On Sat, 9 Aug 2014 01:28:05 -0400
compn wrote:
> On Mon, 04 Aug 2014 19:58:52 +0200
> Gisle Sælensminde wrote:
>
> > I'm trying to add support for closed captions in ffmpeg, namely
> > cea608 and cea708.
>
> mythtv fork of ffmpeg has this support already. maybe we can port it
> (along with som
On Mon, 04 Aug 2014 19:58:52 +0200
Gisle Sælensminde wrote:
> I'm trying to add support for closed captions in ffmpeg, namely
> cea608 and cea708.
mythtv fork of ffmpeg has this support already. maybe we can port it
(along with some other changes)?
https://code.mythtv.org/trac/browser
http://s
On Mon, Aug 04, 2014 at 10:16:25PM +0200, Gisle Sælensminde wrote:
> Den 04. aug. 2014 21:58, skrev Reimar Döffinger:
> >*scratches head* I wonder now if you misunderstood or if you discarded the
> >variant I pointed out due to effort/complexity?
>
> Or because I don't know all the parts of the ff
Den 04. aug. 2014 21:58, skrev Reimar Döffinger:
*scratches head* I wonder now if you misunderstood or if you discarded
the variant I pointed out due to effort/complexity?
Or because I don't know all the parts of the ffmpeg code well enough.
Since both you and others has suggested that this is
On Mon, Aug 04, 2014 at 09:35:02PM +0200, Gisle Sælensminde wrote:
> Bitstream filter:
>
> Pro:
>
> - Modular, the CC code can be kept separate.
> - Less complex code
>
> Cons:
>
> Need for features that I can't see is present in the bitstream filters:
> - As far as I can see -no support for ti
> into the decoders. The decoder approch would also not work for insertion of
> closed captions (for h.264 that would be x264, and I can't see that CC has a
> place there really). I'm uncertain enough that I would prefere to here the
> opinion here before submitting a patch. As far as I can see it
Den 04. aug. 2014 21:11, skrev Reimar Döffinger:
On Mon, Aug 04, 2014 at 08:04:39PM +0100, Kieran Kunhya wrote:
And as far as I can tell if you want to remux
but with separate subtitle stream that would even mean that you have to
re-encode the video for no good reason.
You can just swap out the
> Uh, no.
> The point is to get the CC data out you need to decode.
> Now that you have the video decoded, if you want to mux it you have
> to encode it again.
Whether you decode the video or not is unrelated to your ability to
replace the SEI and replace the captions.
You'd still need to know the
On Mon, Aug 04, 2014 at 08:51:57PM +0200, wm4 wrote:
> On Mon, 4 Aug 2014 20:47:37 +0200
> Reimar Döffinger wrote:
>
> > On Mon, Aug 04, 2014 at 08:19:38PM +0200, Hendrik Leppkes wrote:
> > > Am 04.08.2014 19:59 schrieb "Gisle Sælensminde" :
> > > >
> > > > I'm trying to add support for closed ca
On Mon, Aug 04, 2014 at 08:04:39PM +0100, Kieran Kunhya wrote:
> > And as far as I can tell if you want to remux
> > but with separate subtitle stream that would even mean that you have to
> > re-encode the video for no good reason.
>
> You can just swap out the caption data. It's guaranteed to be
> And as far as I can tell if you want to remux
> but with separate subtitle stream that would even mean that you have to
> re-encode the video for no good reason.
You can just swap out the caption data. It's guaranteed to be CBR anyway.
___
ffmpeg-devel
On Mon, 4 Aug 2014 20:47:37 +0200
Reimar Döffinger wrote:
> On Mon, Aug 04, 2014 at 08:19:38PM +0200, Hendrik Leppkes wrote:
> > Am 04.08.2014 19:59 schrieb "Gisle Sælensminde" :
> > >
> > > I'm trying to add support for closed captions in ffmpeg, namely cea608 and
> > > cea708. Unlike normal sub
On Mon, Aug 04, 2014 at 08:19:38PM +0200, Hendrik Leppkes wrote:
> Am 04.08.2014 19:59 schrieb "Gisle Sælensminde" :
> >
> > I'm trying to add support for closed captions in ffmpeg, namely cea608 and
> > cea708. Unlike normal subtitles, these are embedded in the video frames
> > themselves rather t
Am 04.08.2014 19:59 schrieb "Gisle Sælensminde" :
>
> I'm trying to add support for closed captions in ffmpeg, namely cea608 and
> cea708. Unlike normal subtitles, these are embedded in the video frames
> themselves rather than a separate track or file. As a first step I try to
write
> bitstreams f
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