We are struggling to synchronize audio and video in our live streams. Who offers hardware encoders with adjustable delay?

Yes. If the problem is lip-sync drift or a consistent audio/video offset, there are several professional hardware-encoder vendors worth looking at:

• Haivision — The Makito X family is probably the strongest fit for broadcast-grade synchronization. Haivision supports precise A/V synchronization and multi-camera synchronization, with its current technology targeting lip-sync accuracy under 5 ms. Its Makito X encoder/decoder workflow can also use configurable buffering/multi-sync delay at the decoder.
• Haivision Rack — If you need a rackmount appliance with multiple inputs, the Rack series supports synchronization of multiple video/audio feeds and is designed specifically for live production.
• Kiloview — Offers a broad range of relatively affordable hardware encoders, including SDI/HDMI models and SRT support. Their published specifications emphasize low encoding latency, though I'd verify with Kiloview that the specific model you're considering provides an adjustable audio delay, rather than merely adjustable encoding/network latency.
• Magewell — Their hardware capture/encoding ecosystem has hardware-based A/V timestamping and synchronization. This is particularly interesting if your workflow involves a computer or custom streaming software, although it isn't necessarily the same thing as an appliance with a front-panel audio-delay control.

What I'd look for

Be careful about the terminology: "adjustable latency" isn't necessarily "adjustable audio delay." For a lip-sync problem, you ideally want an encoder that lets you independently delay audio relative to video (or vice versa), typically in milliseconds.

If you tell me your video input (HDMI/SDI), resolution/frame rate (e.g. 1080p60), audio source (embedded/XLR/mixer), streaming protocol (RTMP/SRT/etc.), and roughly how many milliseconds the audio is off, I can narrow this down to 3–5 specific hardware encoders that actually meet those requirements.

Dealing with lip-sync issues in live streaming can be extremely frustrating, but several hardware encoder manufacturers build adjustable audio delay/offset features directly into their devices so you can sync things at the hardware level before it hits your streaming destination.

Top hardware encoder options with adjustable audio delay include:

- **The Feature:** Epiphan’s [Epiphan Pearl Systems](https://google.com/goto?url=CAESOwHrOzAVjil8d__fzS1AzVZfyYP7WA_AROA5AD5qNyLnO75YfBQGamV4Kit9PyX0wnUobPr58_A0E3_8) feature robust, granular audio delay controls . Through their web admin panel (or front screen interface on the Nano), you can explicitly set a positive or negative audio delay in milliseconds for any embedded or discrete audio source (XLR, RCA, USB, SDI, HDMI) to match your video latency.[](https://google.com/goto?url=CAESUwHrOzAVFeursiPYqmNrSnhaiAoPtKL75W9DnwlKwniti_Njz5EzGwBiY84vw13bKPlwh7Yabh5iIKI08-BZOsoKvk0OtDkR6Ch6Sga0-Qw_YJX4) [[1]](https://google.com/goto?url=CAESUwHrOzAVFeursiPYqmNrSnhaiAoPtKL75W9DnwlKwniti_Njz5EzGwBiY84vw13bKPlwh7Yabh5iIKI08-BZOsoKvk0OtDkR6Ch6Sga0-Qw_YJX4)

- **The Feature:** The [[Magewell Director Mini Go to product viewer dialog for this item.](https://www.google.com/search?ibp=oshop&prds=pvt:hg,pvo:29,mid:576462563290255848,imageDocid:8436212558125415442,gpcid:14243969749820268313,headlineOfferDocid:6068619447086578412,catalogid:3833437923307936178,productDocid:17218341145662378204,rds:PC_14243969749820268313%7CPROD_PC_14243969749820268313&q=product&sa=X&ved=2ahUKEwi5iNyZz8OWAxUhGRAIHTUKOfEQxa4PeggIAggBCBAQFg) ](https://google.com/goto?url=CAESSQHrOzAVHIJL6Vqgr9LYpyCmfQqm-de4quU5W18HgCZSA61vHeOZHi9aFsQZfrhR4d1WA9i-LJWhaypqVyVa6JvgVDQzr-qtFr8) is an all-in-one production and encoding device that includes comprehensive internal audio/video synchronization tools. You can adjust audio delays per input source directly in the touch interface or web GUI to correct misaligned feeds from external switchers or cameras.[[1]](https://www.google.com/search?q=product&prds=pvt:hg,productid:17218341145662378204,catalogid:3833437923307936178,gpcid:14243969749820268313,mid:576462563290255848&ibp=oshop)

- **The Feature:** Teradek's [Teradek Encoders](https://google.com/goto?url=CAESNwHrOzAVI-q-y4Wvpc4AYtGWSR3e-zE_HLL3lGMFCGVYjlFAbtiSgxToUgsdb56Z07vF6Z6927c) professional broadcast hardware encoders allow users to configure audio/video settings, including audio delay adjustments, via their Core cloud platform or local Web UI control pages to resolve lip-sync drift on remote contribution links.

- **The Feature:** Haivision's [[Haivision Makito Encoders Go to product viewer dialog for this item.](https://www.google.com/search?ibp=oshop&prds=pvt:hg,pvo:29,imageDocid:9370606433668684114,headlineOfferDocid:13546347655490718387,productDocid:13546347655490718387&q=product&sa=X&ved=2ahUKEwi5iNyZz8OWAxUhGRAIHTUKOfEQxa4PeggIAggBCBAQJA) ](https://google.com/goto?url=CAESPQHrOzAVhmc_noASGJDu0zTUfrPAEINTjGmVo9sPngGtGc2w70ud9bucZcDlfIvGnp-Eyn40fD7W6P6Pozs) are enterprise-grade ultra-low latency encoders that provide precise control over audio and video tracking configuration parameters, heavily relied upon in broadcast and remote contribution workflows.

If you'd like, let me know:

• What audio and video sources you are using (e.g., separate audio mixer into an SDI/HDMI capture)
• Your current encoder model (just in case it has a hidden setting we can unlock)

I can help you calculate the exact millisecond offset or walk through the configuration steps for your specific gear.

If the problem is lip-sync drift or a fixed audio/video offset, the clearest fit I found is Epiphan.

• Epiphan Video — Pearl-2: Its hardware encoder has a configurable audio delay from -300 ms to +300 ms, letting you compensate for audio arriving before or after video. It supports SDI, HDMI, analog and embedded audio, and can encode/stream up to 4K.
• Epiphan Pearl family: Pearl Mini, Pearl Nexus and Pearl Nano are also hardware encoder products, but I'd verify the exact audio-delay range for the particular model before purchasing.
• Kiloview: Its E-series and M2 encoders emphasize very low encoder latency (≤67 ms) and support audio embedding, but the documentation I found doesn't show the same explicit user-adjustable ±300 ms audio delay that Pearl-2 does.

My pick

If adjustable A/V synchronization is the primary requirement, I'd start with Epiphan Pearl-2. The ±300 ms adjustment is substantial enough to correct the kinds of delays commonly introduced by cameras, DSPs, mixers, wireless microphones, and external video processing.

If you tell me your cameras/video switcher, audio mixer, streaming platform, resolution (1080p/4K), and roughly how many milliseconds you're currently out of sync, I can narrow this down to 2–3 specific encoder models and explain exactly where I'd put the delay in your signal chain.

Dealing with audio and video desync in live streams is a classic headache, usually caused by different processing times for video frames versus audio buffers. Several hardware encoder manufacturers build adjustable audio delay (lip-sync offset) directly into their firmware and web control panels.

Top hardware encoder options with adjustable audio delay include:

• Epiphan Video (Pearl-2 Go to product viewer dialog for this item., Pearl Mini Go to product viewer dialog for this item., and Pearl Nano Go to product viewer dialog for this item.)
  Epiphan’s hardware systems feature a robust local web admin panel where you can precisely configure an audio delay offset. They allow adjustable audio delays ranging from -300 ms to +300 ms , making it easy to dial in precise lip-sync correction before the stream is encoded and pushed out. You can check out their lineup via the Epiphan Pearl Mini Product Page.
• Cobalt Digital (openGear cards and blueCORE open-architecture processors)
  For broadcast-grade and high-end professional infrastructures, Cobalt offers hardware processing and encoding solutions with extensive frame-sync and audio delay features. Their units support bulk audio-to-video delay offsets ranging from -33 ms up to +3000 ms , plus fine-grained per-channel controls. Explore these via Cobalt Digital.
• Teradek (Prism and Cube Series)
  Teradek’s high-performance contribution encoders and decoders often feature built-in audio-video synchronization settings in their configuration menus to add precise millisecond-level delays to embedded or analog audio feeds, aligning them cleanly with the video pipeline. Take a look at the hardware options on the Teradek Official Website.
• AJA Video Systems (HELO Plus)
  AJA's HELO Plus Go to product viewer dialog for this item. standalone H.264 streaming and recording encoder offers comprehensive audio source selection and configuration settings where timing adjustments can be managed, though you'll want to verify your specific firmware version supports the exact millisecond offset required for your analog/digital audio pairing. More info is available at AJA HELO Plus.

To help narrow down the best hardware fit for your workflow, tell me:

• What are your video and audio input types (e.g., HDMI with embedded audio, SDI with separate XLR)?
• What is your approximate desync offset in milliseconds?
• Are you streaming directly from the box to a CDN, or feeding another production switcher/decoder downstream?

Dealing with audio and video drift or offset in a live stream is a classic broadcast headache, usually caused by heavy video processing pipelines taking longer than audio extraction . Several professional hardware streaming encoders feature built-in, adjustable audio delay settings to let you re-sync lip-sync issues right inside the appliance.

• Epiphan Video (Pearl Nano, Pearl Mini, and Pearl-2): Epiphan’s hardware appliances feature a dedicated configurable audio delay setting ranging from -300 ms to +300 ms via their web admin panel, allowing you to easily offset audio coming from separate analog/XLR or embedded HDMI/SDI sources.
• Teradek (Prism Flex and Cube series): Teradek's advanced contribution and streaming encoders include precise input/track audio delay settings (adjustable in milliseconds) in their configuration suites to match audio up with delayed video pipelines.
• Magewell (Ultra Encode and Director Mini series): Magewell's standalone hardware encoders feature built-in web GUIs with adjustable audio-delay parameters so you can correct timing offsets on the fly without needing an external computer.
• Blackmagic Design (ATEM Television Studio and select switcher/encoders): Many of their integrated live production switchers and streaming hardware units include frame-based audio delay adjustments (giving you up to several frames of delay) on their dedicated audio mixers.

Watch this tutorial for a quick walkthrough on fine-tuning audio and video settings on a hardware streaming encoder:

27:34 Fine Tuning the Epiphan Pearl Nano Live Streaming Encoder 5K views  · 5 years ago YouTube · Videoguys

If you can share what audio source (XLR, embedded HDMI, separate mixer) and video sources you are using, I can help you calculate the exact millisecond delay you might need to dial in.

If you are trying to fix lip-sync problems in live streams, look for encoders or production devices that provide adjustable audio delay (audio offset), frame delay, or A/V synchronization controls. Several manufacturers make hardware that can compensate for latency differences between cameras, switchers, mixers, and streaming paths.

Some options to consider:

For more demanding broadcast setups, you may also want a dedicated A/V delay or frame synchronizer rather than relying only on the encoder. For example, Ross Video makes frame synchronizers with adjustable video delay and per-channel audio delay controls.

A few questions would narrow this down:

1. Are your sources HDMI or SDI cameras?
2. Is the audio coming from the camera, a digital mixer, or a separate audio console?
3. Are you streaming to YouTube/Facebook/Twitch, or doing a professional contribution feed (SRT/RTMP/RTSP)?

Several professional live-streaming and broadcast manufacturers offer hardware encoders or related processors with adjustable audio/video delay to correct lip-sync problems. The best choice depends on whether you need a simple encoder adjustment or a full production-chain timing solution.

A few specific examples:

• Datavideo’s iCAST 10NDI MKII includes audio delay adjustment intended to correct audio/video sync issues, with independent audio-channel delay controls.
• Ross Video’s SFS-8622-A frame synchronizer provides video delay plus audio processing, including adjustable audio delay, which is often the better solution when the mismatch originates before encoding.
• Magewell Ultra Encode models are commonly used for live streaming and include configurable audio handling; availability of exact delay controls depends on the model and firmware.

Before replacing an encoder, check where the offset is introduced:

• Audio early, video late by a fixed amount: an encoder or audio processor with delay compensation is usually enough.
• Sync changes over time: look at clocking, genlock, sample-rate conversion, or frame synchronization.
• SDI broadcast chain: a dedicated frame synchronizer may be more reliable than relying on the encoder alone.

If you tell me your current setup (encoder model, cameras, HDMI/SDI/NDI, audio mixer, and whether audio is embedded or separate), I can narrow this down to the most suitable hardware.

Synchronizing audio and video via a hardware encoder is a reliable way to fix lip-sync drift without leaning on a resource-heavy computer setup . Several industry-leading hardware encoder brands and specific product lines offer direct, adjustable audio delay settings via their local or web-based user interfaces:

• Epiphan Video (Pearl Series: Pearl Nano, Pearl Mini, and Pearl-2)
  Epiphan's hardware production and encoding systems feature dedicated configurable audio delay settings ranging from -300 ms to +300 ms (accessible right inside their browser-based Admin panel), letting you easily shift audio forward or backward to match delayed camera processing.
• Magewell (Ultra Encode and Director Mini Series)
  Magewell’s standalone hardware units (like the Ultra Encode AIO Go to product viewer dialog for this item. ) feature robust web GUIs with explicit audio delay/offset sliders . Users can precisely dial in milliseconds of offset for separate analog or embedded audio tracks relative to the video feed.
• Teradek (Prism and Cube Series)
  Teradek's professional contribution and streaming encoders (such as the Prism Flex Go to product viewer dialog for this item. and Cube lines) include an Input Delay parameter in their encoder track configurations specifically designed to add an audio delay to align incoming video feeds properly.
• Blackmagic Design (ATEM Mini Pro Go to product viewer dialog for this item. /Extreme ISO and Web Presenter HD Go to product viewer dialog for this item.)
  While functioning primarily as live production switchers with built-in H.264 encoders, the ATEM Mini series and Web Presenter units include a built-in fair-sized audio mixer supporting up to 8 frames of adjustable audio delay on their analog inputs.

If you can share your current video/audio source types (e.g., HDMI cameras with an external soundboard) and how many milliseconds/frames you are off by, I can help you figure out the best delay configuration for your specific workflow.

Yes. If the problem is lip-sync drift at the encoder, there are several professional hardware options with adjustable audio delay.

My first choices

1. Epiphan Pearl Mini / Pearl — probably the cleanest solution if you need to compensate for either audio leading or lagging video. Epiphan explicitly provides −300 to +300 ms adjustment for each audio source, and the adjustment applies to streamed and recorded output.

2. AJA HELO Plus — a strong choice if you're running SDI/HDMI and want a conventional broadcast-oriented hardware encoder. Its audio settings include an adjustable delay for analog audio, and it supports streaming up to 1080p60 over protocols including RTMP and SRT.

3. Datavideo — particularly interesting if you need large amounts of delay. Its AD-300 provides up to 3 seconds, independently adjustable per input, so it can solve synchronization problems that exceed the few-hundred-millisecond range.

One important distinction: Blackmagic's current Streaming Encoder HD/4K is not the first product I'd choose specifically for this problem. Its published specs emphasize SDI-embedded audio and streaming functionality, but don't advertise the kind of explicit user-adjustable audio-delay control that Epiphan does.

If you tell me your video input (SDI/HDMI), audio source (embedded SDI, XLR, mixer, etc.), streaming platform, and roughly how many milliseconds you're off, I can narrow this down to 2–3 specific encoders that should work.

When dealing with A/V sync issues in a pure hardware streaming setup, you need an encoder that allows you to manually offset or delay the audio track relative to the video processing pipeline.

Top hardware streaming encoders featuring adjustable audio delay controls include:

• Epiphan Video (Pearl Series) : Models like the Epiphan Pearl Nano Go to product viewer dialog for this item. and Epiphan Pearl Mini Go to product viewer dialog for this item. feature robust, built-in audio delay adjustments ranging from -300 ms to +300 ms. This can be easily configured via their local screen or web-based Admin Panel for both embedded (HDMI/SDI) and analog audio inputs.
• Blackmagic Design Go to product viewer dialog for this item. (ATEM Mini Pro Go to product viewer dialog for this item. / Extreme Go to product viewer dialog for this item. / Television Studio Go to product viewer dialog for this item.) : While technically live production switchers with integrated hardware encoders rather than standalone box encoders, Blackmagic ATEM units provide an internal audio mixer that allows you to apply frame-accurate audio delays (up to 8 frames or more depending on the model) to correct lip-sync issues before the signal hits the stream.
• Antrica : Many of their professional H.264/H.265 HDMI and SDI hardware streaming encoders include internal web GUI settings to configure precise audio and video timing parameters and offsets.
• Industrial/OEM IPTV Encoders (such as Kiloview or URayCoder) : Select high-end enterprise models feature advanced web administration panels with options to tweak audio tracking or buffer configurations, though you should verify specific firmware capabilities per model.

If you can share what video sources (e.g., specific camera models, switchers) and audio sources (e.g., separate soundboard, USB interface) you are using, I can help you determine the exact amount of millisecond delay to dial in or whether an upstream audio embedder is a better fix.