Support picture-based subtitles? Crash with command "-i 1.mp4 -vf subtitles=1.srt 2.mp4"

[tanersener]

Support picture-based subtitles? Crash with command "-i 1.mp4 -vf subtitles=1.srt 2.mp4"

[tanersener]

I guess picture-based subtitles were not tested. Can you provide a sample .srt file so I can test it?

[FengDeng]

Hi, @tanersener
Here is demo,https://github.com/FengDeng/SOSubtitle/tree/master/SOSubtitle
Thanks for your help.

[tanersener]

Hi,
I made some tests with your project. Burning picture-based subtitles worked on IOS simulator but crashed on a real device with arm64 architecture. Is this the issue you encountered?

[FengDeng]

Yes,It crashed on real devices.

[FengDeng]

By the way,memory leaks...

[shoyu666]

add subtitle by "-vf "
mp4 file size 22M
android memory Increased to 100M+

[tanersener]

By the way,memory leaks...

I see them too, unfortunately they come from ffmpeg libraries, no quick fix atm. Tried many things about them but modifying ffmpeg source is needed. Good thing is most of them are small in size, around a few KB. But some leaks in external libraries x265 and libvidstab are huge and wastes MBs. Will monitor them in new releases.

Your issue with subtitles is a bug. I'm working on it but can not give a time frame about the fix.

[tanersener]

Hi, a patch is released about this issue; v2.1.1 is published in cocoapods.

[FengDeng]

Thanks your great project.I changed my way of implementation.Not use ffmpeg.
And I test 2.1.1 with my demo,picture-based subtitle is not work.

[tanersener]

OK mate; it's your decision to use FFmpeg or not. I just want to make sure everything is working properly.

There is an error on your project (https://github.com/FengDeng/SOSubtitle/tree/master/SOSubtitle). By applying the following two steps it is possible to successfully burn picture-based subtitles.

1. Add 方正大黑_GBK.ttf font to your project.

2. Update these two statements inside AppDelegate.swift

if let resourcePath = Bundle.main.resourcePath {
    MobileFFmpegConfig.setFontDirectory("\(resourcePath)", with: nil)
}

let r = MobileFFmpeg.execute("-i \(input) -vf subtitles=\(ass):force_style='FontName=方正大黑_GBK' \(output)")

Generated video will include subtitles.

[FengDeng]

@tanersener
cool.Thanks very much.Sorry to trouble you.

[tanersener]

no trouble mate, anytime