Re: [FFmpeg-devel] [PATCH v3 2/2] avcodec: add external dec libvvdec for H266/VVC

From: Nuo Mi <nuomi2021@gmail.com>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: Re: [FFmpeg-devel] [PATCH v3 2/2] avcodec: add external dec libvvdec for H266/VVC
Date: Sat, 18 May 2024 22:04:07 +0800
Message-ID: <CAFXK13cfcgnLcUvvyYPattwRbkkf-BPLMfTTundAebx8394YMQ@mail.gmail.com> (raw)
In-Reply-To: <0101018f8791efc1-eae3fee2-bc7b-4371-a71e-178fdeac5360-000000@us-west-2.amazonses.com>

On Sat, May 18, 2024 at 1:20 AM Cosmin Stejerean via ffmpeg-devel <
ffmpeg-devel@ffmpeg.org> wrote:

>
>
> > On May 14, 2024, at 9:28 AM, Lynne via ffmpeg-devel <
> ffmpeg-devel@ffmpeg.org> wrote:
> >
> > On 14/05/2024 17:09, Christian Bartnik wrote:
> >> From: Thomas Siedel <thomas.ff@spin-digital.com>
> >> Add external decoder VVdeC for H266/VVC decoding.
> >> Register new decoder libvvdec.
> >> Add libvvdec to wrap the vvdec interface.
> >> Enable decoder by adding --enable-libvvdec in configure step.
> >> Co-authored-by: Christian Bartnik chris10317h5@gmail.com
> >> Signed-off-by: Christian Bartnik <chris10317h5@gmail.com>
> >> ---
> >>  configure              |   5 +
> >>  libavcodec/Makefile    |   1 +
> >>  libavcodec/allcodecs.c |   1 +
> >>  libavcodec/libvvdec.c  | 617 +++++++++++++++++++++++++++++++++++++++++
> >>  4 files changed, 624 insertions(+)
> >>  create mode 100644 libavcodec/libvvdec.c
> >
> > I would prefer to have this one skipped, as initially suggested.
>
> Why? I tried to look back through the list but didn't see anything.
>
Hi Cosmin,
This happened many years ago. See the discussion here:
https://patchwork.ffmpeg.org/project/ffmpeg/patch/20201221060710.12230-6-nuomi2021@gmail.com/#60589
Now that we have an internal vvc decoder, we can focus on improving it.
As for the encoder, it is far more complex than the decoder. Reasonable to
wrapper other libraries just like libx264 and libx265...

>
> - Cosmin
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