On Sun, Jan 19, 2025 at 12:40 AM Zhao Zhili <
quinkblack-at-foxmail@ffmpeg.org> wrote:
>
>
> > On Jan 18, 2025, at 23:30, Nuo Mi wrote:
> >
> > Hi Zhili,
> > Thank you for v2,
> > +1
> >
> > Nit: The if statement is too long. Move it after generate_missing_ref and
> > break it up to simplify
ping
于2024年12月23日周一 23:02写道：
> From: sunyuechi
>
> ---
> libavcodec/riscv/h26x/asm.S| 36 +-
> libavcodec/riscv/vvc/sad_rvv.S | 2 +-
> 2 files changed, 19 insertions(+), 19 deletions(-)
>
> diff --git a/libavcodec/riscv/h26x/asm.S b/libavcodec/riscv/h26x/a
On Sat, Jan 18, 2025 at 05:33:19PM +0900, Lynne wrote:
> On 18/01/2025 14:00, Michael Niedermayer wrote:
> > This performs a tiny bit better than not using it but it is incompatible
> > with the RCT which gives a bigger gain
> >
> > Sponsored-by: Sovereign Tech Fund
> > Signed-off-by: Michael Nied
The float sign bits seem to take about 1% of space in the compressed
bitstream. Storing it separately in a RC symbol each is worse
---
libavcodec/ffv1.c | 1 +
libavcodec/ffv1.h | 1 +
libavcodec/ffv1enc_template.c | 24
3 files changed, 18 insert
This allows switching it on conditionally and also for non float,
it may improve compression for RGB data that was paletted
or other synthetic images
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer
---
libavcodec/ffv1.h | 1 +
libavcodec/ffv1dec.c | 8 ++
float16 (and more so float32) have many odd values
half the values are negative, many are larger than "1.0"
and many values are very close to 0.
Storing the 16bits as is, looses compression because of the mixture
of dense and sparse regions and also many completely unused ones.
This simply remaps
float16 (and more so float32) have many odd values
half the values are negative, many are larger than "1.0"
and many values are very close to 0.
Storing the 16bits as is, looses compression because of the mixture
of dense and sparse regions and also many completely unused ones.
This simply remaps
float16 is a sign bit followed by "positive is larger" exponent and mantisse
that way the up direction changes between negative and positive numbers
flipping the exponent and mantisse for positive numbers gives a compression
gain of 0.5% for both RCT and noRCT modes using the
ACES_OT_VWG_SampleFram
This patch makes sure that ogg/flac headers are parsed again when
encountering a new logic stream inside a chained ogg bistream[1].
This patches makes it possible to retrieve metadata in chained ogg/flac
bitstreams. It is particularly important because ogg/flac is one of the
only (if not the only
> On Jan 18, 2025, at 23:30, Nuo Mi wrote:
>
> Hi Zhili,
> Thank you for v2,
> +1
>
> Nit: The if statement is too long. Move it after generate_missing_ref and
> break it up to simplify the logic.
Put the check before generate_missing_ref is meant to avoid allocate frame
when it won’t be used
Hi Zhili,
Thank you for v2,
+1
Nit: The if statement is too long. Move it after generate_missing_ref and
break it up to simplify the logic.
like:
if (!ref) {
ref = generate_missing_ref(s, fc, poc);
if (!ref)
return AVERROR(ENOMEM);
}
+if (ref->flags &
From: Zhao Zhili
---
v3: Use temporary variable to make the condition check more readable
v2: Fix GDR stream
libavcodec/vvc/refs.c | 20 +++-
libavcodec/vvc/refs.h | 1 +
2 files changed, 20 insertions(+), 1 deletion(-)
diff --git a/libavcodec/vvc/refs.c b/libavcodec/vvc/refs.c
On Sat, Jan 18, 2025 at 4:18 AM Frank Plowman wrote:
> When the chroma format changes mid-sequence, c->pix_fmt and s->pix_fmt
> can get out-of-sync. More specifically,
> 1. export_frame_params is called.
>c->pix_fmt and s->pix_fmt are both set to their new values.
> 2. set_output_format is c
Michael Niedermayer 于2025年1月18日周六 06:31写道：
>
> On Thu, Jan 16, 2025 at 04:39:49AM +0100, Michael Niedermayer wrote:
> > Fixes: CVE-2023-6602, V. DASH Playlist SSRF
> >
> > Found-by: Harvey Phillips of Amazon Element55 (element55)
> > Signed-off-by: Michael Niedermayer
> > ---
> > libavformat/das
On 18/01/2025 14:00, Michael Niedermayer wrote:
This performs a tiny bit better than not using it but it is incompatible
with the RCT which gives a bigger gain
Sponsored-by: Sovereign Tech Fund
Signed-off-by: Michael Niedermayer
---
libavcodec/ffv1.h | 20
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