[FFmpeg-user] How do I include ATSC closed captions in a file conversion?

[Francois Visagie]

> -----Original Message-----
> From: ffmpeg-user-bounces at ffmpeg.org [mailto:ffmpeg-user-
> bounces at ffmpeg.org] On Behalf Of voip at gmx.ca
> Sent: 09 December 2014 23:49
> To: ffmpeg-user at ffmpeg.org
> Subject: Re: [FFmpeg-user] How do I include ATSC closed captions in a file
> conversion?
> 
> On Tuesday, December 09, 2014 at 4:08 PM, Anshul
> <anshul.ffmpeg at gmail.com> wrote:
> 
> > If you have closed caption in different stream, u should use -scodec
copy.
> 
> Since this is a satellite broadcast and not traditional over-the-air, that
got me
> to thinking a bit more about this.  I found out that if I added EITHER
-c:s copy
> (s indicates subtitles) OR -c:d copy (d indicates data), then it worked
and

This is expected behaviour. By default ffmpeg excludes subtitles from the
output.

> when I ran mediainfo on the converted file, I now saw this:
> 
> Text #1
> ID                                       : 257 (0x101)-CC1
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-608
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 4mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
> 
> Text #2
> ID                                       : 257 (0x101)-CC3
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-608
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 4mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
> 
> Text #3
> ID                                       : 257 (0x101)-1
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-708
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 4mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
> 
> Text #4
> ID                                       : 257 (0x101)-3
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-708
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 4mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
> 
> Didn't matter whether I used -c:s copy or -c:d copy, as long as I added
one or
> the other the closed captions were there and I could see them in VLC by
> selecting s "Subtitles Track" from the Video menu.  To me using -c:s makes
> more intuitive sense, but either way it works.  So, thank you for jogging
my
> thought process on this.
> 
> By the way, I am not saying this will work for over-the-air broadcasts, or
even
> for all satellite feeds, but it works with this one.  Nor am I saying this
will work
> when played back using something other than VLC (for example I doubt it
> would work with XBMC, because they currently don't seem to support
> subtitles that are not in a separate text file).
> 
> My final conversion command is this:
> 
> ffmpeg -loglevel quiet -i "original.ts" -c:v copy -filter_complex
> '[0:1][0:2][0:3]amerge=inputs=3,pan=5.1|FL=c0|FR=c1|FC=c2|LFE=c3|BL=c4
> |BR=c5' -c:a ac3 -c:s copy "converted.ts"
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