice, for some reason. I have already tried using VS Code's debugger and checked it for errors. Please help me !

  



  My code is at : https://github.com/Dev-Ted/ForestBot

  



  Thanks !

  


• ffmpeg extract first subtitle for given language or fix mismapped tracks

  11 mars 2023, par iarwain8a

  I'm developing a server to encode any given video and I need to extract its subtitles.

  


  I've tried something like this which worked :

  


  ffmpeg -i pipe:0 -map 0:s:1 -c:s webvtt -f segment -segment_list_flags +live -segment_time 60 -segment_list subs_eng.m3u8 -segment_format webvtt subs_eng.vtt -loglevel debug


  


  This encodes from srt, into webvtt, the second track which happens to be in this video an English subtitle. But very quickly I ran into a problem in which the tracks mappings are not numbered correctly for this video, for example, the (eng) track should be "-map 0:s:2", but it's "-map 0:s:1" as I've said before, and the (bul) track, which should be "-map 0:s:4" is actually "-map 0:s:2".

  


  Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn (default)
  Stream #0:1(eng): Audio: eac3, 48000 Hz, 5.1(side), fltp, 768 kb/s (default)
  Stream #0:2(eng): Subtitle: subrip
    Metadata:
      title           : English
  Stream #0:3(eng): Subtitle: subrip
    Metadata:
      title           : English [SDH]
  Stream #0:4(bul): Subtitle: subrip
    Metadata:
      title           : Bulgarian (Bulgaria)


  


  Given said problem I tried something like this :

  


  ffmpeg -i pipe:0 -map 0:s:m:language:eng -c:s webvtt -f segment -segment_list_flags +live -segment_time 60 -segment_list subs_eng.m3u8 -segment_format webvtt subs_eng.vtt -loglevel debug


  


  Which didn't work because I can't or don't know how, to actually select the first result of this "-map 0:s:m:language:eng" if there is more than 1 "eng" sub track. Is there a way to do this ?
Or the alternative should be : Is there a reason why the metadata of this file is mismapped ? If so is there a way to detect it, to then do something about it ? or have it fixed ?