Astra Streaming Studio can send a live feed to YouTube over RTMP, but the available documentation does not confirm that the app can create a 9:16 output. Treat the connection as a way to send video to YouTube, then verify the incoming format and preview in YouTube Studio before relying on it for a vertical audience.
For a genuine vertical presentation, use YouTube’s documented vertical layout or its encoder dual-stream workflow only if your setup can provide the required format and stream key. Do not assume an Astra broadcast will appear in the Shorts feed; the app listing and the setup walkthrough do not establish that result.
Confirm which Astra app you are using
This guide refers to Astra Streaming Studio, the Android app published by MIV Dev, rather than another product that happens to use the Astra name. Its Google Play listing describes H.264/AAC encoding, RTMP and RTMPS streaming, and live camera or screen capture. Those capabilities make a conventional RTMP connection plausible, but they are not a detailed guide to YouTube’s vertical streaming workflow.
The listing does not document a portrait canvas, a 9:16 output switch, a dedicated vertical stream-key field, or compatibility with YouTube’s encoder-based dual-stream mode. That distinction matters: being able to send an RTMP feed does not by itself mean the app can produce every format YouTube accepts. No end-to-end test is established by the documentation considered here, so confirm the result in your own YouTube Studio session.
Before you begin, check that the installed app is the same Astra Streaming Studio listing and that its current controls match what you see here. App screens can change. The independent Android-to-YouTube walkthrough gives a useful outline—obtain YouTube’s server address and stream key, enter them in Astra, choose RTMP, and start—but treat it as procedural corroboration rather than proof of current app behaviour.
Also confirm that the YouTube channel can go live. YouTube’s live-streaming guidance says channels need verification and must not have a live-streaming restriction in the preceding 90 days; the minimum age for live streaming is 16. These are YouTube’s current eligibility rules, which can change, so check the official page if Studio blocks setup or your account situation is unclear.
If this is intended to become a long-running channel rather than a one-off test, first decide whether a phone-based broadcast is appropriate for the duration. A phone is useful for a short, live camera session, while a prepared video loop has different file and restart considerations; our guide to organising podcast files for an always-on stream covers the sort of preparation that helps prevent avoidable interruptions.
Prepare the vertical video and broadcast
Decide what “vertical” needs to mean for your viewers before configuring the app. A portrait source may be composed natively in 9:16, or it may be a landscape scene cropped to a tall window. Those are not equivalent. A crop can remove people, captions, product details, or devotional artwork near the edges, even if the preview technically fills a phone screen.
If you are using a camera or screen capture, check what Astra captures and how the phone is held before going live. A screen designed for landscape may leave essential labels outside a portrait crop. A camera shot may need the subject nearer the centre. For a recorded video, inspect the actual file on a phone and note whether it is portrait or landscape; do not infer the orientation from the thumbnail or file name.
YouTube documents several ways to handle vertical viewing. In Live Control Room, a stream can use a simultaneous horizontal 16:9 and vertical 9:16 presentation. YouTube says the vertical version defaults to a centre crop, with other layout choices including fit to phone width and stacked. You can edit the layout before going live and, when you created the stream through the editing canvas, adjust it during the broadcast. This is YouTube’s documented layout behaviour, not a confirmed Astra control.
If you need both a landscape view for desktop and television viewers and a vertical view for mobile viewers, consider YouTube’s dual-format options before starting. YouTube’s encoder route uses RTMP(S) and a second stream key for the vertical feed, and the encoder must send the matching format to each key. YouTube says the vertical format cannot be added after the stream has started. An app that offers a single RTMP destination may not provide the necessary second feed, so do not plan on adding it later.
For a single portrait-oriented audience, still check the output YouTube receives rather than relying on source dimensions alone. The phone might encode or frame a source differently from what you expected. Make a private or otherwise controlled test if appropriate for your channel, and do not announce a public start until the incoming preview shows the intended composition.
Prepare the scene around the narrow frame: keep faces, text, instruments, and the important part of the image away from the far left and right. If you are testing a landscape source with a vertical crop, check both sides of the crop on the YouTube preview. For a looped information screen, use large text with sufficient spacing; a line that fits a full-width landscape frame can become unreadable when clipped or scaled for a phone.
Enter YouTube ingest details in the app
Open YouTube Studio’s Live Control Room and create or select the live event you intend to use. Studio supplies the current ingest or server address and a private stream key for that session. Copy the values from the live setup currently on screen; do not reuse a key from an old tutorial or guess a server address from memory.
In Astra Streaming Studio, look for the stream destination or configuration controls. The independent walkthrough describes entering YouTube’s server address and stream key, selecting RTMP, and then starting the configured stream. The exact labels may differ in the installed app version. If you see RTMP and RTMPS options, follow the protocol and details provided for your YouTube setup rather than choosing a protocol at random.
Treat the stream key as a password. Do not paste it into a public chat, send it in a screenshot, or include it in a message to someone who does not need access. If it is exposed, use YouTube Studio’s controls to replace it, then update the configured destination. A leaked key can let another person send a feed to your event, so protecting it is part of preparing the broadcast, not an optional housekeeping task.
Before you leave the configuration screen, check that there are no stray spaces or missing characters in the copied fields. A connection error is often easier to diagnose by comparing the current Studio values with the app fields than by repeatedly starting and stopping the stream. If Astra lets you save a destination, give it a clear name that identifies the channel or test, but avoid putting the private key into any visible name.
Do not assume that the presence of an RTMP field means Astra can connect simultaneously to two YouTube keys. YouTube’s encoder-based dual-stream instructions describe a second key for vertical output; the available Astra listing does not establish that the app can send that second feed. If dual presentation is essential, confirm the required output and key handling in the app before choosing it as the encoder.
For other encoder settings, keep format and bandwidth decisions separate from the orientation question. A frame can be the right shape and still look poor if the bitrate is unsuitable for its resolution or motion. Our YouTube bitrate guide for 1080p 50fps loops is relevant when you are planning those settings, but its subject is bitrate, not Astra’s vertical-output capability.
Start the stream and inspect YouTube Studio
Once the destination is configured, start the broadcast from Astra and return to Live Control Room. Wait for YouTube to report an incoming feed and show its preview or status. The crucial check is not merely that Astra says it is streaming; it is that YouTube receives the expected feed and displays the intended image and orientation.
Keep the event private or unlisted while you are checking, if that suits the purpose and settings of your channel. Verify the right event is open, the feed is moving, audio is present if needed, and the key scene is framed correctly. If the Studio preview is absent or stuck, do not share the viewing URL as if the broadcast were ready. Confirm the server address and key, then look for a clear connection status before retrying.
For vertical delivery, inspect whether Studio presents a vertical preview or the vertical layout you configured. A landscape preview, or an image with the sides cropped unexpectedly, is a reason to stop and adjust before you tell viewers to join. The existence of a working RTMP connection proves only that video is arriving; it does not prove that YouTube has a vertical version for the intended audience.
YouTube says viewers in the mobile Shorts feed see the vertical version of a dual-format stream, while other viewers see the horizontal version. The same live URL and chat are shared. That description belongs to YouTube’s vertical-live feature; it is not a promise that any vertical-looking RTMP broadcast, including one sent by Astra, will be placed in the Shorts feed.
When a vertical presentation matters, use YouTube’s own current instructions to choose between its Live Control Room layout and an encoder dual-stream setup. The first offers documented crop and layout choices within YouTube’s canvas. The second requires the encoder to prepare and send the formats to their respective keys before the event starts. Choose based on what your source and encoder can actually deliver, then verify the Studio preview.
Check the vertical preview before sharing
Make the preview check a release gate. Compare what you intended to show with what Studio receives: the subject should remain inside the portrait frame, any text should be legible, and the image should not be rotated or unexpectedly cropped. If you cannot see or confirm a vertical version in Studio, do not tell viewers that the broadcast is ready for vertical viewing.
A centre crop is especially easy to misread when planning from a landscape source. Imagine a product demonstration filmed across a table: tools placed near either edge may disappear in the vertical version. A devotional scene with singers spread across the frame may lose a person or instrument. For these cases, a native portrait composition or a deliberate stacked layout may serve viewers better than hoping a crop retains everything.
Check the viewing experience on a phone as well as the Studio monitor when you can. Confirm that the portrait area is useful at the size a viewer will see, not just in a small preview pane. YouTube’s vertical and horizontal presentations share the URL and chat, but features differ. Its help page notes that vertical lives support memberships, while clickable links in chat or the channel description, pre-roll or mid-roll live ads, and 4K bitrate streaming on the YouTube app are not supported for vertical lives. Decide whether any of those limits matter to your channel before selecting the format.
YouTube also reports combined metrics in Live Control Room, while vertical-only metrics become available 24 hours later. Do not use the absence of an immediate vertical-only report as evidence that the feed failed. For the immediate operational decision—whether the picture is arriving in the desired orientation—use the live preview and stream status.
If you plan a long-running video loop, orientation is only one part of the reliability plan. A computer or phone that must stay awake, connected, and actively broadcasting can be a point of failure overnight. Our article on keeping a stream running from a spare PC explains the trade-offs of a local machine; for a prepared file workflow, StreamNeo can remove the need to leave your own computer running, but that does not change YouTube’s format requirements or verify vertical placement for you.
Troubleshoot framing and orientation
If the image is sideways, first distinguish source rotation from output layout. Check how the phone or camera was held, whether the captured video itself is portrait, and whether the player or YouTube preview is rotating it. Do not change multiple settings at once; make one correction, restart the test if necessary, and look again at the feed YouTube receives.
If the image is upright but too wide, it may be a landscape feed displayed within a portrait viewing area or a vertical crop that has not been configured as expected. Check the Live Control Room layout and the available crop options. YouTube documents centre crop, fit to phone width, and stacked layouts for its editing canvas. These controls are in YouTube’s workflow; the Astra listing does not confirm equivalent controls inside Astra.
If important content is cut off, move it towards the centre or recompose the source in portrait. Avoid shrinking everything until text is unreadable just to retain the full landscape frame. Fit-to-phone-width may preserve more of the source but can change the screen area it occupies; stacked can show more than one view, but is a different composition. Preview each option with the actual content rather than choosing from its name.
If YouTube does not receive the stream, compare the current key and server details in Studio with the Astra configuration. Confirm that the selected protocol matches the destination instructions and that the channel is eligible to go live. Avoid sharing the key while asking for help; describe the error and app screen without exposing the credential. A fresh test after correcting a field is more useful than repeatedly restarting with unchanged values.
If a vertical feed is absent from a dual-stream setup, check whether the second key and matching vertical output were configured before the broadcast started. YouTube says the vertical format cannot be added after a stream has begun. If Astra exposes only one destination and the documentation does not establish support for a second feed, do not infer that an additional key can be made to work by pasting it into the same field. Revisit the encoder choice or use YouTube’s documented Live Control Room approach.
Choose the route that fits the audience
There are two distinct goals: making one portrait presentation, or serving both portrait and landscape viewers. A phone-originated RTMP feed may suit a straightforward live camera session if YouTube Studio confirms the format. If you need both formats, the extra setup is material: a YouTube canvas layout can manage a dual presentation within YouTube’s documented controls, while its encoder route requires the two feeds and keys to be configured before going live.
| Need | Practical route to consider | Check before sharing |
|---|---|---|
| Portrait-only viewing | Prepare a portrait source and send the feed, then inspect Studio | Confirm upright image, useful crop, and a vertical preview |
| Portrait and landscape audiences | Use YouTube’s documented Live Control Room layout where it suits the source | Confirm both presentations and note which layout is active |
| Encoder-generated dual output | Use a compatible encoder workflow configured before broadcast | Confirm both stream keys and matching formats before starting |
The table is a decision aid, not a claim that Astra supports every route in it. Astra’s documented RTMP and RTMPS support is a useful starting point for a standard connection. Its documented listing does not settle whether it can generate a portrait canvas or send the second feed required by YouTube’s encoder path. If the requirement is a verified 9:16 presentation, make that verification part of your app selection and test plan.
For a channel that also serves desktop or television viewers, decide whether a centre crop removes too much of the scene. For a local news loop, for example, the presenter may remain visible while a ticker or map at the edge disappears. A portrait-first composition can solve that framing problem, but it may not preserve the landscape experience. The format should follow what viewers need to see, not simply the phone’s orientation.
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FAQ
Can Astra Streaming Studio stream vertical video to YouTube?
The app listing confirms RTMP and RTMPS streaming, but the material reviewed here does not confirm a 9:16 output control or YouTube vertical dual-stream support. Send a test and inspect the incoming preview and vertical layout in YouTube Studio before relying on the result.
Will an Astra stream appear in the YouTube Shorts feed?
That is not established by the Astra app listing or the independent setup walkthrough, so do not promise it. YouTube describes Shorts-feed viewing for its vertical-live workflow; verify the vertical version in Studio and consult YouTube’s current help before promoting the event that way.
Can I add the vertical stream after going live?
YouTube says its encoder-based vertical format cannot be added after a stream has started. Configure the required vertical feed and second key before the broadcast, or choose a Live Control Room layout that fits your source.
What should I check if the preview is cropped or sideways?
Check the source orientation, phone or camera position, and YouTube’s selected layout one at a time. Keep essential people and text within the portrait area, then inspect the updated preview before sharing the live URL.