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  1. @Zixue
    Please post the video link here, so i can take a look.
    Quote Quote  
  2. >> Frame resize -> retain source DAR, works well.
    How about the idea of ​​applying it to "crop detection" too?
    > This is not a good idea.
    Think for example of a 2.39:1 movie that was letterboxed and encoded as 16:9.

    Right! 1920x800 will be cut to 1424x800. 25% content cut away. I would'nt do that.

    But I've got some DVDs with very old 4:3 movies (512x384 - 550X412) where the borders are unclean and flickering because they are professionally filmed from the screen.
    Between 4 and 20 pixel need to be cut all around.
    With retain source DAR, I do not need to calculate the cuts any longer to keep the aspect ratio as the app takes care.


    But that's not important.

    ---

    NEW: When a mp4 has no subtitle and I add a srt, the default and forced flag does not work with VLC for mp4 but for mkv file extension!

    mp4 details from MediaInfo:

    Text
    ID : 3
    Format : Timed Text
    Muxing mode : sbtl
    Codec ID : tx3g
    Duration : 34 min 34 s
    Bit rate mode : Variable
    Bit rate : 4 b/s
    Frame rate : 0.036 FPS
    Stream size : 962 Bytes (0%)
    Title : Forced
    Default : Yes
    Forced : Yes / No
    Alternate group : 3
    Count of events : 37
    Quote Quote  
  3. Originally Posted by Findu View Post
    NEW: When a mp4 has no subtitle and I add a srt, the default and forced flag does not work with VLC for mp4 but for mkv file extension!
    Tested, i confirm the problem, but this must be a ffmpeg bug, because the disposition is correctly written.
    Quote Quote  
  4. >> NEW: When a mp4 has no subtitle and I add a srt, the default and forced flag does not work with VLC for mp4 but for mkv file extension!
    > Tested, i confirm the problem, but this must be a ffmpeg bug, because the disposition is correctly written.

    Thanks for the hint. Your right!

    But GPAC-2.5-DEV-rev854-g83429541-master support forced subtitles for mp4 and works also very quick.


    Interesting!

    When I load this working GPAC mp4 in your app, forced is not set. I can set it or not, after multiplexing it remains working forced.

    GPAC mp4 details from MediaInfo:

    Text
    ID : 3
    Format : Timed Text
    Codec ID : tx3g
    Duration : 34 min 34 s
    Bit rate mode : Variable
    Bit rate : 4 b/s
    Frame rate : 0.036 FPS
    Stream size : 962 Bytes (0%)
    Title : srt#trackID=1:lang=eng:txtflags+=0xC0000000#name=@ GPAC2.5-DEV-rev854-g83429541-master
    Language : English
    Forced : Yes
    Encoded date : 2025-02-10 23:07:59 UTC
    Tagged date : 2025-02-10 23:07:59 UTC
    Count of events : 37
    Quote Quote  



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