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• Map streams in ffmpeg based on title (to remove language variant)

  16 octobre 2024, par MappaM

  I have a few video files with English audio track and French audio track, because the family wants French and I prefer VO. With ffmpeg I can easily filter all tracks to keep eng and fre, the problem is there are multiple french dialects, one of them being Candian (VFQ).

  


  Therefore, with the following input streams :

  


    Stream #0:1(fre): Audio: eac3, 48000 Hz, 5.1(side), fltp, 768 kb/s (default)
    Metadata:
      title           : E-AC3 VFF
  Stream #0:2(fre): Subtitle: subrip (default) (forced)
    Metadata:
      title           : FORCED VFF
  Stream #0:3(fre): Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
    Metadata:
      title           : AC3 VFQ
  Stream #0:4(fre): Subtitle: subrip
    Metadata:
      title           : FORCED VFQ
  Stream #0:5(eng): Audio: eac3, 48000 Hz, 5.1(side), fltp, 768 kb/s
    Metadata:
      title           : E-AC3 VO


  


  The command -map 0:v: -map 0:m:language:eng -map 0:m:language:fre does not filter out anything, and I keep both audio which is wasteful. The only metadata that could be used to filter seems to be the title.

  


• Can not found valid font in ffmpeg android

  8 décembre 2022, par HaryD5

  I want to add text over video using ffmpeg. But it gives me error of Cannot find a valid font.

  


  I used this command

  


  ffmpeg -y -ss 0 -i /data/user/0/com.example.videoeditor/cache/LMS_1670500883503.mp4 -filter_complex drawtext="fontfile=/usr/share/fonts/truetype/freefont/FreeSans.ttf:text='Stack Overflow':fontcolor=white:fontsize=24:box=1:boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2" -t 7 -movflags faststart -strict experimental -vcodec mpeg4 -b:v 2097152 -b:a 48000 -ac 2 -ar 22050 /storage/emulated/0/Download/LMS_1670500883824.mp4


  


  but it gives me error

  


   Cannot find a valid font for the family Sans
Error initializing filter 'drawtext'
with args 'fontfile=/usr/share/fonts/truetype/freefont/FreeSans.ttf:text=Stack Overflow:fontcolor=white:fontsize=24:box=1:boxcolor=black@0.5:boxborderw=5:x=(w-text_w)/2:y=(h-text_h)/2'


  


  I'm using ubuntu OS.
And also is there any way to get font file from android studio assets folder ?

  


  Thanks in Advance !!

  


• I need assistance of making a automated script for ffmpeg [closed]

  18 décembre 2024, par user2614404

  Currently i use this script that GPT generated :

  


  ffmpeg -c:v av1_qsv -b:v 0 -global_quality 20 -preset veryslow -look_ahead 64 -c:a copy -c:s copy G:\1ARC-movies\A-View-to-a-kill.mkv -i Y:\media\Movies\A_VIEW_TO_A_KILL_t05.mkv

  


  But sadly GPT being gpt, it hallucinates answers, and none of it's deeper automation code scripts were working when it made the scripts for a .ps1 script file.

  


  And as i find most of the docs quite overwhelming, i need help to simplify what i need. As i learn best when i get explained what i currently try to do, and not every variable ffmpeg can do.

  


  what i want the script to do is :

  


  1 : convert movies with AV1_QSV with "veryslow", as that's apparently from what i've read up being the best it can do

  


  2 : Global quality as close to 50 as possible (smaller, the better), as 20-6 gave the same range of percentage of 97% VMAF score, 22 gave 95%, so 20 is the largest number i can go, as VMAF via NMKODER reported any higher number was sub 97%.

  


  3 : Give it a main folder for movies and shows to scan, and convert all the media in there to their respective subfolders to a designated output folder.

  


  2 : Automatic crop detection, as some crops it to a 21:9 ratio, others has very small letterboxes. As GPT's code for that attempt for some reason used cpu instead of arc's quicksync.

  


  As this will be ran from powershell, and it's to replace my plex library, by transcoding all movies and shows, starting with the least watched ones/shows that my family has seen, as then those will be unavailable for them until unraid 7 is out of beta to read intel arc for av1.