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General Discussion: how to check if a video was modified

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mcy111 wrote: yes I understand that is far fetched, however I do believe the audio has been faked somehow. Do you know if that could be plausible?Somehow "how"? I mean, we miss a lot of details on your setup, "normal" security video have no audio and usually there must be a reason to set up a device recording audio too, presuming that the footage is happening overnight, there should be no audio anyway (since there is normally no noises in a closed *whatever*). If you prefer, what did you expect the audio recording to sound like? What does it actually sound like? Which differences are there between you expectations and the actual result? What makes you think that the audio was faked/changed/manipulated? Example (hypothesis that the thingy is used to record who passes through an access in a warehouse during closing hours): Instead of complete silence or maybe the noise of cars, trucks or trains passing by you hear a few known rap songs <img src="images/smiles/icon_eek.gif" alt="Shocked" title="Shocked" /> . Possible explanation #1: A group of kids with a boom box has stayed sometime outside the building in the vicinity of the security microphone <img src="images/smiles/icon_neutral.gif" alt="Neutral" title="Neutral" /> . Possible explanation #2: For *whatever* technical reason the audio recording cabling/hardware got tuned on a local FM station <img src="images/smiles/icon_confused.gif" alt="Confused" title="Confused" /> . Possible explanation #3: A villain from SPECTRE, as a preliminary step towards world domination and stuff is testing a new death ray that wirelessly injects rap music into any electrical appliance <img src="images/smiles/icon_exclaim.gif" alt="Exclamation" title="Exclamation" /> . jaclaz

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