Netflix Delivery Requirements

Understanding Netflix's Delivery Standards

Netflix has become one of the largest acquirers of independent feature films globally, but their delivery requirements are rigorous and unforgiving. Miss a specification, and your film will be rejected during QC—forcing you to remaster, resubmit, and delay your launch window. Carbon Arc Media has delivered multiple feature films directly to Netflix, and we understand exactly what the platform requires at every stage.

Netflix doesn't negotiate on quality. Their platform streams to 200+ million subscribers worldwide across every device from 4K televisions to mobile phones. To maintain that consistency, they enforce strict technical standards, metadata requirements, and quality control processes. Understanding these requirements before you begin post-production can save months of remediation work.

Netflix Technical Specifications Overview

Netflix accepts deliverables in two primary formats: Apple ProRes 422 HQ or IMF (Interoperable Master Format). Most independent producers deliver ProRes because it's simpler, faster, and widely supported. IMF is used primarily by larger studios and is technically more flexible but requires specialized software and expertise.

Video Specifications

Codec and Container Requirements

For ProRes delivery, Netflix requires:

• Video Codec: Apple ProRes 422 HQ (not ProRes RAW, not ProRes Proxy)
• Container: MOV or MP4 file format
• Resolution: 1920 x 1080 (Full HD) or 3840 x 2160 (4K UHD)—not both. Choose one master resolution.
• Frame Rate: 23.976 fps (cinema standard), 24 fps, 25 fps (PAL), 29.97 fps (NTSC), or 59.94 fps. Most independent films use 23.976 fps.
• Color Space: Rec. 709 (for HD) or Rec. 2020 (for 4K)
• Bit Depth: 10-bit or 8-bit (10-bit preferred for 4K)

Aspect Ratio and Safe Areas

Netflix allows multiple aspect ratios—16:9 (most common), 2.35:1 (cinema scope), 4:3, or even 1:1 for creative content. However, your video file must be letterboxed to 1920x1080 (or 3840x2160 for 4K). The actual image content sits within that frame with black bars, and Netflix strictly monitors the safe area. All essential action and text must remain within the center 1.85:1 area to ensure visibility on all playback devices.

Audio Specifications

Audio Tracks and Metadata

Netflix requires a complete audio package:

• Primary Audio: Stereo (2.0) or 5.1 surround required. If your film has Dolby Atmos, it must accompany a 5.1 mix, not replace it.
• Codec: AC-3 (Dolby Digital), E-AC-3 (Dolby Digital Plus), or AAC
• Sample Rate: 48 kHz
• Bit Rate: 192 kbps (stereo) or 384 kbps (5.1 surround)
• Loudness Standard: Netflix requires LKFS (Loudness, K-weighted, Relative to Full Scale) loudness measured at -24 LKFS ±2. Most independent films measure -27 to -31 LKFS—above Netflix's target. Your mixer must remix and re-measure to meet this standard.

Subtitle and Caption Tracks

Netflix requires subtitles in English (if the original audio is English) plus any other languages you plan to deliver. Subtitles must be burned into the video file or delivered as separate SRT files. If delivering separate subtitle files, each language gets its own file with strict formatting rules (no more than two lines per subtitle, 42 characters max per line, proper encoding as UTF-8). Closed captions (for hearing-impaired viewers) are required for the primary audio track in English-speaking territories.

Metadata and Delivery Requirements

File Naming and Organization

Netflix is extremely particular about file naming. Files must follow their naming convention exactly:

[Title]_[Version]_[Type].[ext]

Example: MyFilm_FINAL_ProRes422HQ_Stereo_EN.mov

Deviation from this naming convention—even a single character out of place—will cause the file to fail automated ingestion, and Netflix QC will reject it before even checking video quality.

Metadata Submission

Beyond the video file itself, Netflix requires a detailed metadata package:

• Title, original title (if different), and alternate titles
• Synopsis (short 150-character version and long 500+ character version)
• Genre classification (Netflix uses specific genre tags)
• Release date and production company information
• Cast and crew credits (director, writers, producers, main cast)
• Content rating (G, PG, PG-13, R, NC-17 in the US; equivalent rating systems for other territories)
• Runtime in seconds (format: HH:MM:SS)
• IMDb ID and additional identifier information

Quality Control (QC) Process

Netflix's Automated and Manual QC

Netflix uses both automated systems and human reviewers. Automated QC scans for technical violations: audio loudness, video codec compliance, frame rate, resolution, file integrity. Manual QC involves Netflix technicians watching the film in its entirety on multiple playback devices, checking for color accuracy, audio sync, subtitle/caption readability, and overall presentation.

If your film fails automated QC, Netflix will send a detailed rejection report listing every violation. You then have a fixed window (usually 10 business days) to fix the issues and resubmit. If you miss the window, you may have to restart the entire submission process.

Pre-Delivery QC: Your Responsibility

Before submitting to Netflix, you should perform your own rigorous QC:

• Use a loudness measurement tool (e.g., Dolby Media Composer, iZotope RX, or Adobe Audition) to verify LKFS precisely.
• Play the file on multiple devices: laptop, 4K television, smartphone, tablet. Does the image scale correctly? Are subtitles readable?
• Check frame rate by opening the file in MediaInfo or similar tool. Confirm it matches your specified frame rate.
• Verify color: Export a short test clip from your color grading software and compare it to the final ProRes master. Does the color match?
• Check for black frames or audio dropouts by reviewing the file timeline in a video editor.

The Netflix Submission Timeline

Netflix operates on strict delivery windows. Once your film is acquired, you'll receive a delivery schedule specifying the exact date by which all materials must be submitted. This typically allows 6–12 weeks from acquisition date. Missing the deadline pushes your release window forward by months.

To hit the deadline reliably, you need to begin the mastering and delivery process immediately after acquisition, ideally with a dedicated delivery manager overseeing every step. Assuming no major revisions are required, the timeline typically breaks down as follows:

• Weeks 1–2: Finalize color grading and obtain Netflix-approved color grading report. Deliver final DCP or reference file to mixer.
• Weeks 2–4: Mix and remix audio to Netflix's -24 LKFS standard, create Dolby Atmos mix if applicable, generate final audio stems.
• Weeks 4–6: Master all video deliverables (ProRes 422 HQ at both HD and 4K if required), create subtitle and caption files in all required languages.
• Weeks 6–8: QC all materials in-house, compile metadata, prepare delivery package.
• Weeks 8–10: Submit to Netflix, monitor for QC feedback, make any required corrections.
• Weeks 10–12: Final sign-off and archive storage.

Why Producers Need Delivery Expertise

Netflix's specifications are complex and non-intuitive to producers unfamiliar with the platform. A single oversight—a misidentified color space, a loudness measurement error, a malformed subtitle file—can trigger the entire delivery to be rejected and sent back for remediation. When that happens, you're not just resubmitting a file; you're potentially remixing audio, re-grading video, or hiring additional technicians to fix the error, all while the delivery window ticks down.

This is where complete delivery management becomes essential. A delivery manager with Netflix experience knows the common pitfalls, can conduct pre-delivery QC that mimics Netflix's process, and can coordinate with your colorist, mixer, and mastering house to ensure all materials meet spec before they ever reach Netflix's inbox.

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