Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problems“Invalid data found when processing input” is a generic FFmpeg error, not a diagnosis. It can point to an unavailable or incorrect source, a transport problem, unexpected media data, format detection, stream selection, or decoding. The right fix depends on where the failure occurs and what FFmpeg and ffprobe report; there is no evidence-based universal command for a Gurbani live stream without its protocol, command, version, and full log.
First, identify where FFmpeg fails
FFmpeg handles an input through distinct stages: it opens the source, detects and demuxes its format into streams, then decodes or maps streams for processing or output. An error while opening an input calls for different checks than an error decoding a numbered stream. The message alone does not tell you which stage or cause is responsible. See the FFmpeg documentation.
- Input-opening failure: Check whether the endpoint or device is correct and reachable, and whether FFmpeg receives the expected kind of response.
- Decoding failure: If the log says, for example,
Error while decoding stream #0:N, note the stream index. Use probe output to determine whether that stream is audio or video and which codec FFmpeg detected.
The error wording has appeared in FFmpeg-user discussions involving different situations, including HLS input and receiving UDP video when joining at different times. These examples illustrate why the wording is not a root-cause diagnosis; they do not establish what is wrong with a particular Gurbani source.
Preserve the command and complete log
Before changing flags, keep the exact command, FFmpeg version and build information, and the output around the failure—including the FFmpeg banner and lines before and after the error. FFmpeg’s -report option writes the command line and log output to a file and enables debug-level logging. The documentation describes a filename in the form program-YYYYMMDD-HHMMSS.log in the current directory.
ffmpeg -report -i "INPUT" -f null -Replace INPUT with the actual source. This is a diagnostic starting point, not a command tested against the Gurbani stream in question. Before sharing a command, URL, or report, remove stream keys, passwords, and private tokens. Keep the protocol visible where possible (for example, HTTP or UDP) without exposing credentials.
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Probe what the source actually contains
Use ffprobe to see whether FFmpeg recognizes a format and which streams it detects. Its documentation covers -show_error, -show_format, and -show_streams.
ffprobe -hide_banner -v warning -show_error -show_format -show_streams "INPUT"Record when you ran the probe: a live source can change or be temporarily unavailable. If possible, check whether another client can play the same source at that time. A probe that reports no expected format or streams is evidence to investigate the source response, endpoint, or protocol before trying to change stream mappings or decoding options.
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Check the source and transport before changing FFmpeg options
Verify the endpoint and response
- Confirm the URL or capture device is the intended source and is currently available to the machine running FFmpeg.
- For an HLS URL, check that the response is the expected playlist and that the playlist’s referenced media segments are accessible from the FFmpeg host. An error on an HLS input alone does not prove the local command is at fault.
- For a live sender that may not yet be transmitting, check timing: receiving before the sender is ready can matter. Do not assume this is the cause without matching log evidence.
Use reconnect options only for matching HTTP failures
For HTTP inputs, FFmpeg’s protocol documentation describes options including reconnect, reconnect_at_eof, reconnect_on_network_error, and reconnect_on_http_error. Consult the documentation for the installed FFmpeg version and the exact input protocol before using them. These options address specified reconnection conditions; they do not make invalid media bytes valid, fix an incorrect URL, or repair a playlist or segment that serves the wrong content. See the FFmpeg protocol documentation.
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Check format detection and stream mapping
Use the probe results to confirm the detected container or format and the audio or video tracks that actually exist. Do not assume every source contains both, or that a stream index from one invocation will apply to another.
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FFmpeg’s -map option controls which input streams go to an output. If the input opens and the detected streams are valid but the wrong stream is being selected, an explicit mapping may help. Data and attachment streams are not automatically selected. Mapping is not a general fix for invalid input bytes.
The -f option can specify a format, but force a demuxer only when you know the input is raw and know its format. FFmpeg’s documentation notes, “The format option may be needed for raw input files.” A format override chosen by guesswork can obscure the actual problem rather than fix it.
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Change one thing, then compare a new report
- Write down the evidence from the log and probe: failure stage, detected format, stream list, and any connection or HTTP condition.
- Choose one change that corresponds to that evidence: correct a confirmed endpoint problem, wait for a sender that is not yet available, correct a demonstrated format or mapping assumption, or use an applicable HTTP reconnect option for a logged reconnection condition.
- Run the diagnostic again, save a fresh full report, and compare the output. If the failure changes or persists, use the new evidence rather than adding several unrelated flags at once.
Avoid broad error-ignoring options as a supposed repair when the underlying issue is unknown: suppressing diagnostics can make a live broadcast harder to troubleshoot.
What information is needed for a stream-specific fix?
The title alone does not identify the Gurbani stream operator, source URL, protocol, encoder, FFmpeg build, command, or surrounding log. Without those details, prescribing a particular format override, map, reconnect flag, or re-encode would be guesswork. To diagnose a specific case, collect:
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- the complete FFmpeg command, with credentials and private tokens removed;
- the exact FFmpeg version and build information;
- the sanitized source URL or at least its protocol and whether it is a file, network stream, or capture device;
- the complete log around the failure and the output of the
ffprobecommand above; - when the probe was run and whether the source was playable then.
Historical FFmpeg-user messages from 2016, 2021, and 2023 show similar error wording in different contexts; they are not Gurbani-specific and do not establish a fix for this source.
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