To stream vertical video continuously from a VPS, prepare a 9:16 feed and send it to YouTube with a compatible encoder and the correct vertical stream key. You can instead send a horizontal feed and configure YouTube to create a vertical view, but its default centre crop may not frame your subject as intended.
The important distinction is who shapes the portrait picture: your encoder, or YouTube’s layout tools. Neither choice removes the need to configure the format before going live, protect your stream key, and test the VPS and connection with your actual source.
Choose a direct vertical feed or a YouTube-created view
A native vertical feed is encoded as portrait video, usually with a 9:16 frame such as 1080 by 1920 pixels. Your encoder decides what occupies that frame. This suits a portrait recording, a graphic designed for phones, or a scene where you want deliberate control over what viewers see. Check that any titles and important details remain clear on a small screen.
A second route is to send a horizontal feed and use YouTube’s simultaneous horizontal and vertical streaming setup. In this arrangement, YouTube creates a vertical view from the horizontal source. The default vertical view is a centre crop; the Live Control Room layout canvas also offers options such as fitting the picture to phone width or stacking content. These choices can help with a wide scene, but they cannot recover detail that was outside the source frame.
| Approach | What you send | Framing control | Useful when |
|---|---|---|---|
| Direct vertical | A portrait 9:16 feed to the vertical key | Your source and encoder define the frame | Your programme is designed for phones |
| YouTube-created vertical view | A horizontal feed, with vertical output configured in Live Control Room | YouTube applies the selected crop or layout | You want a horizontal programme and a mobile-oriented view |
YouTube says vertical live streams offer a full-screen mobile experience and can be discovered as viewers browse YouTube Shorts. Its Help comparison also distinguishes some features available to horizontal viewers from those available to vertical viewers. For example, YouTube lists clickable links, live pre- and mid-roll ads, premieres, live redirect and 4K broadcast among horizontal features, while memberships and gifted memberships are listed for both. Check the current YouTube Help guidance on vertical live streams before choosing a format around a particular feature.
Prepare a 9:16 source and output
Start with the picture rather than the command line. Decide which parts of the source need to remain visible in portrait: a person, a devotional image, a lyric line, a news ticker, or the key area of a study display. A wide video can be cropped to portrait, but a crop removes much of the left and right edges. If the entire wide scene matters, a YouTube-created layout may be more suitable than forcing the whole scene into a narrow crop.
For a file-based channel, inspect the source dimensions and aspect ratio before building a playlist. A mixed collection may contain landscape clips, square artwork, or portrait recordings. Decide whether to crop, add margins, or prepare a separate portrait version for each type. Avoid letting an encoder silently stretch a landscape picture into a tall frame; circles become ovals and people look distorted. For orientation problems, this guide to fixing a rotated or sideways YouTube stream is relevant when the source metadata or camera orientation is the cause.
Set the output dimensions and frame rate to values supported by your source and encoder, and check YouTube’s current guidance rather than assuming a particular setting is required. Matching the source frame rate can avoid unnecessary conversion. If you resize or crop, preview the result and check the edges, text and subject placement. A technically valid portrait frame can still be a poor viewing experience if captions are too small or a face is cut off.
For audio, confirm that the source contains the intended track and that the output includes it. A silent devotional loop may be intentional, while a news or study programme may rely on speech. The YouTube Live API can report health issues such as no audio stream, low video bitrate or a frame-rate mismatch; a clean-looking picture alone does not prove the full stream is healthy.
Configure the vertical format before going live
In YouTube Studio’s Live Control Room, create or schedule the stream and choose the third-party encoder route that supports vertical output. Configure the vertical format before your encoder starts sending. YouTube warns that you cannot add the vertical format after a stream has started, so do not treat it as a setting to repair halfway through a broadcast.
If you are using a horizontal-origin dual output, inspect the vertical layout canvas before the event. Try the centre crop, fit-to-phone-width, or stacked layout against the actual programme. A centre crop may work well for a single speaker placed in the middle; it can lose a ticker placed at the edge. A stacked layout can retain separate elements, but it changes their relative size. Check legibility on a phone-sized preview instead of judging only from a desktop monitor.
A scheduled rehearsal is useful even if the final programme is a loop. Confirm that the chosen stream type, vertical format, title, privacy setting and start procedure match your plan. YouTube’s live-streaming eligibility guidance says a channel must be verified and free of live-streaming restrictions during the preceding 90 days. Check the official eligibility and live-streaming guidance for the current requirements before relying on a channel that has not streamed recently.
Set up the encoder and VPS input
The basic VPS pipeline has three parts: a media source the VPS can read, an encoder or muxer that produces a live output, and the ingestion destination supplied by YouTube. The source might be a local file, a playlist, or a live input. A continuous file programme also needs a deliberate repeat strategy. Replaying a file and keeping the broadcast process alive are separate jobs; a loop option by itself does not establish that an interrupted network connection will recover or that playback will resume where you expect.
FFmpeg can read a file, transform it to the target dimensions and encode or copy compatible streams into an RTMP(S) output. The exact command depends on whether you are cropping, resizing, transcoding audio, or passing through streams that already match the target. Treat sample commands found elsewhere as starting points, not a reliability guarantee. Test the actual input, output format and network path first. For mixed-format playlists, the advice on skipping FFmpeg playlist items with different resolutions can help you think through one common source inconsistency.
YouTube’s technical guide describes RTMPS as RTMP carried through an SSL connection. For RTMPS, the protocol, valid ingestion endpoint and application path must match YouTube’s supplied details; the connection uses port 443 and requires the hostname to be provided through SNI. Do not guess an endpoint from an old script or copy one from an unrelated service. Follow the values shown in YouTube Studio or its documentation, and see the YouTube Live Streaming API RTMPS guide for the connection requirements.
A VPS is not automatically the right place to transcode every source. If the media already has suitable dimensions, frame rate and codecs, the workload differs from one that must scale, crop, encode video and resample audio continuously. CPU capacity, network allowance, region, process recovery and operating support all matter. There is no universal VPS size established by YouTube’s documentation, and a provider’s advertised specification does not establish how your particular encode will behave over a long run.
Use the matching stream key for each format
In YouTube’s documented third-party encoder path for dual output, use RTMP(S), obtain the separate vertical stream key, and match each output format to its corresponding key. A horizontal output sent to the vertical key, or the reverse, can leave the Control Room waiting for the expected feed or produce an incorrect setup. Check the format-to-key assignment before starting the encoder, especially if your workflow has saved settings from an earlier stream.
Treat each stream key as a password. Retrieve the current values from YouTube Studio or the relevant API workflow, and keep them out of screenshots, public command examples, shared logs, source repositories and support messages. If a key is exposed, replace it through YouTube’s controls rather than assuming nobody will use it. Keep the script readable by storing credentials separately from the part that defines input, encoding and output behaviour.
The Live Streaming API describes stream resources with ingestion details, resolution, frame rate and status or health information. That is useful context for an automated setup, but it does not make the key interchangeable between formats. A practical checklist is to note which output is portrait, which key it uses, and which YouTube preview should show it. Do this without writing the actual key into the checklist.
Choose a VPS around the workload
Estimate the outbound data your stream will use from its bitrate and the hours it runs, then compare that requirement with the provider’s transfer terms. Include both feeds if you are sending horizontal and vertical outputs independently. Leave room for other traffic and check whether the plan limits sustained transfer, not just the headline network rate. Your actual viewer-side delivery is handled by YouTube, but the VPS still has to sustain its upload to the ingestion point.
Then consider whether the VPS encodes or merely passes through media, how many outputs it produces, whether the source is local or fetched over the network, and what happens after a process or connection fails. Check the available CPU or encoding capacity against a rehearsal of your workload. Compare region, support response, operating-system familiarity, backups, monitoring access and total current cost. A plan that is adequate for a low-complexity file loop may be unsuitable for real-time compositing or multiple transcodes.
Long-run reliability is a system design question, not a property implied by renting a VPS. You need to know whether the encoder exits on an input error, whether a supervisor restarts it, whether restart behaviour creates a new YouTube connection cleanly, and how you learn that the stream is down. A process restarting does not necessarily restore the broadcast at the right point or resolve a network issue. If a stream drops overnight, you want logs and an alert that help identify whether the source, encode, host or connection failed. This guide to FFmpeg disconnects on a Mumbai VPS covers a related troubleshooting situation, but your own provider and route still need testing.
Test preview and stream health before starting
Start with an unlisted or otherwise appropriate rehearsal. Watch the YouTube preview and a separate playback device if available. Check that portrait content is upright, the intended subject remains in frame, text is readable, audio is present at a sensible level, and the encoder reports the output format you configured. For connection errors, compare the selected key and encoder details with YouTube’s Control Room; this article on YouTube showing no encoder connected after a key is used addresses a symptom that can result from mismatched or incomplete setup.
Look at stream health rather than relying only on the preview appearing. The API’s health information can flag problems such as low video bitrate, frame-rate mismatch or absent audio. Those signals do not replace watching the picture and sound, but they can point to faults a quick visual check misses. Make a brief checklist for the person responsible for the channel: confirm the right format is live, check the audio, verify the preview and know where to see status if the encoder stops.
Test the failure path as well as the happy path. A rehearsal can reveal what happens when the source ends, the process stops, the VPS loses connectivity, or the encoder is restarted. Do not assume a loop flag, a system service or an application reconnect option handles all of these cases. Document which component should be checked first and how to bring the broadcast back without exposing the key. A deliberately observed test is more useful than discovering the behaviour during an overnight stream.
Check playback framing during the continuous stream
Once live, view the stream as a viewer would on a phone and, if you serve both formats, on a wider screen too. Confirm that the portrait feed remains portrait, the important area has not shifted, and any overlay stays inside the visible frame. A fixed file loop can still expose a poor crop, an unexpected transition, black padding or text placed too close to an edge. Verify the first pass and revisit after source changes.
YouTube describes one go-live notification, a shared stream URL and the same chat for the horizontal and vertical versions in its simultaneous-stream setup. That means viewers need not be directed to separate chats for each format. The Help page says vertical-only metrics become available after 24 hours; use that information to evaluate whether the portrait presentation is serving your audience, rather than inferring it from the number of people visible at one moment.
Keep a simple operating record: start time, selected format, source version, any alerts, and whether a recovery action was needed. If you change the source or encoding settings, repeat the rehearsal. For a file archive or scheduled playlist, make sure the programme itself is intended to repeat and that any music or visuals are appropriate for the channel; technical continuity is not a substitute for editorial review.
Before committing, compare the operating options on the pricing page. When the file and channel are ready, start free — 24-hour trial, no card.
FAQ
How do I stream a vertical video on YouTube Live?
Configure vertical output in Live Control Room before the stream starts, then send a portrait feed with the matching vertical stream key. If you want a horizontal-origin vertical view instead, configure YouTube’s layout and test how it crops or arranges the source.
Can I loop a video on a YouTube livestream from a VPS?
You can configure an encoder workflow to replay a file, but replaying the source is not the same as recovering from a failed process or network connection. Test the loop, end-of-file behaviour and restart procedure with your chosen input before relying on it continuously.
How do I stream 9:16 video to YouTube with FFmpeg?
Prepare a portrait source or define the crop and resize that produce a 9:16 output, then send it to the YouTube ingestion details and vertical key for the configured format. Exact FFmpeg options depend on the source and whether it needs transcoding; rehearse and inspect YouTube’s preview and health status.
What VPS size do I need for a continuous vertical stream?
There is no universally suitable size: the answer depends on whether you transcode, the number of outputs, the source, bitrate, transfer terms and recovery design. Test the intended workload and compare sustained capacity and support with your actual operating needs.