#485 VBI (vertical blanking interval) capture

[Anonymous]

Most capture cards provide a VBI capture pin. The resolution of the captured data differs between manufacturers. However, it is just plain binary data that can be dumped to a file.

Such a simple feature would be very useful in VirtualDub. Only one checkbox is needed and a few extra lines of code when creating the DirectShow graph (to connect the DirectShow Dump Filter to a graph and set file name - same as capture file but with .vbi extension).

No additional synchronization is needed here. The dumped data would then be analyzed according to the user's needs on his own.

Such a feature is needed because currently there is no easy way to capture VBI, video and audio simultaneously. There are several ways, none of them are good:

1. Build and run your own graph in GraphStudioNext. Cons: no A/V synchronization
2. Capture A/V in VirtualDub, then VBI in other way. Cons: double capture time, double tape and player wear
3. Use DScaler. Cons: better not to say it, it's just terrible
4. Use VBIUtils from github. Cons: this is mod of the old version of VirtualDub and you have to compile it yourself