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9e5b94189e
Recognize MagicYUV sample entries in the built-in go-mp4 probe and consider the probe's codec in addition to the metadata codec when applying the FFmpeg exclude list, so a video can be matched even when one detector misses it. Rename the shared sample-entry scan limit to CodecHeadScanLimit. Also exclude the Matroska Video for Windows wrapper (v_ms/vfw/fourcc) by default, since its actual codec is not exposed by metadata and the format is uncommon.
158 lines
6.4 KiB
Go
158 lines
6.4 KiB
Go
package video
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// Codec represents a video codec identifier.
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type Codec = string
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// Standard video Codec types, see:
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// - https://mp4ra.org/registered-types/codecs
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// - https://developer.mozilla.org/en-US/docs/Web/Media/Guides/Formats/Video_codecs
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//
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// Browser support can be tested by visiting one of the following sites:
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// - https://ott.dolby.com/codec_test/index.html
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// - https://dmnsgn.github.io/media-codecs/
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// - https://cconcolato.github.io/media-mime-support/
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// - https://thorium.rocks/misc/h265-tester.html
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const (
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CodecUnknown Codec = ""
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CodecAvc1 Codec = "avc1" // Advanced Video Coding (AVC), also known as H.264
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CodecDva1 Codec = "dva1" // AVC-based Dolby Vision derived from avc1
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CodecAvc2 Codec = "avc2" // Advanced Video Coding (AVC), might not be fully supported on macOS
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CodecAvc3 Codec = "avc3" // Advanced Video Coding (AVC), might not be fully supported on macOS
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CodecAvc4 Codec = "avc4" // Advanced Video Coding (AVC), might not be fully supported on macOS
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CodecDvav Codec = "dvav" // AVC-based Dolby Vision derived from avc3
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CodecHvc1 Codec = "hvc1" // High Efficiency Video Coding (HEVC), also known as H.265
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CodecDvh1 Codec = "dvh1" // HEVC-based Dolby Vision derived from hvc1
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CodecHvc2 Codec = "hvc2" // HEVC video with constrained extractors and/or aggregators and parameter sets only in the Sample Entry
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CodecHvc3 Codec = "hvc3" // HEVC video with extractors and/or aggregators and parameter sets only in the Sample Entry
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CodecHev1 Codec = "hev1" // HEVC video with parameter sets also in the Samples, not supported on macOS
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CodecDvhe Codec = "dvhe" // HEVC-based Dolby Vision derived from hev1
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CodecHev2 Codec = "hev2" // HEVC video with constrained extractors and/or aggregators and parameter sets in the Sample Entry or samples
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CodecHev3 Codec = "hev3" // HEVC video with extractors and/or aggregators and parameter sets in the Sample Entry or samples
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CodecVvc1 Codec = "vvc1" // Versatile Video Coding (VVC), also known as H.266
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CodecEvc1 Codec = "evc1" // MPEG-5 Essential Video Coding (EVC), also known as ISO/IEC 23094-1
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CodecAv01 Codec = "av01" // AOMedia Video 1 (AV1)
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CodecVp08 Codec = "vp08" // Google VP8
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CodecVp09 Codec = "vp09" // Google VP9
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CodecTheora Codec = "ogv" // Ogg Vorbis Video
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CodecM2TS Codec = "m2t" // MPEG-2 Transport Stream
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CodecWebm Codec = "webm" // Google WebM
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CodecMagicYUV Codec = "magy" // MagicYUV lossless video (FourCC)
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CodecVFW Codec = "vfw" // Video for Windows wrapper; the actual codec is not exposed by metadata
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)
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// Codecs maps supported string identifiers to standard Codec types.
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//
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// Complete list of registered codecs and formats:
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// https://mp4ra.org/registered-types/codecs
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var Codecs = StandardCodecs{
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"": CodecUnknown,
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"a_opus": CodecUnknown,
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"a_vorbis": CodecUnknown,
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CodecAvc1: CodecAvc1,
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CodecDva1: CodecAvc1,
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CodecAvc2: CodecAvc1,
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CodecAvc4: CodecAvc1,
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"avc": CodecAvc1,
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"h264": CodecAvc1,
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"v_avc": CodecAvc1,
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"v_avc1": CodecAvc1,
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"v_avc2": CodecAvc1,
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"v_avc4": CodecAvc1,
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"iso/avc": CodecAvc1,
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"iso/avc1": CodecAvc1,
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"iso/avc2": CodecAvc1,
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"iso/avc4": CodecAvc1,
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"v_mpeg4/avc": CodecAvc1,
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"v_mpeg4/avc1": CodecAvc1,
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"v_mpeg4/iso/avc": CodecAvc1,
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"v_mpeg4/iso/avc1": CodecAvc1,
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CodecAvc3: CodecAvc3,
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CodecDvav: CodecAvc3,
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"v_avc3": CodecAvc3,
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CodecHvc1: CodecHvc1,
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CodecDvh1: CodecHvc1,
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CodecHvc2: CodecHvc1,
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CodecHvc3: CodecHvc1,
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"hevc": CodecHvc1,
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"h265": CodecHvc1,
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"v_hevc": CodecHvc1,
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"hevC": CodecHvc1,
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"hvc": CodecHvc1,
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"v_hvc": CodecHvc1,
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"v_hvc1": CodecHvc1,
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"hvcC": CodecHvc1,
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"hvcc": CodecHvc1,
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CodecHev1: CodecHev1,
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CodecDvhe: CodecHev1,
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CodecHev2: CodecHev1,
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CodecHev3: CodecHev1,
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"hev": CodecHev1,
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"v_hev": CodecHev1,
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"v_hev1": CodecHev1,
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CodecVvc1: CodecVvc1,
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"vvc": CodecVvc1,
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"vvcC": CodecVvc1,
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"vvcc": CodecVvc1,
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"v_vvc": CodecVvc1,
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"v_vvc1": CodecVvc1,
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CodecEvc1: CodecEvc1,
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"evc": CodecEvc1,
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"evcC": CodecEvc1,
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"evcc": CodecEvc1,
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"v_evc": CodecEvc1,
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"v_evc1": CodecEvc1,
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CodecAv01: CodecAv01,
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"av1f": CodecAv01,
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"av1m": CodecAv01,
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"av1M": CodecAv01,
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"av1s": CodecAv01,
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"av1c": CodecAv01,
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"av1C": CodecAv01,
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"av1": CodecAv01,
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"v_av1": CodecAv01,
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"v_av01": CodecAv01,
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CodecVp08: CodecVp08,
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"vp8": CodecVp08,
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"vp80": CodecVp08,
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"v_vp8": CodecVp08,
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"v_vp08": CodecVp08,
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CodecVp09: CodecVp09,
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"vp9": CodecVp09,
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"vp90": CodecVp09,
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"v_vp9": CodecVp09,
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"v_vp09": CodecVp09,
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CodecTheora: CodecTheora,
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"v_ogv": CodecTheora,
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"theora": CodecTheora,
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"v_theora": CodecTheora,
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CodecWebm: CodecWebm,
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CodecMagicYUV: CodecMagicYUV,
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"magicyuv": CodecMagicYUV, // Human-readable name
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"m8rg": CodecMagicYUV, // RGB
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"m8ra": CodecMagicYUV, // RGBA
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"m8rb": CodecMagicYUV, // RGB (alt)
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"m8y0": CodecMagicYUV, // YUV 4:2:0
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"m8y2": CodecMagicYUV, // YUV 4:2:2
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"m8y4": CodecMagicYUV, // YUV 4:4:4
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"m8ya": CodecMagicYUV, // YUVA 4:4:4:4
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"m8g0": CodecMagicYUV, // Grayscale
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CodecVFW: CodecVFW,
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"v_ms": CodecVFW,
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"v_ms/vfw/fourcc": CodecVFW, // Matroska wrapper for a Video for Windows FourCC codec
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}
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// Canonical returns the standard codec name for the given identifier, or the
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// identifier unchanged if it is not a recognized codec alias. Callers should
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// pass a normalized (lowercase) name. This lets the original name reported by
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// a metadata tool (e.g. "m8ra") and its mapped name (e.g. "magy") be treated
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// as equivalent.
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func Canonical(name string) Codec {
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if c, ok := Codecs[name]; ok && c != CodecUnknown {
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return c
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}
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return name
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}
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// StandardCodecs maps strings to codec types.
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type StandardCodecs map[string]Codec
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