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• 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

  


• Combine audio with ffmpeg breaks video

  21 décembre 2015, par Harry Walter

  I’m attempting to combine and audio file (mp3) with a video created with ffmpeg. The video is created from several smaller clips using :

  ffmpeg -y -f concat -auto_convert 1 -i videos.txt -c copy -an -sn video.mp4

  videos.txt contains a list of videos to combine. This video is created correctly and plays fine. Next I am trying to add an audio track to the video. I’ve checked and the audio file plays correctly however when I add it using the command below the mp4 produced is corrupt and no longer valid for playback :

  ffmpeg -y -i video.mp4 audio.aac final.mp4

  Any ideas, I’m new to using ffmpeg and not sure what half the output means and what is relevant but I don’t see anything that looks like errors.

• PowerShell script ffmpeg

  30 mars 2017, par Karma Elite

  Being the good Windows systems admin that I am, I’m finally getting around to learning PowerShell. With that being said, I have no idea what I’m doing (surprise, surprise).

  I thought that it would be a good learning experience for me to play around with PowerShell at home, far away from my production environment. Recently, I’ve begun using FFMPEG to convert all of my .mkv files to .mp4 so I could have better playback support to my PlayStation 3 via Plex, and thought that this would be a good learning experience.

  The command I’ve been running is as follows :

  ffmpeg -i OldVideoName.mkv -vcodec copy -acodec ac3 OldVideoName.mp4

  What I want is have a PowerShell script that will run once, scanning a folder and all sub-folders for .mkv files (Get-ChildItem ".*.mkv"), transcode them to .mp4 via the above command, and place them in the same location as the .mkv with the same naming scheme.

  Example of running the script with D :\Videos as the target directory :

  D :\Videos\home_dvr\movies\video1.mkv —> D :\Videos\home_dvr\video1.mp4
  D :\Videos\home_dvr\tv\video2.mkv —> D :\Videos\home_dvr\tv\video2.mp4

  As you can guess, I can’t figure it out for the life of me. Here’s the latest attempt before giving up.

      $oldvid = Get-ChildItem .\*.mkv -Recurse
  
      $newvid = $oldvid.Name.split(‘.’)[0]; ForEach-Object {
  
              .\ffmpeg.exe -i $oldvid -y -vcodec copy -acodec ac3 $newvid".mp4”
  
      }

  Any help would be appreciated !