They are similar to AVIF images (both use the HEIF container).
The only additional work needed is to parse the hvcC box and put
it in the extradata.
With this patch applied, ffmpeg (when built with an HEVC decoder)
is able to decode the files in
https://github.com/nokiatech/heif/tree/gh-pages/content/images
Also add a couple of fate tests with samples from
https://github.com/nokiatech/heif_conformance/tree/master/conformance_files
Partially fixes trac ticket #6521.
Signed-off-by: Vignesh Venkatasubramanian <vigneshv@google.com>
Signed-off-by: James Almer <jamrial@gmail.com>
option kernel_driver for vaapi device creation can be used to choose the
desired device on Linux, which is more convenient than DRM render node
in a multiple-device system (e.g. Intel iGPU + AMD dGPU or inverse), but
this option requires libdrm works. vaapi is autodetected at
configuration time, let's make libdrm autodetected too.
Reviewed-by: Zhao Zhili <quinkblack@foxmail.com>
Signed-off-by: Haihao Xiang <haihao.xiang@intel.com>
Filter graph reconfigurations can cause nontrivial issues, e.g. PTS
discontinuities, so it is better to warn the user about them.
Signed-off-by: Marton Balint <cus@passwd.hu>
FIx warnings (soon to be errors in GCC 14, already so in Clang 15):
```
src/libavcodec/vulkan_av1.c: In function ‘vk_av1_create_params’:
src/libavcodec/vulkan_av1.c:183:43: error: initialization of ‘long long unsigned int’ from ‘void *’ makes integer from pointer without a cast [-Wint-conversion]
183 | .videoSessionParametersTemplate = NULL,
| ^~~~
src/libavcodec/vulkan_av1.c:183:43: note: (near initialization for ‘(anonymous).videoSessionParametersTemplate’)
```
Use Vulkan's VK_NULL_HANDLE instead of bare NULL.
Fix Trac ticket #10724.
Was reported downstream in Gentoo at https://bugs.gentoo.org/919067.
Signed-off-by: Sam James <sam@gentoo.org>
These functions encode a slice of alpha (1 to 8 macroblocks) which are
expected to be encoded as a repeated sequence of "[diff][run-1]", where
diff is the running difference of the alpha value and run is how many
times that value is expected to be duplicated (within the limit of a
grand total of 2048 unpacked samples, corresponding to a slice of 8 MB).
Even when run==0 (the run variable semantic is actually "run minus 1"),
there is always a diff previously encoded that needs a counter of at
least 1. This means we need to call put_alpha_run() unconditionally at
the end of the bitstream to account for the last running diff.
This commit fixes glitchy playbacks on QuickTime with M2 and M3 hardware
(but not M1 for some mysterious reason) with files generated with
commands such as:
ffmpeg -f lavfi -i testsrc2=d=5:s=912x320,chromakey -c:v prores_aw -profile:v 4 -y aw.mov
ffmpeg -f lavfi -i testsrc2=d=5:s=912x320,chromakey -c:v prores_ks -profile:v 4444 -y ks.mov
The glitch expresses itself deterministically as blinking black
rectangles on random frames (for example on frame 21, 54, 71, 79, ...).
Even with the proresdec from FFmpeg, overreads actually happens while
reading the run-minus-1 value (around val = get_bits(gb, 4) in
unpack_alpha()). This doesn't seem to cause any particular issue because
it simply overreads into the next slice, and because the decoder is
resilient, but it's still a problem.
The investigation leading to this fix was made possible because of paid
work for Jitter (https://jitter.video).
Fixes ticket #10255.
Clément Bœsch
James Almer
Vignesh Venkatasubramanian via ffmpeg-devel
Haihao Xiang
Marton Balint
Marth64
Thilo Borgmann
Nuo Mi
Sam James