Best Bitrate Settings for Your Aitum Vertical Stream

Quick Answer

• There are no official recommended bitrate settings for Aitum vertical streams, so creators rely on user-tested configurations.
• Multistreaming setups often use bitrates between 6k CBR and 10k for horizontal streams running alongside vertical streams.
• Creators targeting Instagram use settings like 6000kbps at 1080p 30fps, though actual OBS event logs show bitrates can drop significantly lower.
• For high-quality tasks, users utilize AV1 encoding with settings like CQP 18 for YouTube and 31k bitrate for Replay Buffer.

Current Status of Aitum Vertical Bitrate Guidelines

At present, there are no specific technical details or official recommendations outlining the definitive “best” bitrate settings for Aitum vertical streams. Creators looking for a concrete, one-size-fits-all number directly from official documentation will find a distinct gap. The platform provides the necessary tools to handle the vertical layout alongside a traditional horizontal broadcast, but it stops short of prescribing exact data rates for the vertical encoder.

Because an official baseline does not exist, the current knowledge base relies entirely on user-reported bitrate configurations and independent community tests. Streamers are actively experimenting with their own hardware setups and network constraints to determine what yields the clearest image on mobile-first platforms. This decentralized, trial-and-error approach means that the available configuration data comes straight from the field rather than a standardized technical manual.

For those configuring their vertical canvas, this lack of official guidance necessitates a hands-on approach to optimization. You cannot simply input an officially endorsed value and guarantee flawless quality. Instead, establishing your baseline requires analyzing the user-reported tests currently circulating among creators, running personal stream tests, and monitoring network stability under a dual-stream load.

This reliance on community experimentation highlights a common reality in specialized broadcast setups: while the software seamlessly handles the routing and formatting of the vertical canvas, the actual encoding data rates remain highly variable. By reviewing the configurations other users have successfully tested, you can establish a practical starting point for your own broadcast. Until official technical guidelines are formally published, matching your own output against these user-reported benchmarks remains the only viable strategy for locking in a sharp, reliable vertical feed.

User Configurations for Multistreaming

Real-world setups routinely push hardware capabilities to their limits when balancing multiple platforms and aspect ratios simultaneously. One active configuration involves running four concurrent outputs: two horizontal broadcasts routed to Twitch and YouTube pushing a robust 10k bitrate, paired with two dedicated vertical streams aimed directly at TikTok and YouTube Shorts. This specific quad-stream approach demands significant bandwidth and precise encoder allocation. Handling simultaneous horizontal and vertical canvases forces the system to render distinct scenes and aspect ratios in real time, making the 10k bitrate target a heavy lift for both the local network and the graphics card processing the composite feeds.

When raw upload speed or platform limitations become a bottleneck, broadcasters must adjust their scaling and bitrate targets accordingly. Another tested configuration focuses on bandwidth efficiency by rescaling the output before it hits the ingest server. In this specific setup, the user rescaled the streams to 1080p, applying a Constant Bitrate (CBR) of 6k exclusively for the main Twitch stream.

Using a 6k CBR at a 1080p resolution directly aligns with Twitch’s standard ingest constraints, ensuring stable frame delivery and preventing the broadcast from buffering on the viewer’s end during high-motion segments. Pushing a 10k bitrate to platforms like YouTube while restricting Twitch to a rescaled 1080p output at 6k CBR requires splitting encoder duties. This ensures that destinations capable of handling higher bitrates receive the maximum possible quality, while heavily capped platforms receive a highly optimized, stable feed without wasting processing overhead.

AV1 Encoding and Replay Buffer Settings

Balancing AV1 encoding between live broadcasts and local highlight captures requires distinct rate control strategies. When pushing video to platforms that support modern codecs, visual fidelity takes priority over strict bandwidth limitations. For instance, testing an AV1 stream sent to YouTube shows strong results when utilizing a Constant Quantization Parameter (CQP) of 18.

Using CQP instead of a traditional constant bitrate forces the encoder to target a specific baseline quality rather than a fixed data limit. A CQP of 18 delivers near-lossless visual clarity, allocating more data during high-motion scenes and conserving data during static moments. This method maximizes AV1’s advanced compression efficiency, ensuring the YouTube ingest servers receive a pristine feed without unnecessary artifacting.

For local highlight captures, the Replay Buffer operates under different constraints. Creators use this feature to retroactively save short clips of notable moments without filling their storage drives with hours of continuous recording. Because these files write directly to local disk rather than traversing a network, the bandwidth ceiling is significantly higher. Running the Replay Buffer enabled using AV1 at a 31k bitrate ensures these captured moments are exceptionally sharp. Pushing the data rate to 31,000 kbps eliminates macroblocking in fast-paced action, securing flawless source material for subsequent video editing.

Working with high-bitrate AV1 files guarantees maximum quality, but it places a heavy demand on post-production workflows. Much like handling other highly compressed modern codecs, dropping these robust files onto an editing timeline requires capable hardware decoding. If your editing software drags when processing these densely packed clips, the underlying hardware acceleration bottlenecks are often identical to those detailed in [verify exact details with official documentation].

Bitrate Behaviors for Instagram Vertical Streams

Configuring your encoder for vertical platforms does not guarantee the ingest server will respect your local settings. There is a severe, documented disconnect between the target bitrates defined in broadcasting software and what Instagram actually processes during a live stream.

Consider a specific configuration attempt: a broadcaster set their stream quality to 1080p at 30fps with a strict target bitrate of 6000 kbps. On paper, this provides a standard baseline for high-definition video. The local network was more than equipped to handle this outbound load, featuring a confirmed internet upload speed of 30 Mbps. This overhead means the local connection had plenty of capacity, eliminating local bandwidth throttling as the bottleneck.

However, the actual streaming behavior completely ignored these user-defined parameters. During the broadcast to Instagram, the OBS event log recorded the actual video bitrate plummeting to a dismal 246 kbps.

This massive drop—from a requested 6000 kbps down to just 246 kbps—demonstrates how aggressively Instagram can throttle incoming data streams. When a 1080p video feed is starved to this extreme degree, the resulting visual output degrades into heavy pixelation. The encoder is forced to compress millions of pixels per second using a fraction of the necessary bandwidth.

This behavior highlights a critical friction point in vertical broadcasting. You cannot brute-force stream quality simply by raising your target bitrate or relying on a fast local connection. If the platform restricts the ingest handshake, it will forcefully downgrade the output regardless of the 30 Mbps upload capacity at your disposal. The OBS event log remains the only reliable metric for diagnosing this reality, proving that the 6000 kbps you enter into your software is often treated as an easily discarded suggestion rather than a hard rule.

References

• Aitum Vertical Plugin for OBS 29+ - StreamerSquare
• Aitum Vertical | Page 8 | OBS Forums
• Aitum Multistream | OBS Forums
• Aitum Vertical | Page 2 | OBS Forums