Pixel Prism 9.1+
Pixel Prism 9.1 versus Plex Transcoder 6.1.3
Plex Transcoder 6.1.3
Pixel Prism patches
Metal HDR processing
Metal GPU scaling and HDR-to-SDR tone mapping keep HDR watchable on SDR displays without taxing the CPU or losing color accuracy.
No equivalent Metal HDR pipeline.
Dolby Vision Profile 7 base layer
Extracts Profile 7's HDR-compatible base layer for standards-correct Safari HLS delivery without falsely relabeling it as Profile 8.1.
No equivalent Profile 7 base-layer delivery path.
Pipeline and codecs
Threaded transcode
Parallel demux, decode, filtering, encoding, and muxing.
No current threaded pipeline scheduler.
VVC
Native VVC decoding with current x86 and Arm optimization.
Parser and mux plumbing, but no native VVC decoder.
xHE-AAC
Native USAC/xHE-AAC decoding.
No xHE-AAC decoder.
AAC encoder
NMR-based perceptual coding, enabled by default.
Predates the NMR encoder.
Multiview HEVC
MV-HEVC decoding, including spatial video sources.
No equivalent MV-HEVC decoder.
HDR metadata
HDR encode metadata
Preserves mastering-display and content-light metadata through x264, x265, and SVT-AV1.
Missing parts of the later encoder metadata paths.
AV1 HDR10+
Preserves HDR10+ metadata through libaom decode and encode.
No equivalent libaom HDR10+ path.
Current dynamic HDR
SMPTE ST 2094-50 metadata and current HDR Vivid parsing.
No SMPTE ST 2094-50 implementation.
Hardware acceleration
Windows decode
D3D12VA decode for H.264, HEVC, VP9, AV1, MPEG-2, and VC-1.
No current D3D12VA generation.
Windows encode and filters
D3D12 H.264, HEVC, and AV1 encoding, scaling, and deinterlacing.
No D3D12 encoding, scaling, or deinterlacing.
Vulkan encode
H.264, HEVC, and AV1 encoding on supported Vulkan drivers.
Vulkan decode, but no equivalent encoders.
VideoToolbox
Hardware AV1 and ProRes RAW decoding on supported Apple hardware.
No equivalent AV1 or ProRes RAW VideoToolbox paths.
Formats and CPU work
ProRes RAW
Native decode with Vulkan acceleration.
No ProRes RAW decoder.
APV
Native decode with Vulkan acceleration.
No APV decoder.
Animated WebP
Native demuxing and decoding.
No animated WebP decoder or demuxer.
Image collections
Tiled HEIF assembly and animated JPEG XL decoding.
No equivalent tiled HEIF or animated JPEG XL path.
CPU optimization
Newer Arm64 and x64 codec SIMD plus swscale dispatch.
Predates the later optimization work.
* Hardware acceleration depends on the device and driver.