AV1R 0.1.2
Minimum coded extent
handling
- GPU encoder now queries
minCodedExtent from the Vulkan
driver before opening the ffmpeg decode pipe. Input frames smaller than
the hardware minimum (e.g. 170×196 vs driver minimum 320×128) are
automatically scaled up to the minimum supported resolution.
- Vulkan context is initialized before the ffmpeg pipe so that the
corrected dimensions are used for both decoding and encoding.
- Fixed segfault in
av1r_vulkan_query_min_extent(): the
VkVideoEncodeAV1CapabilitiesKHR structure was missing from
the pNext chain passed to
vkGetPhysicalDeviceVideoCapabilitiesKHR, causing RADV to
write to an unmapped address.
CRF / QIndex mapping
- CRF-to-QIndex mapping changed from linear (
crf * 4) to
nonlinear LUT approximating aomenc --cq-level. Linear
mapping gave qIndex 112 at CRF 28 which was too low for real compression
on RADV. The new mapping gives qIndex 175 at CRF 28, matching expected
AV1 compression ratios.
- On RADV, VBR mode is reported as supported but produces huge files;
DISABLED mode (CQP) with
constantQIndex is the only working
path.
AV1R 0.1.1
Vulkan AV1 GPU Encoding —
fully working
- GPU encoding now works end-to-end on AMD RDNA4 (RX
9070, RADV GFX1201) via Vulkan
VK_KHR_VIDEO_ENCODE_AV1.
- Two-queue architecture: transfer queue (buffer→image upload) +
encode queue (video encoding) with semaphore synchronization. Fixes
VK_ERROR_DEVICE_LOST on GPUs where the encode queue has no
TRANSFER capability.
- Correct NV12 upload: Y plane and UV plane copied as separate
vkCmdCopyBufferToImage calls with proper
bufferRowLength for each plane.
- Sequence Header OBU automatically prepended via
vkGetEncodedVideoSessionParametersKHR — output plays in all
players.
- Rate control: DISABLED mode (CQP) with
constantQIndex
derived from CRF (qIndex = crf * 4). VBR/CBR modes are
reported as supported by RADV but have no effect; CQP is the only
working mode.
- Audio track from the original file is preserved during IVF→MP4
muxing.
- Dynamic loading of all Vulkan Video KHR extension functions via
vkGetInstanceProcAddr/vkGetDeviceProcAddr for
compatibility with SDK < 1.3.290.
Multi-page TIFF support
- Multi-page TIFF stacks are now extracted to a temporary PNG sequence
via the
magick package before encoding. Both GPU and CPU
paths support this.
magick added to Suggests (required only
for multi-page TIFF input).- Image sequences (printf patterns like
frame%06d.png)
are passed to ffmpeg with -framerate for correct
decoding.
- Tested on 510-frame 16-bit grayscale confocal microscopy TIFF stack
(32.7 MB → 3.8 MB at CRF 1, 8.6x compression with quality
preservation).
CRAN Fixes
- Removed redundant “A tool for” from Description.
- Single-quoted software and API names in Title and Description per
CRAN policy.
- Replaced
\dontrun{} with \donttest{} in
all examples.
- Examples now write to
tempdir() instead of user’s home
filespace.
- Bundled Khronos
VK_KHR_video_encode_av1 headers
(src/vk_video/) — package no longer requires Vulkan SDK
>= 1.3.290 at build time; builds against any Vulkan SDK >= 1.3.275
with the bundled polyfill.
configure now detects bundled AV1 encode headers and
enables GPU path automatically.
Initial Release
- CPU encoding via FFmpeg (
libsvtav1 /
libaom-av1).
- Automatic backend selection: GPU (Vulkan) → CPU (FFmpeg).
- Supports H.264, H.265, AVI/MJPEG, TIFF stacks, and TIFF sequences as
input.
convert_to_av1() for single-file and batch
conversion.detect_backend(), vulkan_available(),
vulkan_devices() for diagnostics.