Standards Compliance

Movi-Player follows ISO and international standards for maximum compatibility.

Compliance Overview

Component	Status	Key Standards
Demuxer	✅ Compliant	ISO/IEC 14496-14, ISO/IEC 14496-15
Codec Parser	✅ Compliant	ISO/IEC 14496-15, ISO/IEC 23008-2, ITU-T H.264/H.265
Player	✅ Compliant	WebCodecs API, Web Audio API
Element	✅ Compliant	HTML5 Custom Elements, WebGL2
Renderer	✅ Compliant	WebGL2, ITU-T Color Spaces

Container Format Standards

ISO/IEC 14496-14 (MP4)

• Proper parsing of MP4 container structure via FFmpeg WASM
• Support for ftyp, moov, mdat boxes
• Correct track and sample table handling

Matroska/WebM

• Full support for MKV container format
• EBML parsing through FFmpeg
• Multi-track audio/video/subtitle support
• VP8/VP9/AV1 codec support in WebM

Codec String Formats

HEVC (H.265) - ISO/IEC 14496-15

hvc1.{profileSpace}{profileIdc}.{compatibilityFlags}.{tier}{level}.{constraints}

Example: hvc1.2.4.L153.B0

• Profile 2 (Main 10)
• Compatibility: 0x4
• Tier: Low
• Level: 153 (5.1)

AVC (H.264) - ISO/IEC 14496-15

avc1.{profile}{compatibility}{level}

Example: avc1.640028

• Profile: 0x64 (High Profile)
• Compatibility: 0x00
• Level: 0x28 (4.0)

AV1 - AV1 Codec ISO Media File Format

av01.{profile}.{level}{tier}.{bitDepth}

Example: av01.0.01M.08

• Profile: 0 (Main)
• Level: 01 (2.1)
• Tier: M (Main)
• Bit Depth: 08 (8-bit)

VP9 - VP Codec ISO Media File Format

vp09.{profile}.{level}.{bitDepth}.{chroma}.{primaries}.{transfer}.{matrix}.{range}

Example: vp09.02.51.10.01.09.16.09.00

• Profile: 02 (Profile 2, 10-bit)
• Level: 51 (5.1)
• Bit Depth: 10
• Chroma: 01 (4:2:0)
• Primaries: 09 (BT.2020)
• Transfer: 16 (SMPTE 2084 PQ)

Color Space Standards

ITU-T H.273 - Color Identification

Color Primaries

Code	Name	Description
1	bt709	Rec. ITU-R BT.709-6 (HDTV)
9	bt2020	Rec. ITU-R BT.2020-2 (UHDTV)
10	bt2020	Same as 9
12	smpte431	DCI-P3
22	p3	Display P3

Transfer Characteristics

Code	Name	Description
1	bt709	Rec. ITU-R BT.709-6
15	iec61966-2-1	sRGB
16	bt2020-10	BT.2020 10-bit
17	bt2020-12	BT.2020 12-bit
18	pq / smpte2084	SMPTE ST 2084 (HDR10)
20	hlg / arib-std-b67	Hybrid Log-Gamma

Matrix Coefficients

Code	Name	Description
1	bt709	Rec. ITU-R BT.709-6
9	bt2020-ncl	BT.2020 non-constant luminance
10	bt2020-cl	BT.2020 constant luminance

HDR Detection

Movi-Player uses multi-layered HDR detection:

1. Metadata-first: Uses explicit color space values from container
2. 4K Heuristic: For UHD content (≥3840×2160), assumes HDR if metadata missing
3. Profile-based: HEVC Main10 profile indicates 10-bit content

// HDR detection logic
const isHDRTransfer =
  transfer.includes("pq") ||
  transfer.includes("hlg") ||
  transfer.includes("smpte2084") ||
  transfer.includes("arib-std-b67");

const isBT2020 = primaries.includes("bt2020") || primaries.includes("rec2020");

videoTrack.isHDR = isHDRTransfer || isBT2020;

Web Standards

W3C WebCodecs API

• Proper use of VideoDecoder and AudioDecoder interfaces
• Correct codec string format per WebCodecs registry
• Hardware acceleration with software fallback

W3C Web Audio API

• AudioContext for playback (master clock)
• Proper buffer scheduling and timing
• Sample rate conversion handling

W3C Custom Elements v1

• Element name contains hyphen (movi-player)
• Shadow DOM encapsulation
• Lifecycle callbacks (connectedCallback, disconnectedCallback, attributeChangedCallback)
• Observed attributes declaration

WHATWG HTMLMediaElement

Compatible properties:

• src, poster, preload, crossorigin
• paused, ended, currentTime, duration, playbackRate
• play(), pause(), load()
• autoplay, loop, muted, controls, volume

Standards References

Standard	Full Name	Version
ISO/IEC 14496-10	H.264/AVC Video Coding	Edition 11 (2020)
ISO/IEC 14496-12	ISO Base Media File Format	Edition 7 (2022)
ISO/IEC 14496-14	MP4 File Format	Edition 2 (2020)
ISO/IEC 14496-15	Carriage of NAL in ISO	Edition 5 (2022)
ISO/IEC 23008-2	HEVC Video Coding	Edition 3 (2020)
ITU-T H.264	Advanced Video Coding	06/2019
ITU-T H.265	High Efficiency Video Coding	11/2019
ITU-T H.273	Coding-independent code points	12/2016
SMPTE ST 2084	High Dynamic Range EOTF	2014
ARIB STD-B67	Hybrid Log-Gamma (HLG)	2015

Verification

To verify standards compliance:

1. Codec String Validation

   const support = await VideoDecoder.isConfigSupported({
     codec: "hvc1.2.4.L153.B0",
   });

2. Color Space Accuracy

   • Compare against MediaInfo/FFprobe output
   • Verify HDR content displays correctly

3. Container Compatibility

   • Test with standards-compliant MP4/MKV/WebM files
   • Verify against ISO reference software