From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
To: ffmpeg-devel@ffmpeg.org
Subject: Re: [FFmpeg-devel] [PATCH v7 3/7] avcodec/webp_parser: parse each frame into one packet
Date: Thu, 7 Dec 2023 18:42:58 +0100
Message-ID: <AS8P250MB0744273A3F1FD08503DE97198F8BA@AS8P250MB0744.EURP250.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20231206013505.57654-4-thilo.borgmann@mail.de>
Thilo Borgmann via ffmpeg-devel:
> ---
> libavcodec/webp_parser.c | 130 +++++++++++++++++++++++++++------------
> 1 file changed, 89 insertions(+), 41 deletions(-)
>
According to
https://developers.google.com/speed/webp/docs/riff_container#extended_file_format
metadata chunks are stored after the image data; if you split the data
into packets, then the metadata while only become available for the very
last frame, although it pertains to all of them. This makes your
approach unworkable.
Additionally, the WebP muxer expects animations to be contained in a
single packet, hence the warnings from Michael.
- Andreas
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next prev parent reply other threads:[~2023-12-07 17:41 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 1:34 [FFmpeg-devel] [PATCH v7 0/7] webp: add support for animated WebP decoding Thilo Borgmann via ffmpeg-devel
2023-12-06 1:34 ` [FFmpeg-devel] [PATCH v7 1/7] avcodec/webp: move definitions into header Thilo Borgmann via ffmpeg-devel
2023-12-07 16:09 ` Anton Khirnov
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 2/7] avcodec/webp: remove unused definitions Thilo Borgmann via ffmpeg-devel
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 3/7] avcodec/webp_parser: parse each frame into one packet Thilo Borgmann via ffmpeg-devel
2023-12-07 17:42 ` Andreas Rheinhardt [this message]
[not found] ` <53478080-5F0E-489B-828D-9EF1F22F3D4F@cosmin.at>
2023-12-08 2:02 ` Cosmin Stejerean via ffmpeg-devel
2023-12-12 12:14 ` Thilo Borgmann via ffmpeg-devel
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 4/7] libavcodec/webp: add support for animated WebP decoding Thilo Borgmann via ffmpeg-devel
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 5/7] avcodec/webp: make init_canvas_frame static Thilo Borgmann via ffmpeg-devel
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 6/7] libavformat/webp: add WebP demuxer Thilo Borgmann via ffmpeg-devel
2023-12-06 1:35 ` [FFmpeg-devel] [PATCH v7 7/7] fate: add test for animated WebP Thilo Borgmann via ffmpeg-devel
2023-12-06 22:01 ` [FFmpeg-devel] [PATCH v7 0/7] webp: add support for animated WebP decoding Michael Niedermayer
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