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Sur d’autres sites (10750)

  • ffmpeg : Missing subtitles on iPod

    7 septembre 2016, par forthrin

    I generating a playable video on a 3rd generation iPod Nano using the following command line, but I’m having certain challenges related to subtitles, stability and metadata.

    ffmpeg -y -i in.mkv -i in.srt -profile:v baseline -level 3 -refs 6 -ar 44100 -ac 2 -ab 128k
    
-vf "scale=640:-1,pad=iw:480:0:(oh-ih)/2" -map 0:0 -map 0:1 -map 1:0 -map_metadata -1
    
-movflags +faststart -scodec mov_text -metadata:s:s:0 language=eng out.mp4

    1. Subtitles won’t show. I tried both iPod settings "Subtitles On" and "Captions On". iPod software is latest 1.1.3. Subtitles show with OS X QuickTime after I change from "Auto" to "English" in the subtitle menu. Is there an ffmpeg flag to make subtitles display on the iPod ?

    2. The video player exits after 11-12 minutes for many of the converted videos. Restricting the bitrate -b:v 600k -bufsize 600k did not help. Any advice how to circumvent this ?

    3. Lastly, how can I make the video show under the "TV show" menu on the iPod ? Couldn’t find any help searching for "ffmpeg metadata tv". Or is this an internal iTunes feature ?

  • Word-by-word display of subtitles in FFMPEG ?

    10 mars 2020, par ThaDon

    I am trying to burn subtitles into a video such that they appear in a word-by-word fashion instead of all at once.

    What I mean by this is, a word will appear, then another word will appear next to it, and so on. Eventually the line will clear, then repeat.

    Example :

    enter image description here

    I thought I could create an Advanced Substation Alpha file where subtitles share the same end-time but differing start times, however FFMPEG doesn’t seem to cope very well when rendering the file :

    [Script Info]
    
; Script generated by FFmpeg/Lavc57.107.100
    
ScriptType: v4.00+
    
PlayResX: 384
    
PlayResY: 288
    

    
[V4+ Styles]
    
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
    
Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10,10,10,0
    

    
[Events]
    
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
    
Dialogue: 0,0:00:00.00,0:00:03.46,Default,,0,0,0,,I'm
    
Dialogue: 0,0:00:01.00,0:00:03.46,Default,,0,0,0,,a
    
Dialogue: 0,0:00:01.50,0:00:03.46,Default,,0,0,0,,subtitle

    The idea being that I'm would appear, then 1 second later a would show up next to it followed by subtitle a half second later

  • FFmpeg with Swift 3 in iOS

    5 octobre 2017, par Rahul Patil

    I am working on one application where I want to show video stream from ip enabled camera. There is one URL where that video I want to show in app.
    I am new for this task and I don’t know anything about what to do.

    After trying and searching I found a solution with Objective-C, having a sample project which the ffmpeg lib is configured.

    If anyone have ideas about how to work with ffmpeg using Swift or anyone have sample code then please share with me.

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