Adobe Premier CS3 doesn't support flv and dat (as input). This is due to a few reasons:
- Dat is ambiguous data format, it can be video or just anything. It is matter of extension.
- Flv maybe is a compressed video.
To convert dat file into MPEG, you can use VCD Gear.
It is a freeware and it works damn fast.
Using Adobe Premier CS3 is really no-frills. There are just a few things to master.
- Assets manager (managing objects)
- Source manager
- Output manager (sequence)
- Timeline manager (for cutting)
Since YouTube only allow videos of the following attributes:
- Not more than 10 minutes
- Not more than 1 GB in size.
In Adobe Premier CS3, each clip is known as sequence.
So, to add sequence, use the Asset manager.
Drag the video from 'Source' into the 'Timeline'.
Scale the 'Output'.
Use 'razor' to cut then 'clear' away unwanted portions.
Move wanted portion back to the starting point. This will ensure that your sequence (clip) start on at time 00:00:00
Export each 'sequence' using Adobe Media Encoder.
Select desirable output format.
Done. The output can then be uploaded to YouTube.