How to Enable Real-Time Captions for OBS Studio and vMix Streams: POLYV Cloud Recognition
Teams using OBS Studio, vMix, or an in-house streaming tool can now enable POLYV cloud-based real-time captions after sending the stream to a POLYV live channel. This guide covers the workflow, viewing experience, and test checklist.
Many event teams already use OBS Studio or vMix for multi-camera production, presentation slides, opening clips, lower thirds, and on-site footage. They should not need to rebuild that production workflow simply to add captions to a corporate livestream.
*Figure 1: POLYV enterprise live streaming product interface. Actual functions and interface details depend on the product version and project configuration.*
How can a team using OBS Studio or vMix enable real-time captions in a POLYV live room? In short: Send the completed stream from OBS Studio, vMix, or an in-house tool to a POLYV live channel, then enable cloud recognition in the live-room caption settings. The production tool remains responsible for the program feed, while POLYV provides cloud recognition, caption presentation, and the viewing page.
01 / Start with the audience and the viewing context
This update extends cloud caption recognition to third-party and self-developed streaming workflows. It keeps local production and cloud viewing responsibilities separate: the production system creates the feed; the enterprise live platform distributes it and presents captions to viewers.
*Figure 2: POLYV cloud recognition update for real-time captions, available after third-party or in-house streaming tools send a feed to POLYV.*
02 / Keep the production workflow where it belongs
OBS Studio and vMix are third-party streaming and live-production tools. They can combine cameras, presentations, media clips, audio, and visual packaging locally before sending a programme feed to a live channel. They are not POLYV products and should be described as part of the production layer.
This is useful for product launches, employee training, webinars, and long-form sessions where audiences may watch on mobile, without sound, or in a noisy environment.
Before release, run an end-to-end rehearsal with real speakers, terminology, slides, inserted video, background music, network conditions, and desktop and mobile viewing. The test should also define who owns production, the live room, audience support, and the response to an exception.
03 / Configure captions as a viewing aid
After the stream is stable in the POLYV live channel, enable cloud recognition in the real-time caption settings and configure the original language and, where required, translated caption languages. Viewer-side placement and switching can differ by page layout, device, and channel configuration.
Viewers do not need OBS Studio or vMix. They enter the configured POLYV viewing page and use the available caption experience there. Captions can support silent viewing, noisy environments, hearing accessibility, and cross-language comprehension.
*Figure 3: Role separation between third-party production tools, POLYV live streaming, the viewer experience, and operations.*
04 / Put governance and replay into the same workflow
Automated captions are viewing assistance, not a substitute for an approved script, presentation, or human review. Terminology, translated wording, and externally published statements should be reviewed according to the organisation’s own requirements.
*Figure 4: Example views of real-time captions and the related configuration area.*
For sessions with medical, financial, legal, safety, product, or other specialist content, prepare a terminology list, assign in-session monitoring, and review replay, resources, and access permissions before wider distribution. Data and viewing behaviour should be interpreted within the organisation’s own operating process rather than as a direct measure of business intent.
05 / How POLYV supports the delivery chain
POLYV enterprise live streaming can receive the programme feed from OBS Studio, vMix, or an in-house streaming tool and provide cloud distribution, a branded viewing page, real-time captions, interaction, replay, and data capabilities. The platform provides the technical layer; the organisation remains responsible for content, rights, privacy, and approvals.
A practical rollout begins with one representative pilot. Validate the stream, captions, audience devices, interaction, replay, and handoffs, then convert the findings into an event SOP for future sessions.
FAQ
1. Do OBS Studio and vMix generate POLYV captions directly?
No. They are third-party production and streaming tools. POLYV cloud recognition provides captions after the live feed reaches a POLYV channel.
2. Can an in-house streaming tool be used?
It can be assessed when the tool can send a stable stream to the required POLYV channel configuration.
3. What should be tested before going live?
Test real speakers, terminology, slides, inserted videos, background music, network conditions, and both desktop and mobile viewing.
About POLYV
POLYV is an enterprise video SaaS brand. Its core products and services include low-latency live streaming, video on demand, MR live streaming, digital humans and live studios. POLYV provides private video technology and platforms, content operations, and live-streaming operations and execution services for enterprise digital transformation.
Founded in 2013, POLYV has supported six consecutive years of CCTV Spring Festival Gala live streaming. It serves large enterprises and financial institutions including China Everbright Bank, Bank of Ningbo, Kingdee, Tencent, Huawei, iFLYTEK, Midea and NetEase with live video systems and services.