If OBS shows a black screen while you stream a prerecorded file, first find out whether the picture is missing in the active scene, the Media Source, the OBS output, or only on YouTube. A black preview points you back into OBS; a correct preview and local recording with a black YouTube picture point later in the path.
For a local video file, start with OBS’s Media Source, then check the scene, visibility, layer order and canvas position before changing encoder or computer settings. No single cause explains every black screen, so compare what you can see at each stage.
Start with the scene that is actually live
OBS sends the selected scene, not whichever scene you last edited. If you have a scene for a holding image, a test clip and the 24/7 programme, it is easy to inspect one while sending another. Begin by looking at the scene list and identifying the scene selected for the broadcast. Then inspect its preview: does it contain the video you expect, or is it already black there?
If the preview is black, do not begin by changing YouTube settings. You have not yet established that OBS is producing the intended picture. Open the active scene’s Sources list and check whether the local file appears there as a Media Source. OBS describes Media Sources as a way to add audio and video files to a scene in its Sources Guide.
A useful test is to switch deliberately to the intended scene and watch the preview for a moment. If the picture appears, the problem was at least partly a scene-selection mismatch. If it remains blank, continue inside that scene. Avoid deleting and rebuilding several scenes at once: doing so can remove the evidence that would show where the mismatch started.
If you have configured OBS for a long-running broadcast, distinguish the scene that is on air from the scene intended for a later segment. A playlist or scene-switching arrangement can make this less obvious. The article on scheduling a YouTube Live playlist to resume from the next video covers that separate continuity problem; here, the immediate question is simply whether the scene currently selected contains the picture you mean to send.
Check the Media Source and file playback
A prerecorded file on your computer does not need a display capture or capture card just to appear in OBS. In the intended scene, use a Media Source for the video or audio file. Display Capture is for showing a screen, while window, game and video-capture sources represent different capture paths. Those alternatives may be appropriate for other content, but they add capture-specific questions that do not help diagnose a file placed directly in a scene.
Select the Media Source and check that it points to the intended file. A renamed, moved or substituted file can leave the source unable to show the content you expect. Check the path and filename rather than assuming that a source with the right label still refers to the right media. If you keep a test clip and a programme file in separate folders, make sure you have selected the programme file rather than an empty or unrelated test asset.
Next, observe playback. Is the source active, and does the picture advance? A still first frame may be expected if playback has not begun or if the clip is paused; a black frame that persists has several possible explanations. The source and file need to be investigated before concluding that the problem is an encoder setting. If sound is audible while the picture is missing, that is useful evidence that part of the media path is active, but it does not identify a single cause or prove that the file itself is sound.
Keep the test controlled. Use the same scene and source, allow the clip to play, and watch the OBS preview. If you change the selected file, scene, visibility and encoding settings together, you may get a picture back without learning what failed. For a stream that uses a sequence of recordings, it is also worth separating file playback from loop behaviour: how to set OBS to restart a recorded lesson playlist after the last video addresses what should happen at the end of a playlist, rather than whether its current file can render.
Check visibility and what sits above the source
A source can be present in the scene yet not visible in the composition. In the Sources list, check the Media Source’s visibility control. OBS’s Sources Guide documents the eye control for showing or hiding a source. If visibility is off, turn it on and see whether the preview changes before adjusting anything else.
Then inspect the order of the sources. OBS layers sources in the order shown in the list: a source higher in the list appears above one below it and can cover it. A full-canvas image, colour source, logo panel or other media source might therefore obscure the video even though the file is playing. Temporarily hide the sources above the Media Source one at a time. If the video appears when one is hidden, you have located the layer that covers it; decide whether that layer belongs in the final composition before changing its order or visibility.
This is different from a source being disabled. A visible source may still be fully obscured, and a source at the top may itself be blank. Test the composition rather than judging only by the icons in the list. If you hide an overlay as a diagnostic, note its original state and restore it if it is meant to be part of the broadcast.
For a devotional channel, for example, the video could be beneath a full-screen title card intended for a starting scene. For a study channel, it could sit under a background image added during an earlier layout change. These examples do not imply that either source type is faulty: they illustrate why source order and visibility are separate checks from playback.
Check position, size and crop on the canvas
If the source is visible and not covered, check where it is placed. Select the Media Source in the preview and inspect its outline or transform. The source may be off the visible canvas, scaled very small, or cropped until the useful part is outside the frame. OBS documents source transforms and cropping in its Sources Guide; the important diagnostic is whether the selected source’s visible bounds overlap the canvas viewers will receive.
Look at the preview canvas as a whole. If the outline is far outside the canvas, move the source back into view. If it occupies only a small area, check its scale. If the outline seems to fill the canvas but its picture is absent, consider whether a crop or transform has removed the content. Make one adjustment at a time and check the preview after each change. This helps distinguish a placement issue from a source that is not rendering at all.
Canvas proportions can contribute to confusion. A widescreen file placed in a differently shaped canvas may leave unused space, but empty margins are not the same as an entirely black picture. If you are unsure what size and shape to expect, see the guide to video aspect ratios for YouTube Live streaming. Use it to understand framing, not as evidence that changing aspect ratio will cure every blank preview.
Cropping can also be intentional: you may want to remove letterboxing or frame an artwork. During troubleshooting, temporarily test whether the full source can be seen without that crop, then restore the intended framing if it is not the cause. Avoid resizing repeatedly by eye without noting what changed. The test is whether the image becomes visible on the canvas, not whether the layout is finished.
Confirm that OBS is rendering a picture
The preview is the first boundary to check. If it remains black after verifying the active scene, file playback, visibility, stacking and transform, the problem is still on the OBS side of the comparison. That does not prove whether the issue is the file, the source state or rendering; it gives you a narrower place to investigate than the YouTube dashboard.
Make a short local recording while the intended file is playing, then review it. You are checking whether OBS produces a picture in its recorded output, not creating a replacement broadcast. If the recording is black as well as the preview, YouTube has not yet been shown to be the point where the image disappears. Return to the scene and Media Source checks, and consult OBS’s logs if you need evidence about what happened when the source was loaded. Do not label the file incompatible on the basis of a black screen alone.
If the preview looks correct but the local recording does not, the discrepancy is later than basic scene composition. Check that you recorded the intended output and scene, then inspect OBS’s output and encoder state. Keep a note of exactly which view is black. “OBS works” is too broad a conclusion if the preview and recording disagree.
A multi-GPU laptop is not a reason to reassign graphics settings automatically for a local Media Source. OBS’s older laptop guidance discusses GPU assignment for particular display, game and window capture cases, as well as browser rendering. Those are distinct paths from playing a local file as a Media Source. Only investigate that guidance if your actual setup uses one of the capture methods it addresses; it does not establish GPU reassignment as a general fix for prerecorded-file playback.
Compare OBS with YouTube’s live preview
Once the OBS preview and a local recording show the intended picture, check what arrives at YouTube. Look at the live preview in YouTube Studio while the stream is active. YouTube advises checking the picture and sound in the encoder, reviewing the local archive, and then investigating the outbound connection if the encoder output looks healthy in its live-stream troubleshooting guidance.
Use the comparison to locate the boundary, not to guess at a setting:
| OBS preview | Local recording | YouTube live preview | What the comparison suggests |
|---|---|---|---|
| Black | Black | Black or unavailable | The picture is missing before or within OBS output; revisit scene, source and playback. |
| Correct | Black | Not yet useful | Check that the recording captured the intended output, then investigate OBS output and encoder settings. |
| Correct | Correct | Black or missing | The scene is rendering locally; investigate the encoder’s stream output, YouTube’s dashboard and the connection. |
| Correct | Correct | Correct | The picture is reaching YouTube; any remaining issue may be intermittent or limited to a different scene or time. |
These are diagnostic inferences from comparing outputs, not a claim that every setup will fit neatly in one row. YouTube Studio may report encoder errors or stream health warnings. Read the message shown for your broadcast and compare it with what OBS reports rather than treating every warning as proof of a black-screen cause.
If YouTube shows a picture for a short time and then loses it, record when the change occurs and whether OBS preview and local recording change at the same time. This separates a source that stops playing from a picture that fails later in delivery. If the stream itself stops rather than continuing with a blank picture, that is a different symptom; the guide to OBS stopping its YouTube stream after a few hours covers that separate failure pattern.
If the picture disappears after OBS
When OBS preview and the local recording are both sound but YouTube’s live view is blank, inspect the stream output rather than rebuilding the scene first. Check OBS’s encoder status and YouTube Studio’s stream health or reported encoder errors. YouTube’s guidance also recommends keeping encoder software current, checking CPU load and testing outbound Internet strength when the encoder’s own picture and sound are correct.
These checks help distinguish a locally rendered picture from a stream that is not being delivered as expected. A connection problem can affect delivery even when the file and preview are fine; a reported encoder problem may point to output settings or load. Neither observation identifies a universal remedy, so use the actual dashboard and encoder messages for the stream in question.
YouTube recommends generating a new stream key in the specific circumstance where a third-party encoder reports an error starting the stream. Do not rotate keys simply because a local Media Source preview is black: a stream key is not a control for scene visibility, source order or canvas placement. Follow the instructions on YouTube’s current official page if the dashboard or encoder points to a key/startup issue.
A useful handover note, if someone else helps with the channel, includes the active scene, whether the Media Source advances, what the OBS preview shows, what the local recording shows, and the YouTube dashboard message. This gives the next person evidence instead of a vague report that “the stream is black”. For an always-on channel, make such checks with a short test or planned maintenance window where possible, so a diagnostic change does not leave the main programme in an unintended state.
If the repeated work of leaving a computer on, checking playback and restoring a dropped broadcast is the operational burden you are trying to remove, StreamNeo turns an uploaded video into a YouTube live stream that continues with your computer switched off and can be monitored and restarted if it drops. That changes how the broadcast is operated; it does not determine why an OBS Media Source showed black in the first place.
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FAQ
Why can I hear the file but see a black picture in OBS?
Audio and video can follow different parts of the source and output path, so audible sound does not prove the picture is rendering. Check that the right file is selected and advancing, then inspect source visibility, layers and canvas position. Compare a local recording before deciding where the picture disappears.
Do I need a capture card to play a prerecorded file in OBS?
No. OBS’s Media Source is intended for adding audio and video files to a scene. A capture source is for a different input, such as a display, application or external video device, and introduces different checks.
Should I change GPU settings to fix a black Media Source?
Not as a first step. OBS’s laptop guidance covers particular display, game and window capture situations, not a general remedy for a local file played through a Media Source. Check the scene and source path first, and use GPU-specific troubleshooting only if your setup matches the capture case described.
When should I look at YouTube Studio instead of OBS?
Start with OBS if its preview is black. If the preview and a local recording both show the right picture but YouTube does not, inspect the encoder output, YouTube’s reported errors, CPU load and outbound connection. That comparison narrows the fault location; it does not guarantee a particular fix.