[FFmpeg-trac] #6105(undetermined:closed): Closed captions not exported from mpeg2video

FFmpeg trac at avcodec.org
Sat Jun 20 01:31:56 EEST 2020

#6105: Closed captions not exported from mpeg2video
             Reporter:  cehoyos      |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:  invalid
             Keywords:  cc           |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by richardpl):

 {{{./linux/ccextractor ~/Downloads/output.ts -o x.srt
 CCExtractor 0.88, Carlos Fernandez Sanz, Volker Quetschke.
 Teletext portions taken from Petr Kutalek's telxcc
 Input: /home/computer/Downloads/output.ts
 [Extract: 1] [Stream mode: Autodetect]
 [Program : Auto ] [Hauppage mode: No] [Use MythTV code: Auto]
 [Timing mode: Auto] [Debug: No] [Buffer input: No]
 [Use pic_order_cnt_lsb for H.264: No] [Print CC decoder traces: No]
 [Target format: .srt] [Encoding: UTF-8] [Delay: 0] [Trim lines: No]
 [Add font color data: Yes] [Add font typesetting: Yes]
 [Convert case: No][Filter profanity: No] [Video-edit join: No]
 [Extraction start time: not set (from start)]
 [Extraction end time: not set (to end)]
 [Live stream: No] [Clock frequency: 90000]
 [Teletext page: Autodetect]
 [Start credits text: None]
 [Quantisation-mode: CCExtractor's internal function]

 Opening file: /home/computer/Downloads/output.ts
 File seems to be a transport stream, enabling TS mode
 Analyzing data in general mode

 New video information found
 [720 * 480] [AR: 02 - 4:3] [FR: 04 - 29.97] [progressive: no]

 100%  |  04:59
 Number of NAL_type_7: 0
 Number of VCL_HRD: 0
 Number of NAL HRD: 0
 Number of jump-in-frames: 0
 Number of num_unexpected_sei_length: 0

 Total frames time:        00:04:59:932  (8989 frames at 29,97fps)
 CC type 0: 0 (NTSC line 21 field 1 closed captions)
 CC type 1: 0 (NTSC line 21 field 2 closed captions)
 CC type 2: 0 (DTVCC Channel Packet Data)
 CC type 3: 0 (DTVCC Channel Packet Start)

 Min PTS:                                00:00:01:700
 Max PTS:                                00:05:01:665
 Length:                          00:04:59:965

 Initial GOP time:          03:08:57:734
 Final GOP time:          03:13:57:300+10F
 Diff. GOP length:          00:04:59:566+10F     (00:04:59:899)

 Number of key frames: 761
 Total user data fields: 17978
 HDTV type user data fields: 17978
 Done, processing time = 3 seconds

 No captions were found in input.
 Issues? Open a ticket here}}}

Ticket URL: <https://trac.ffmpeg.org/ticket/6105#comment:7>
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