Codec & Spec Reference

A quick-reference for common delivery codecs, frame rates, audio levels, and color spaces. Use this page when you need to pick the right format for a deliverable or confirm a spec.


Delivery Codec Reference

Apple ProRes Family

CodecData Rate (1080p24)Use Case
ProRes Proxy~45 Mb/sOffline edit, rough cuts — not for reference QTs or deliverables
ProRes 422 LT~102 Mb/sLightweight masters, reference QTs, dailies
ProRes 422~147 Mb/sReference QTs, lower-end masters
ProRes 422 HQ~220 Mb/sStandard broadcast master, intermediate renders
ProRes 4444~330 Mb/sVFX, titles with alpha, high-quality masters
ProRes 4444 XQ~500 Mb/sHDR and high-bit-depth sources

Avid DNxHD / DNxHR

CodecData Rate (1080p24)Use Case
DNxHD 3636 Mb/sOffline edit
DNxHD 115115 Mb/sLightweight master
DNxHD 175175 Mb/sBroadcast master (8-bit)
DNxHD 175x175 Mb/sBroadcast master (10-bit)
DNxHR LBVariableOffline edit, UHD
DNxHR SQVariableBroadcast master, UHD
DNxHR HQXVariableHigh-quality master, UHD, 10-bit
DNxHR 444VariableVFX, alpha, high-quality master

Delivery Format Recommendations

Delivery TargetRecommended Codec
Netflix / Prime Video streaming masterProRes 422 HQ or IMF package
Broadcast master (US)ProRes 422 HQ or DNxHD 175x
Film festival (DCP)Separate DCP mastering; ProRes 4444 XQ as intermediate
YouTube upload referenceProRes 422 or H.264 high-bitrate
VFX plate / pullProRes 4444 or EXR sequences
Titles / graphics with alphaProRes 4444
Temp screenerProRes 422 LT or H.264

Frame Rate Reference

Common Frame Rates

Frame RateNotationCommon Use
23.97623.98 / 24 NTSCFeature-style documentary, streaming, US cinema
24.00024pTrue cinema, some festival deliveries
25.00025pPAL territories, European broadcast
29.9730 NTSC / 30iUS broadcast legacy (drop frame)
30.00030pSome streaming, corporate
50.00050pPAL slow-motion, European sports
59.9460 NTSCUS broadcast sports, high-motion
60.00060pWeb, some streaming
120.000120pSlow-motion source footage

Drop Frame vs Non-Drop Frame

  • Drop frame (DF): TC notation uses semicolons 01;00;00;00
  • Non-drop frame (NDF): TC notation uses colons 01:00:00:00
  • Drop frame applies only to 29.97 and 59.94 fps, and only compensates for the 0.1% offset between 30.000 and 29.97
  • Use drop frame for US broadcast at 29.97 and 59.94
  • Use non-drop frame for streaming and 23.976
  • PAL and 25/50 fps don’t use drop frame at all

Audio Reference Levels

Reference Tone

StandardLevelRegion / Use
SMPTE RP 200-20 dBFSUS broadcast
EBU R68-18 dBFSEuropean broadcast (pre-R128)
EBU R128-23 LUFS integratedModern European broadcast, loudness-normalized
AES Streaming Reference-20 dBFS (tone) / -24 LUFS (content)Most streaming platforms

Loudness Targets

PlatformIntegrated LoudnessTrue Peak
Netflix-27 LKFS ±2-2 dBTP
Prime Video-24 LKFS-2 dBTP
Apple TV+-24 LKFS-2 dBTP
US broadcast (CALM)-24 LKFS ±2-2 dBTP
EBU broadcast-23 LUFS ±1-1 dBTP
YouTube-14 LUFS (platform normalizes)-1 dBTP

Loudness is managed by the sound mix, not typically in online/conform. But the mix team needs to know the target before they deliver, so confirm with the spec.


Color Space Reference

Working & Delivery Color Spaces

Color SpaceGamutTransferCommon Use
Rec.709BT.709Gamma 2.4HD / SDR delivery
sRGBBT.709sRGB / gamma 2.2Web, monitors
P3 D65DCI-P3Gamma 2.6Cinema
Rec.2020 PQBT.2020PQ (ST 2084)HDR10 streaming
Rec.2020 HLGBT.2020HLGHDR broadcast
Dolby VisionBT.2020PQ with dynamic metadataPremium streaming

HDR Flavors

FormatPeak NitsMetadata
HDR101000–4000Static (per title)
HDR10+1000–10000Dynamic (per scene)
Dolby Vision1000–10000Dynamic (per frame)
HLGVariableNone (broadcast-friendly)

When to Flag HDR on a Turnover

  • If any source footage was shot in a log / RAW format intended for HDR finishing
  • If the delivery spec specifies HDR
  • If the project uses wide-gamut color (P3 or BT.2020 working space)

Include in the slate and turnover notes:

  • Working color space
  • Delivery color space
  • Whether the reference QT is Rec.709 (typical) or HDR

Resolution Reference

Common Delivery Resolutions

NameResolutionAspect
HD 1080p1920 × 108016:9
2K DCI2048 × 1080~17:9
UHD 4K3840 × 216016:9
4K DCI4096 × 2160~17:9
UHD 8K7680 × 432016:9

Cinematic Aspect Ratios

RatioNameUse
1.78:116:9HD / UHD broadcast & streaming
1.85:1Flat / Academy FlatCinema flat
2.39:1Scope / CinemaScopeCinema widescreen
2.00:1UnivisiumMany streaming originals
1.33:14:3 AcademyArchival, stylized

Bit Depth & Chroma Subsampling

NotationMeaning
4:4:4Full chroma resolution — every pixel has its own color
4:2:2Half chroma resolution horizontally — broadcast standard
4:2:0Quarter chroma resolution — streaming / web compression
8-bit256 values per channel — sufficient for SDR broadcast
10-bit1024 values per channel — HDR, gradient-heavy content
12-bit4096 values per channel — DI, color finishing, premium HDR
16-bit / floatVFX, compositing, high-bit-depth workflows

Sample Rate & Bit Depth (Audio)

AttributeStandard
Sample Rate48 kHz (always, for picture work)
Bit Depth24-bit (common) or 16-bit (acceptable for final mix delivery)
Channel Config — StereoL, R
Channel Config — 5.1L, R, C, LFE, Ls, Rs
Channel Config — 7.1L, R, C, LFE, Lss, Rss, Lsr, Rsr
Channel Config — Atmos (delivery)7.1.4 bed + dynamic objects (ADM BWF)

Quick Spec Summary Card

For a typical US streaming documentary turnover:

  • Resolution: UHD 3840 × 2160 (or HD 1920 × 1080)
  • Frame Rate: 23.976 fps
  • Timecode: Non-drop frame
  • Codec (master): ProRes 422 HQ
  • Codec (reference): ProRes 422 LT
  • Color Space (SDR): Rec.709 / Gamma 2.4
  • Color Space (HDR): Rec.2020 PQ
  • Audio Sample Rate: 48 kHz
  • Audio Bit Depth: 24-bit
  • Audio Reference Tone: -20 dBFS / 1 kHz
  • Loudness Target: -24 to -27 LKFS (platform dependent)
  • Start TC: 01:00:00:00 (episode 1)

Always confirm with the specific delivery spec before export — numbers above are common starting points, not guarantees.