Add other subtitle support [ASS]

[Former user]

Add support for others subtitle

[Petr Nejedly]

what device it this for?

[Former user]

Samsung TV, basically transcode with other subtitule support like ASS

[Petr Nejedly]

baking subtitles into video stream not supported by ffmpeg, will have to write some code for converting ASS into SRT

[Petr Nejedly]

related to #16

[Illico]

http://www.ffmpeg.org/libavfilter.html#ass Draw ASS (Advanced Substation Alpha) subtitles on top of input video using the libass library.

To enable compilation of this filter you need to configure FFmpeg with --enable-libass. This filter accepts in input the name of the ass file to render. For example, to render the file ‘sub.ass’ on top of the input video, use the command: ass=sub.ass

Not tested

[Former user]

Here is some code for converting SSA -> SRT and SUB -> SRT.

It works in memory but may be written to a new srt file.

[Illico]

Would it be the beginning of a new major feature?

But I did not have tested the libass filter.

[Former user]

libass filter and subtitles conversion could be complementary features.

[Illico]

Just try the libass and result seems good.

Downloaded Sintel Movie : http://ftp.nluug.nl/pub/graphics/blender/demo/movies/Sintel.2010.720p.mkv

Downloaded Srt file : http://durian.blender.org/wp-content/content/subtitles/sintel_en.srt

[Illico]

With Sintel mkv, you can also extract srt and transcode to ass then remux video and sub:

ffmpeg.exe -i Sintel.2010.720p.mkv -y -map 0:5 -scodec ass Sintelfr.ass

ffmpeg.exe -i Sintel.2010.720p.mkv -q:a 0 -q:v 0 -vf "ass=Sintelfr.ass" outfrremux.avi

[Illico]

From an external srt file: sintel_fr.srt (first line in srt should be removed)

ffmpeg.exe -i sintel_fr.srt -y -scodec ass sintel_fr_out.ass

ffmpeg.exe -i Sintel.2010.720p.mkv -q:a 0 -q:v 0 -vf "ass=sintel_fr_out.ass" OUT.avi

[Petr Nejedly]

they now introduced "subtitles" filter, which will do the same as ass, but you can give it srt file, instead of ass - so the first step for external subs is not needed

https://lists.ffmpeg.org/pipermail/ffmpeg-devel/2012-November/134900.html

[Illico]

You are talking about this avfilter ? I will try it...

http://ffmpeg.org/ffmpeg.html#subtitles-1

For libass on windows I followed this forum :

http://ffmpeg.zeranoe.com/forum/viewtopic.php?f=10&t=318&sid=86f22a2b7c130f92b34a4db2a2780c72&start=20#p2463

[Former user]

Hello, I got a Samsung E series TV that doesn't support ASS subtitle format. When trying to Watch .MKV with embedded ASS nothing shows up using Serviio. This is why we need on-the-fly ASS to SRT Convert done by Serviio for transcode.

Best Luck for coding it.

[Petr Nejedly]

It's already in 1.2 - read the docs