[FFmpeg-devel] [Uncompressed MP4] RFC - Draft Encoder

[Michael Niedermayer]

On Wed, Oct 09, 2024 at 07:38:43AM -0600, Devon Sookhoo wrote:
> With this patch, I was able to use the following command to generate an
> uncompressed mp4:
> $ ffmpeg  -i input.mp4   -c:v rawvideo   -pix_fmt rgb24   -tag:v uncv
>  out.mp4
> 
> The output file successfully played in GPAC.
> 
> My first question is whether to reuse the existing AV_CODEC_ID_RAWVIDEO, or
> if a brand new codec should be created specifically for handling
> uncompressed MP4 files. For those not familiar with ISO/IEC 23001-17:2024,
> this uncompressed codec has many input parameters, making it configurable
> enough to handle just about any type of data. A complete
> implementation would be quite involved which is why I'm questioning if
> "-c:v rawvideo" is the correct choice.
> 
> Any feedback would be greatly appreciated.

>  libavcodec/rawenc.c  |   18 ++++++++++
>  libavformat/movenc.c |   88 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 106 insertions(+)
> 84f6e16f8e6ae76bdbeb9517e94576a930fa4d01  0001-Encode-RGB-interleaved-8-bit-uncompressed-mp4.patch
> From 62b59527bd25d7759b374fb47b398140df740946 Mon Sep 17 00:00:00 2001
> From: dukesook <devonsookhoo14 at gmail.com>
> Date: Tue, 24 Sep 2024 12:27:31 -0600
> Subject: [PATCH] Encode RGB interleaved 8 bit uncompressed mp4

breaks:
fate-mov-vfr

--- -	2024-10-11 22:55:50.346184682 +0200
+++ tests/data/fate/mov-vfr	2024-10-11 22:55:50.338195434 +0200
@@ -1 +1 @@
-1558b4a9398d8635783c93f84eb5a60d
+73f24e1cfcbbf1e6da06ff8658424df2
TEST    shortest
TEST    ffmpeg-filter-in-eof
Test mov-vfr failed. Look at tests/data/fate/mov-vfr.err for details.
TEST    ffmpeg-streamcopy-t
make: *** [tests/Makefile:311: fate-mov-vfr] Error 1
make: *** Waiting for unfinished jobs....

thx

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Nations do behave wisely once they have exhausted all other alternatives. 
-- Abba Eban
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