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• How to add srt embedded subtitles from source video, to ouput hls playlist video ?

  2 mars 2023, par iarwain8a

  I have a source video "video.mkv" that has srt embedded subtitles, and I want to encode that file into an HLS playlist that is compatible with html5 video player.

  


  So far I got this :
ffmpeg -i <path> -map 0:s:1 -c:s:1 srt -f webvtt <hlsdir>/1subs.vtt -c:a aac_mf -b:a 128k -c:v copy -hls_time 7 -hls_list_size 0 -hls_segment_filename <hlsdir>/segment%d.ts <hlsdir>/playlist.m3u8 -loglevel debug</hlsdir></hlsdir></hlsdir></path>
What this line does, is extract and encode the subtitles at the same time, leaving them in the output folder, also it encodes the audio of the video to aac, and leaves the codec of the video as is.

  


  I tried a bunch of different commands with ffmpeg to no avail, a bunch of different errors came up.
I want to, in the same line, instead of just extracting the subtitles, to also be able to add them to the hls playlist, which I couldn't do.

  


• ffmpeg sometimes only creating one segment for the entire HLS playlist regardless which -hls_time i use [closed]

  10 mai 2023, par kusti420

  can someone explain why it works as it should with certain FLACs and with other ones it only creates one m4s segment and how to fix it where it would actually create one segment every 6 seconds for any flac, as it should with "-hls_time 6".

  


  ffmpeg -i .\audio4.flac -c:a flac -vf pad="width=ceil(iw/2)*2:height=ceil(ih/2)*2" -ar 96000 -f hls -hls_time 6 -hls_playlist_type vod -strict -2 -hls_segment_type fmp4 -hls_segment_filename "idk%d.m4s" playlist.m3u8

  


  when it doesnt work then logs print out like over thousand lines of :
[hls @ 0000026653933a00] Delay between the first packet and last packet in the muxing queue is 10069334 > 10000000: forcing output

  


  i tried different versions of ffmpeg, running it on different devices and on different operating systems
was obviously expecting it to work the same for all flacs, but more than half the time it just isnt working as it should

  


• FFmpeg with m3u8 playlist : Invalid data found when processing input [closed]

  15 mai 2023, par anthnyprschka

  I get the following error when I try to open a playlist with FFmpeg :

  


  ffmpeg version 2023-03-05-git-912ac82a3c-essentials_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
  built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
  libavutil      58.  3.100 / 58.  3.100
  libavcodec     60.  6.100 / 60.  6.100
  libavformat    60.  4.100 / 60.  4.100
  libavdevice    60.  2.100 / 60.  2.100
  libavfilter     9.  4.100 /  9.  4.100
  libswscale      7.  2.100 /  7.  2.100
  libswresample   4. 11.100 /  4. 11.100
  libpostproc    57.  2.100 / 57.  2.100
playlist.m3u8: Invalid data found when processing input


  


  Command I use :

  


  ffmpeg [-allowed_extensions ALL] -i playlist.m3u8 -c copy playlist.mp4


  


  Playlist file :

  


  #EXTM3U
#EXTINF:-1,0
https://20230515.s3.eu-central-1.amazonaws.com/output0000f.mp4
#EXTINF:-1,1
https://20230515.s3.eu-central-1.amazonaws.com/output0001f.mp4
#EXTINF:-1,2
https://20230515.s3.eu-central-1.amazonaws.com/output0002f.mp4


  


  The playlist plays fine in VLC player