Media diagnostics · Primary-source explanation; no UK IPTV implementation or account test. Instructions are based on publisher guidance; a UK IPTV account was not tested on this platform.
Work out the scale before recording
Consider uncompressed audio with eight channels, 48,000 samples per second and 24 bits per sample. Its sample payload rate is 1,152,000 bytes per second before container overhead. One hour needs 4,147,200,000 payload bytes; ninety minutes needs 6,220,800,000. These are original calculations with decimal byte counts. A long multichannel session can therefore approach or pass the traditional RIFF size range much sooner than a casual comparison with a short stereo file suggests.
Do not confuse two different barriers
EBU Tech 3306 defines RF64 as an extension to RIFF/WAVE and Broadcast WAVE that supports sizes beyond four gigabytes. This is a container-format solution. A filesystem may impose its own per-file limit, and changing the container does not remove that separate limit. Likewise, moving a traditional RIFF export onto a filesystem that accepts larger files does not rewrite the format into RF64. Check both the recorder or editor output variant and the destination filesystem before a consequential personal recording.
Confirm the complete workflow
An application must support writing the selected variant, and the next player or editor must support reading it. A wav extension alone does not tell you which structure was produced. Keep a short compatibility test and a separate duration or size test with the actual equipment, while preserving any original recordings. Do not infer that a larger disk guarantees an uninterrupted session or that RF64 repairs an already incomplete file. No recording device or UK IPTV export route was tested for this arithmetic example.