Hi everyone,
We are trying to create a mpegts with a ISO/IEC 14496-17 (MPEG-4 text)
subtitles track, using WebVTT, but seems like ffmpeg creates a ISO
13818-1 PES private data instead. The following is the ffmpeg command:
ffmpeg -i subtitle.vtt -c:s mov_text -f mpegts output3GPP.ts
And the following is the output of the ffprobe for that file:
Input #0, mpegts, from 'output3GPP.ts':
Duration: 00:00:19.00, start: 1.400000, bitrate: 1 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Data: bin_data ([6][0][0][0] / 0x0006)
Unsupported codec with id 98314 for input stream 0
However, if we generate a mp4, it works, the following is the command:
ffmpeg -i subtitle.vtt -c:s mov_text -f mp4 output3GPP.ts
And the following is the output of the ffprobe for that file:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'output3GPP.ts':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2mp41
encoder : Lavf57.83.100
Duration: 00:00:20.00, start: 0.000000, bitrate: 0 kb/s
Stream #0:0[0x1](und): Subtitle: mov_text (tx3g / 0x67337874), 0
kb/s (default)
Metadata:
handler_name : SubtitleHandler
Any reason why both commands behave differently? is mpegts not
supporting ISO/IEC 14496-17 (MPEG-4 text)?
Note: attached is the subtitle.vtt file.
Regards
--
Daniel Andrés Pelaez López
WEBVTT
00:00.000 --> 00:01.000
Subtitle 1
00:01.000 --> 00:02.000
Subtitle 2
00:02.000 --> 00:03.000
Subtitle 3
00:03.000 --> 00:04.000
Subtitle 4
00:04.000 --> 00:05.000
Subtitle 5
00:05.000 --> 00:06.000
Subtitle 6
00:06.000 --> 00:07.000
Subtitle 7
00:07.000 --> 00:08.000
Subtitle 8
00:08.000 --> 00:09.000
Subtitle 9
00:09.000 --> 00:10.000
Subtitle 10
00:10.000 --> 00:11.000
Subtitle 11
00:11.000 --> 00:12.000
Subtitle 12
00:12.000 --> 00:13.000
Subtitle 13
00:13.000 --> 00:14.000
Subtitle 14
00:14.000 --> 00:15.000
Subtitle 15
00:15.000 --> 00:16.000
Subtitle 16
00:16.000 --> 00:17.000
Subtitle 17
00:17.000 --> 00:18.000
Subtitle 18
00:18.000 --> 00:19.000
Subtitle 19
00:19.000 --> 00:20.000
Subtitle 20
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