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  • How to convert mp4 to HLS and add subtitles to master playlist with ffmpeg

    26 septembre 2023, par light01

    I'm trying to use ffmpeg to convert an mp4 file to HLS, add subtitles, and have them in the master playlist.

    



    I managed to get it to create index_vtt.m3u8 files that contain the subtitles, but it doesn't want to add the stream to the master playlist.
I'm new to this so I don't fully understand how the whole ffmpeg works (I'm mainly just trying out bunch of resources I found on the net)

    



    I'm using the following command :

    



    ../ffmpeg-4.2.1/ffmpeg -i ../input.mp4 -i ../subtitile.vtt -c:s webvtt -profile:v baseline -level 21 -s 1280x720 -start_number 0 -hls_playlist_type vod -hls_time 10 -hls_list_size 3 -f hls -master_pl_name master.m3u8 index.m3u8`


    



    It generates master.m3u8

    



    #EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=140800,RESOLUTION=1280x720,CODECS="avc1.42c015,mp4a.40.2"
index.m3u8


    



    I can play it in vlc, but it doesn't recognize any subtitles.
Then I modify the master.m3u8 so it looks like this :

    



    #EXTM3U
#EXT-X-VERSION:6

#EXT-X-MEDIA:TYPE=SUBTITLES,URI="index_vtt.m3u8",GROUP-ID="default-text-group",LANGUAGE="hr",NAME="Croatian",AUTOSELECT=YES

#EXT-X-STREAM-INF:BANDWIDTH=140800,RESOLUTION=1280x720,CODECS="avc1.42c01e,mp4a.40.2",SUBTITLES="default-text-group"
index.m3u8


    



    And everything is fine. How can I tell ffmpeg to do this for me ?

    


  • Merge pull request #55 from dinks/master

    28 novembre 2014, par scottschiller
    Merge pull request #55 from dinks/master

    Always default to http for IE when accessing cab file

  • Merge pull request #51 from ChiperSoft/master

    14 septembre 2014, par scottschiller
    Merge pull request #51 from ChiperSoft/master

    Add a package.json file to allow npm installs.

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