Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors“Invalid data found when processing input” is a generic FFmpeg error, not a diagnosis. It does not tell you whether the problem is an unavailable source, a transport or playlist issue, unexpected input bytes, an incorrect format assumption, stream selection, or decoding. Preserve the complete command and log, identify where processing fails, probe the source with ffprobe, and change only what the evidence points to. Without the stream URL or protocol, FFmpeg version, command, and surrounding log, there is no reliable Gurbani-specific fix to give.
Start by locating where FFmpeg fails
FFmpeg processes input through distinct stages: it opens and probes the input, demuxes it into streams, selects streams for output, and may then decode or encode media. An error while opening an input points to a different investigation than an error reported after a numbered stream begins decoding.
Invalid data found when processing inputon its own does not identify the failing stage or cause.Error while decoding stream #0:Nindicates that this invocation reached a stream and encountered a decoding error. The stream index is specific to that input; use probe output to determine whether it is audio or video and what codec FFmpeg reports.
FFmpeg-user discussions have reported similar wording in different circumstances, including an HLS input, a decoding error, and a receiver-start timing question for UDP. Those examples are not Gurbani-specific and do not establish a universal fix.
Capture the complete command and log
Before changing flags, preserve the exact FFmpeg version and build, full command, input protocol, and all output around the failure. Keep the FFmpeg banner and lines before the error: they can show whether input opening succeeded and which streams were detected.
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- Run the same command with FFmpeg’s
-reportoption. It writes the command line and log output to a timestamped report file in the current directory and enables debug-level logging. - Save the full output, including the lines immediately before and after the error. Avoid sharing only the final error line.
- Before sharing a report or URL, remove stream keys, passwords, and private tokens. Keep the protocol and non-sensitive endpoint details, since these can matter to diagnosis.
For example, add -report to the invocation you already use:
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ffmpeg -report -i "INPUT" -f null -This is a diagnostic starting point, not a command tested against a Gurbani stream. Replace INPUT with the actual source, and do not publish credentials embedded in it.
Probe what the source actually provides
Use ffprobe to check whether FFmpeg recognizes the input format and which streams it can see:
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ffprobe -hide_banner -v warning -show_error -show_format -show_streams "INPUT"Read the output for the reported format and each audio or video stream, including its codec. Compare it with what your command assumes. If the source is live, record when you ran the probe and whether another client could play the same source at that time: a live endpoint can behave differently over time.
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- Confirm the source: Make sure the URL or capture device is the intended one and is available to the machine running FFmpeg.
- If the input is HLS: Check that the endpoint returns the expected playlist and that the host can access its referenced media segments. An error on an HLS URL alone does not prove the local command is wrong.
- If the input is HTTP: Consult the protocol documentation for your installed FFmpeg build before using options such as
reconnect,reconnect_at_eof,reconnect_on_network_error, orreconnect_on_http_error. These address specified connection or live-EOF conditions; they cannot fix invalid media bytes, an incorrect URL, an unsupported format, or a server response that is not media. - If the input is UDP or another protocol: Establish that from the actual endpoint and command before applying protocol-specific advice. The error text alone does not identify the transport.
Check the format and stream mapping from probe results
Use the detected format and stream list to check whether your command assumes the right input format and available tracks. FFmpeg’s -map option controls which streams are sent to an output. A mapping correction can help when the wrong stream is selected, but it is not a general fix for invalid input data. Do not assume every source has both audio and video or reuse stream indices without checking the current probe results.
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The -f option may be needed for raw input, but force a demuxer only when you know the input is raw and know its format. Forcing a format based only on this error can make the diagnosis less clear.
Make one change, then compare a new report
- Choose a change supported by the evidence: correct a confirmed wrong endpoint, wait for a sender that has not begun, correct a verified format or mapping assumption, or use a reconnect option only when logs show the corresponding connection condition.
- Change one thing at a time and run the diagnostic again.
- Save the new full report and compare it with the original. Check whether FFmpeg now opens the input, detects the expected streams, and gets past the stage that previously failed.
A broad error-ignoring flag is not a substitute for finding the cause. Suppressing errors can hide useful evidence and make an ongoing broadcast harder to diagnose.
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What details are needed for a stream-specific fix?
The corrected command depends on information not contained in the error phrase. To get a meaningful diagnosis, collect:
- the complete command, with secrets removed;
- the exact FFmpeg version and build;
- the source protocol and a sanitized URL or endpoint description;
- the complete log, including the FFmpeg banner and surrounding lines; and
- the matching
ffprobeoutput, plus when it was collected for a live source.
Without these details, prescribing a format override, reconnect flag, stream map, or re-encode would be guesswork.
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