The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →The error Invalid data found when processing input does not identify one specific fault. When relaying radio to YouTube, first find out whether FFmpeg is rejecting the radio station’s input, failing to decode it, or encountering a problem at YouTube’s output. Probe the station’s direct audio URL with ffprobe and inspect the surrounding log before changing codecs or bitrate.
What the FFmpeg invalid-data error means
FFmpeg documents AVERROR_INVALIDDATA with the message “Invalid data found when processing input.” The message identifies an error code, not its root cause. It does not tell you whether a station URL returned a web page instead of audio, the stream format was not recognized, a connection or access requirement failed, or another input-processing step rejected the data. The [FFmpeg error-code documentation](https://ffmpeg.org/doxygen/8.0/group__lavu__error.html) defines the error but cannot diagnose a particular station or command.
Keep the two ends of the relay separate while troubleshooting: the radio station is FFmpeg’s input; YouTube is its output. A bad YouTube server URL or stream key is an output-side problem, not proof that the radio input is invalid.
Find which stage is failing
Read the complete FFmpeg command and the log lines immediately before the error. Identify which URL FFmpeg was opening or writing when the failure occurred, and note the first preceding warning. The generic error by itself is not enough to pinpoint a cause.
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- If FFmpeg fails while opening the radio URL, investigate that endpoint, its response, access requirements, redirects, and protocol support.
- If it opens the endpoint but fails while reading or decoding, use the log and a probe to identify what format and streams FFmpeg detected.
- If the input works but writing to YouTube fails, check the destination URL, stream key, selected protocol, and output configuration separately.
Probe the radio stream URL by itself
Use the station’s actual listening-stream address—not automatically the station’s homepage or a directory page. Replace the placeholder below with the direct URL:
ffprobe -hide_banner -loglevel debug "RADIO_STREAM_URL"This is an inspection step, not a guaranteed repair. If ffprobe recognizes the input, record the detected format and audio stream details before changing your FFmpeg command. If it fails before identifying a format or stream, investigate what the endpoint is returning and whether FFmpeg can reach and interpret it.
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Do not share logs containing credentials, private tokens, or signed query strings. Redact those values before asking for help.
Check the response, not just the address
A URL can be syntactically valid but return something other than audio: for example, a station webpage, login page, error document, or playlist. A playlist may need to be parsed to find the actual stream endpoint. If the response is HTML or text, changing an audio codec will not make it an audio stream. Confirm the response and log rather than assuming this is the cause in every case.
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Check protocol and format support
Inspect the URL scheme and the format reported by the probe, then confirm that your installed FFmpeg build supports the relevant protocol and format. FFmpeg’s [protocol documentation](https://ffmpeg.org/ffmpeg-protocols.html) covers network protocols and options. Its Icecast options describe publishing; they do not mean a station’s listening URL should be treated as an Icecast publishing destination. Do not force an input format such as MP3 unless the response or station documentation establishes that format.
Check YouTube only after the input works
Once the radio URL can be probed or played, check the YouTube destination as a separate stage. YouTube’s encoder workflow says: “To start streaming, enter your YouTube Live server URL and stream key into your encoder.” Create or open the stream in YouTube Studio’s Live Control Room, then use the current server URL and key shown there. Keep the key private.
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YouTube’s current [encoder settings](https://support.google.com/youtube/answer/2853702) list RTMP/RTMPS, recommend RTMPS for encrypted transport to Google’s servers, and list AAC or MP3 audio. For stereo audio, the page specifies 44.1 kHz and 128 Kbps. These are YouTube’s published encoder settings; they do not establish the source radio station’s bitrate or prove that it must match those output values. FFmpeg’s [protocol documentation](https://ffmpeg.org/ffmpeg-protocols.html) describes RTMP, and its [formats documentation](https://ffmpeg.org/ffmpeg-formats.html) covers FLV and RTMP-related handling.
Audio-only presentation
Radio supplies audio. A conventional YouTube live encoder setup may also call for a video component: YouTube’s settings page lists video codecs and parameters for live output. Those published settings do not establish that every audio-only FFmpeg command will be accepted or rejected. If your intended presentation needs video, add a legitimate still image or visual loop as a video input. That may address the presentation format; it will not repair a malformed radio URL or a response that contains no audio.
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Retest one change at a time
- Confirm the input: probe the direct radio endpoint and establish that FFmpeg detects the expected audio stream.
- Confirm the destination: copy the current YouTube server URL and stream key from YouTube Studio, and select the matching RTMP or RTMPS option.
- Run a short test: use a private or unlisted test stream, if appropriate for your channel, before relying on the relay.
- Change one setting per attempt: keep a copy of the last working command so you can distinguish an input fix from an output change.
The right diagnosis depends on the station endpoint, its availability and access behavior, your operating system and FFmpeg build, the full command, and the surrounding log. No single command or setting can be guaranteed to fix every station’s error.
Common causes and what to check
| What you observe | What to investigate | Next step |
|---|---|---|
| Probe fails before reporting a format or audio stream | Wrong or unavailable endpoint, redirect or authentication behavior, unexpected response, or unsupported protocol | Check the direct listening URL, response, access requirements, and FFmpeg protocol support. |
| The URL returns a station page or other text | The address may be a webpage or playlist rather than the audio endpoint | Find the direct stream URL or resolve the playlist, then probe that endpoint. |
| Probe identifies audio, but the YouTube output fails | Destination URL, stream key, selected protocol, or output settings | Verify the current values in YouTube Studio and troubleshoot output independently. |
| Audio input works, but the intended live presentation is incomplete | The encoder output may need a video component for the presentation you want | Check YouTube’s current video settings and add an appropriate visual input if needed. |
Keep a continuous radio relay running
For a do-it-yourself relay, FFmpeg must keep running somewhere with access to both the station input and YouTube output. A local computer depends on that computer and its network staying available; a VPS is an optional place to run the process continuously, not a fix for an invalid URL or bad response. Whichever you use, protect both the YouTube stream key and any private radio URL. YouTube’s encoder setup and settings are documented in its [encoder guide](https://support.google.com/youtube/answer/2474026) and [live encoder settings](https://support.google.com/youtube/answer/2853702).
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