CRC Error when copying a .AVI file how to correct?

[faramith]

Hi i have a .DIVX movie it gives me a CRC error when im trying to copy it, but it plays fine on windows media player. Anyone knows what causes this and how to fix it?

thanks!

PD i dunno if I run a Checkdisk and it fixes that it might corrupt the file

[Krispy Kritter]

What software is telling you there is a crc error?

[edsmith77]

faramith,
The fact that your avi plays fine is not an indicator that there are no CRC errors. Typcially, all it takes is one bit in one byte to create a crc error. However, one bit within one byte will not be seen in a video.
In normal computer usage CRCs are most generally generated when you "transfer" data from one place to another (i.e, disk to memory, memory to disk, memory to application, or disk, etc). When the receiver does a crc check on the received data stream and it is not the same as what the sender sent you, then normally a CRC error is raised and depending upon the level of sophistication built in either a retransfer happens or processing stops.
Some typical causes are noise on the line (sometimes called burst errors and most CRC algorithms will account for some classes of this type but not large amounts). The sender and reciever not using the same CRC algorithm (rare but it does happen).

So as the previous poster said, under what circumstances did this crc error happen?

[jagabo]

all it takes is one bit in one byte to create a crc error. However, one bit within one byte will not be seen in a video.

Might not be seen. On the other hand it could render the entire file useless. Or it may mess up an entire GOP -- and with Divx's typical 300 frame GOPs that could ruin 10 seconds of video.

[TBoneit]

You could try opening a DOS command Prompt and copy using Xcopy. Xcopy /? will give you all the commands. However /c is the switch to continue copying even if errors occur.