An RTMP 404 from OBS is a reason to check the ingest settings, not proof of one particular fault. Compare OBS with the current Stream URL and separate stream key shown for the exact broadcast in YouTube Studio’s Live Control Room, then check the selected protocol and the status YouTube reports.
The address and key work as a pair for the intended stream. If you chose RTMPS, retrieve its own URL from Live Control Room rather than assuming the ordinary RTMP address is interchangeable. Follow the steps below in order, making one change at a time so you can see what affects the result.
What an RTMP 404 does—and does not—mean
An HTTP-style status code in an encoder error can sound conclusive, but YouTube’s published help does not define an OBS “RTMP 404” as a unique diagnosis. The wording alone does not establish that the key is wrong, that the server address is invalid, or that YouTube has rejected the broadcast for a specific account or channel reason. Treat it as a symptom to investigate, not an explanation.
Start with the values OBS is actually using: its server or URL field, its separate key field, and the protocol selected in the stream settings. Those should match the settings for the intended broadcast in Live Control Room. Next, start the encoder and look for an incoming preview and any health or error message in YouTube’s dashboard. The precise encoder message and YouTube’s own status are more useful than guessing from the number alone.
Avoid changing several things at once. If you replace the address, key and protocol together, a successful connection will not show which value was mismatched; if the failure continues, you will have made the next comparison harder. Note the current settings, verify them against the broadcast, and correct only a difference you can identify.
This is a configuration check, not a claim that every 404 has the same remedy. Other encoder or stream errors may need their own investigation after the address, key and protocol have been compared. YouTube’s live streaming error messages page explains that the dashboard presents stream health and errors; use its message as evidence alongside OBS’s report.
Open the matching stream in Live Control Room
Open YouTube Studio and enter Live Control Room for the scheduled or current stream you mean to start. If you have more than one broadcast, check its title and status before copying anything. A URL or key from a different broadcast may look plausible in OBS, but visual plausibility is not verification. The practical test is whether the values in the encoder match the settings of the intended stream.
Find the stream settings and keep that page open while you inspect OBS. YouTube’s guide to managing live stream settings describes the Stream URL and stream key settings. The encoder setup instructions likewise tell you to copy the URL into the encoder and enter the key separately. Copy from this broadcast’s current settings, not from an old note, an unrelated tutorial, or another channel’s example.
If the broadcast is scheduled, make sure you are looking at the settings for that scheduled event rather than a different stream or an older setup. If you are creating or selecting another stream, return to its own Live Control Room before copying its values. Avoid sharing screenshots or messages that expose the stream key: anyone with access to a live key may be able to send a feed using it.
For a channel intended to run continuously, separating a configuration error from a long-running reliability problem matters. This address check is useful before investigating why a stream later stops, as in the steps described in fixing a church YouTube live stream that stops after a few hours. A connection that never appears in preview calls for a different next step from a broadcast that connects and then drops hours later.
Compare OBS server URL with Stream URL
In OBS, open the stream settings and identify the server or URL field. Compare it directly with the Stream URL displayed for the same broadcast in Live Control Room. YouTube describes that URL as the destination the encoder sends the stream feed to. Copying the displayed value avoids errors caused by a hand-typed address, a leftover value from a prior setup, or a copied example that was never meant for this stream.
| What you are comparing | What to check | What to do if it differs |
|---|---|---|
| OBS server or URL | Does it match the current Stream URL for this broadcast? | Copy the displayed Stream URL into OBS and save the setting. |
| OBS stream key | Is it the key shown for this same broadcast? | Copy the current key into the separate key field. |
| Protocol selection | Does it agree with the address type you intend to use? | Select the intended protocol and use the corresponding URL. |
| Live Control Room status | Is there an incoming preview or a displayed error? | Use the dashboard message to guide the next check. |
Check the complete value rather than only its beginning. A server field that starts with a familiar-looking YouTube address can still differ from the current URL in other characters. Do not append a key to the address unless your encoder’s settings explicitly require a combined format; in OBS, the normal comparison is a server address and a separate key field.
After correcting the server field, save or apply the settings before testing. Keep the stream key unchanged for this comparison. If OBS still reports an error, you have learned that the address change alone did not resolve it, and can move on to the key and protocol without losing track of what you tested.
If you use another workflow as a reference, be clear about which software values are universal and which belong to a specific stream. A guide to inspecting an RTMP stream locally before sending it to YouTube may help you check a feed before it reaches YouTube, but it cannot supply the current YouTube URL or key for your broadcast. Those must come from the matching Live Control Room.
Verify the separate stream key
OBS normally holds the server address and stream key in distinct fields. Compare the key in OBS with the key shown in the Live Control Room settings for the same intended broadcast. Do not compare it with a key remembered from a previous session or copied from a different scheduled stream. If you are unsure whether the field contains the current value, copy the value again from YouTube rather than trying to reconstruct it.
A mismatch is worth correcting, but it would be wrong to say that a 404 proves the key is bad. YouTube’s troubleshooting guidance recommends getting a new key in Live Control Room for some encoder-start problems. That is a documented step to consider when appropriate, not a special diagnosis for this status code. See YouTube’s encoder troubleshooting guide for its current instructions.
If you reset or generate a new key, update OBS with that new key before starting the encoder again. A refreshed key will not help if OBS is still sending the old one. Store keys privately and avoid putting them in a public screenshot, chat, or support post; if one may have been exposed, use YouTube’s controls to replace it and update the encoder that should use it.
Make only one deliberate key change at a time. First establish that OBS points to the right broadcast; then verify or refresh the key if there is a reason to do so. This keeps the test interpretable and avoids turning a straightforward comparison into a cycle of copying unrelated settings.
Retrieve the RTMPS URL if using RTMPS
RTMPS uses an encrypted connection and YouTube provides a corresponding RTMPS URL. If you intend to send RTMPS, reveal and copy that URL using the lock control beside Stream URL in Live Control Room. Use the value YouTube displays for that stream. Do not assume that an ordinary RTMP address can simply be substituted for it, or that the two address types are interchangeable.
YouTube’s RTMPS instructions describe retrieving the RTMPS URL and say that both the protocol and server should be RTMPS for that configuration. This gives you a direct comparison: the selected protocol in OBS should agree with the address you copied. If you have selected RTMPS, an RTMP server value is not a substitute merely because its text looks similar.
If a correct RTMPS URL is in use but OBS reports an SSL error, consult YouTube’s current troubleshooting instructions; the help page suggests trying port 443 in that SSL-error context. Do not add or alter a port as a generic 404 fix. The suggestion is specific to the documented SSL troubleshooting case, not evidence that every 404 involves a port problem.
HLS is another protocol, not a variant of the RTMP address. YouTube’s HLS setup instructions use a separately generated HTTPS URL and require HLS as the stream protocol. Do not paste that URL into an RTMP or RTMPS configuration. Use HLS only when you intend to configure HLS and your encoder supports it; changing protocols is not a shortcut for diagnosing this error.
Check that OBS protocol settings agree
Once the server URL and key have been checked, verify the protocol selection in OBS. Use the protocol that corresponds to the URL you copied from Live Control Room: RTMP with the intended RTMP address, or RTMPS with the RTMPS address and matching configuration. Labels and available choices can differ with software versions, so read the setting rather than relying on where it appeared in an older screenshot or tutorial.
If your setup is meant to use HLS, select HLS only if it is supported by your encoder and use its separately generated HTTPS address. RTMP, RTMPS and HLS are distinct ingestion choices, so a URL from one does not become valid in OBS merely because the text can be placed in a server field. For ordinary OBS streaming, first confirm the workflow you intended to configure rather than switching protocols at random.
After changing a protocol setting, check the server URL again. A change in protocol may mean you need to retrieve a different URL from Live Control Room; retaining the previous address can leave OBS configured with a mismatched pair. Save the settings, then test the connection once before making another adjustment.
For a 24/7 channel, there may be a choice between keeping a local encoder running and using a workflow that sends a prepared file without leaving your everyday computer on. If you use OBS, its server, key and protocol still need to be correct for the current stream. If the specific pain is that the computer must remain on and you do not want to manage a long-running encoder, StreamNeo turns an uploaded video into a YouTube live stream without requiring OBS to stay open on your machine. It does not change which stream URL, key or protocol belongs in OBS when OBS is your chosen encoder.
Test the connection and inspect preview
With the matching URL, key and protocol in place, start streaming from OBS and watch both the encoder and Live Control Room. Look for an incoming preview and any health or error messages in YouTube’s dashboard. The preview is a useful sign that a feed is arriving, but continue to check the dashboard status and the exact message rather than treating a single visual cue as proof that every setting or broadcast requirement is satisfied.
If no preview appears, note what OBS reports and re-check the values against the same broadcast. Confirm that the server field is the current URL, the key is entered separately and belongs to that stream, and the protocol agrees with the address type. If you changed one value, record which one. Avoid cycling through random addresses or keys: that can obscure what the original failure was and may leave you with a second mismatch.
If YouTube displays a health message, use its wording to choose the next check. If OBS displays an SSL or timeout message while using RTMPS, follow the relevant RTMPS troubleshooting guidance rather than interpreting it as the same issue as a 404. If the dashboard reports a different stream error, use YouTube’s help for that message. The next action should follow the evidence visible in the encoder or Live Control Room, not an assumed meaning attached to “404”.
Once a feed reaches YouTube, distinguish connection verification from the rest of the stream setup. A preview does not establish that your content, event settings or ongoing broadcast are all as intended. For a radio-style channel, the broader encoder setup is separate from endpoint checking; running OBS for a 24/7 YouTube radio station on Linux covers a longer-running workflow. Keep the current connection test focused on whether OBS is sending to the right stream with the intended protocol.
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FAQ
Does an RTMP 404 prove that my stream key is wrong?
No. YouTube’s published help does not define this OBS status as a unique diagnosis. Compare the key with the one for the intended stream, but also verify the server URL and protocol and inspect the Live Control Room status.
Can I use the regular RTMP address when OBS is set to RTMPS?
Do not assume that you can substitute one for the other. For an RTMPS setup, retrieve the RTMPS URL using the lock control beside Stream URL and make sure OBS’s protocol and server settings agree with that choice.
Should I reset the stream key to fix a 404?
A new key is one troubleshooting step YouTube recommends for some encoder-start problems, but the 404 alone does not establish that a reset is needed. First compare the current key and address with the matching stream; if you do reset it, update OBS with the new key before testing again.
Where should I look after changing the settings?
Start OBS and check whether the matching broadcast shows an incoming preview in Live Control Room. Read any dashboard health or error message and the exact OBS message; use those details to choose the next step instead of treating the status code as a complete diagnosis.