Ignite/README.md

Supported

• y4m pipes
• Frame tested support for 4:4:4, 4:2:2, 4:2:0. Probably 4:0:0 as well, untested.
• Frame tested support for 8, 10, 12 bit depth. Probably 14 and 16 as well, untested.
• VMAF tools
• IVF reader
• Frameserver
• TODO: make list per encoder and decoder.

Bitdepth / subsampling Frame support matrix

Depth/Sampling	4:0:0	4:2:0	4:2:2	4:4:4
8-bit	✅	✅	✅	✅
10-bit	✅	✅	⚠️	⚠️
12-bit	⚠️	⚠️	⚠️	✅
14-bit	❔	❔	❔	❔
16-bit	❔	❔	❔	❔

Legend:

✅ = supported, tested regularly

⚠️ = supported, tested sparsely/manually

❔ = probably supported, not tested

❌ = unsupported

Formats supported

Format	Decoder	Encoder	Notes
YUV4MPEG2	✅	❌	Supports most bitdepth and chroma subsampling. Library limited, not format limited. Decoding via S.O.N.G/Ignite
H.264	❌	✅	Supports 8-bit and 10-bit; 4:0:0, 4:2:0, 4:2:2, 4:4:4 chroma subsampling. Encoding via x264 into .h264 bitstream.
H.265	❌	❌
VP9	❌	❌
AV1	✅	✅	Supports 8-bit, 10-bit and 12-bit; 4:0:0, 4:2:0, 4:2:2, 4:4:4 chroma subsampling. Decoding via dav1d from .ivf bitstream Encoding via libaom-av1 into .ivf bitstream.

Additionally, a safe command-line call to ffmpeg can be made to decode into compatible YUV4MPEG2 via the integrated ffmpeg decoder.

TODO

• No SAR/PAR handling.
• No color primary / transfer / matrix coefficients handling.

Build tags

Several Golang build tags exist to change which features are included in the project.

disable_library_[library]

This tag disables support for the specified library dependencies.

Current implemented [library]: libdav1d, libaom, libx264, libvmaf.