[Cin] BD subtitles <> dvd subtitles

[Andrew Randrianasulu]

On Friday, December 10, 2021, Andrea paz <gamberucci.andrea at gmail.com>
wrote:

> Indeed the subtitles section is lacking; but I don't have the
> knowledge to improve it. Could you (Andrew, Terje or whoever uses
> subtitles) write the section in more detail even with step-by-step
> guides and references to external programs (and tsmuxer and mp4box)?
> Then Phyllis and I will take it to Latex. You can write as much as you
> like, with no length limit.
>

quck test with ffmpeg - i in. srt out. something showed

srt converts to .ass or .vtt, but not to dvd subtitles...

Unknown encoder 'microdvd'
$ ffmpeg -i 1-Subttl_1.srt -c:s dvdsub 1.mkv
ffmpeg version 4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
  built with Android (7714059, based on r416183c1) clang version 12.0.8 (
https://android.googlesource.com/toolchain/llvm-project
c935d99d7cf2016289302412d708641d52d2f7ee)
  configuration: --arch=armeabi-v7a --as=arm-linux-androideabi-clang
--cc=arm-linux-androideabi-clang --cxx=arm-linux-androideabi-clang++
--nm=llvm-nm
--pkg-config=/home/builder/.termux-build/_cache/android-r23b-api-24-v1/bin/pkg-config
--strip=llvm-strip --cross-prefix=arm-linux-androideabi- --disable-indevs
--disable-outdevs --enable-indev=lavfi --disable-static --disable-symver
--enable-cross-compile --enable-gnutls --enable-gpl --enable-libaom
--enable-libass --enable-libdav1d --enable-libmp3lame --enable-libfreetype
--enable-libvorbis --enable-libopus --enable-librav1e --enable-libsoxr
--enable-libx264 --enable-libx265 --enable-libxvid --enable-libvidstab
--enable-libvpx --enable-libwebp --enable-libxml2 --enable-shared
--prefix=/data/data/com.termux/files/usr --target-os=android
--extra-libs=-landroid-glob --enable-neon
  libavutil 56. 70.100 / 56. 70.100
  libavcodec 58.134.100 / 58.134.100
  libavformat 58. 76.100 / 58. 76.100
  libavdevice 58. 13.100 / 58. 13.100
  libavfilter 7.110.100 / 7.110.100
  libswscale 5. 9.100 / 5. 9.100
  libswresample 3. 9.100 / 3. 9.100
  libpostproc 55. 9.100 / 55. 9.100
Input #0, srt, from '1-Subttl_1.srt':
  Duration: N/A, bitrate: N/A
  Stream #0:0: Subtitle: subrip
Error initializing output stream 0:0 -- Subtitle encoding currently only
possible from text to text or bitmap to bitmap
Stream mapping:
  Stream #0:0 -> #0:0 (subrip (srt) -> dvd_subtitle (dvdsub))
    Last message repeated 1 times

so no dice here....
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