ffmpeg ios代碼加字幕相關

ios上調用ffmpeg命令的配置方式可以參考：

http://blog.csdn.net/leixiaohua1020/article/details/47072673

No such filter: 'subtitles'
Error opening filters!

以及No such filter: 'ass'
Error opening filters!

應該是缺libass靜態庫，編譯ffmpeg時候--enable-libass，但是不知道srt的該咋辦

2 down vote accepted

The problem The subtitles filter requires libass as a dependency, but your build is missing --enable-libass. Solution You will have to compile ffmpeg with libass support, or download a build from the FFmpeg Download page (under the "Linux Static Builds" section).

這個地方說subtitles這個filter是以libass作爲基礎的，那看來編譯上libass應該就可以了

有的地方給的答案：

Solution:
1. Right click "1.srt" and Open With "Notepad".
2. File > Save as... :
-File name: 1.srt
-Save as type: All Files
-Encoding: UTF-8
> Save.