[FFmpegSubtitlesConvertorPP] fix not working when srt is used as the intermediate format between ttml/dfxp and other format

It was trying to use the ttml/dfxp file with ffmpeg, which doesn't have support for them. I broke it in e04398e397.
9 years ago · 7e62c2eb6d
1 changed files with 1 additions and 0 deletions
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@ -508,6 +508,7 @@ class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):

                with io.open(srt_file, 'wt', encoding='utf-8') as f:
                    f.write(srt_data)
+                old_file = srt_file

                ext = 'srt'
                subs[lang] = {