From: Devin Heitmueller <devin.heitmueller@ltnglobal.com>
To: BUCCIANTINI Francesco - ADECCO <francesco.bucciantini.adecco@skytv.it>
Cc: Devin Heitmueller <dheitmueller@ltnglobal.com>,
FFmpeg development discussions and patches
<ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [RFC PATCH 0/5] Properly handle CEA-708 caption data when transcoding
Date: Sat, 18 Mar 2023 19:16:46 -0400
Message-ID: <CAHGibzH=gJQpfm3dJONi4Jeq6nZP=689-PoKqt=erK4MWBw7Hg@mail.gmail.com> (raw)
In-Reply-To: <b5c7dc2a-4750-4336-9e88-0463d16fcf87@email.android.com>
On Fri, Mar 17, 2023 at 7:23 PM BUCCIANTINI Francesco - ADECCO
<francesco.bucciantini.adecco@skytv.it> wrote:
>
> This is indeed very welcome.
> Being able to re-encode from 25i to 50p while preserving subtitles has been something I've been trying to do for a while, so seeing this patch for CEA-708 is definitely a nice thing.
>
> I have a question, though: will something similar be done for OP-47 subtitles too?
> Currently they suffer the same issue when a re-encode changes the frame rate... :(
I don't have any plans to work on OP-47, and I'm not sure if anyone
else does. While I've done a bit of work with it in the SDI domain,
I'm not super familiar with how it's treated by ffmpeg, or whether a
similar approach is appropriate for dealing with it. I can say that
the FIFO here is highly specific to the CEA-708 standard, as we have
to disassemble and reassemble the payloads to meet the specification
(i.e. not applicable to OP-47).
Devin
--
Devin Heitmueller, Senior Software Engineer
LTN Global Communications
o: +1 (301) 363-1001
w: https://ltnglobal.com e: devin.heitmueller@ltnglobal.com
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prev parent reply other threads:[~2023-03-18 23:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-17 20:09 Devin Heitmueller
2023-03-17 20:09 ` [FFmpeg-devel] [RFC PATCH 1/5] ccfifo: Properly handle CEA-708 captions through framerate conversion Devin Heitmueller
2023-03-17 20:09 ` [FFmpeg-devel] [RFC PATCH 2/5] vf_fps: properly preserve CEA-708 captions Devin Heitmueller
2023-03-17 20:09 ` [FFmpeg-devel] [RFC PATCH 3/5] yadif: Properly preserve CEA-708 closed captions Devin Heitmueller
2023-03-18 15:48 ` Dennis Mungai
2023-03-18 23:20 ` Devin Heitmueller
2023-03-17 20:09 ` [FFmpeg-devel] [RFC PATCH 4/5] tinterlace: " Devin Heitmueller
2023-03-18 17:12 ` Thomas Mundt
2023-03-18 23:22 ` Devin Heitmueller
2023-03-19 16:50 ` Thomas Mundt
2023-03-19 17:33 ` Devin Heitmueller
2023-03-17 20:09 ` [FFmpeg-devel] [RFC PATCH 5/5] vf_ccrepack: Add new filter to repack CEA-708 side data Devin Heitmueller
2023-03-17 23:23 ` [FFmpeg-devel] [RFC PATCH 0/5] Properly handle CEA-708 caption data when transcoding BUCCIANTINI Francesco - ADECCO
2023-03-18 23:16 ` Devin Heitmueller [this message]
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