Most of the files that you see of the form .001, .002 are split using hjsplit.
To join them you just need to use hjsplit.
Download it by clicking-here.
You do not have to install HJSplit. Just extract ‘hjsplit.zip’ which you downloaded and double click on HJSplit.exe to start HJSplit. After that, the main window of HJSplit will appear.
1)To join the files, click on ‘Join’:
2)In the new window that appears, click on input file:
3)In the new window, select only the first file of the files that we would like to join (it automatically shows only .001 file), so fired.avi.001 in this case, and click on ‘Open’ after that.
4)Click on ‘Start’:
5)Now HJSplit will join the file, in few seconds. When it is finished you will see this message:
The files have been successfully joined! The joined output file is stored in the location specified in the output file column, which would be same as the location of your input .001 file. Enjoy :D
Check whether ur movie plays completely till the end before deleting the .001 file parts..
If Movie doesn't Play Completely then try following:
Just Rename All(select all files to be renamed, then press F2 and type the name then press Enter)the Parts Without Joining,To A Same Name.. Then It Would Be Solved But Not To Change The Extension Like This One. (harrypotter.001.avi)