**System Information**
W 8.1, i7 3rd gen, 6gb, GeForce GT 650M
**Blender Version**
Broken: 2.75 RC2, c85a58a
**Short description of error**
Exporting screencast to H.264/MPEG-4 crashes Blender
**Exact steps for others to reproduce the error**
- Open Blender
- Change file format to H.264 in the Output panel
- Change the format to MPEG-4 in the Encoding panel
- Start screencast (Alt+F3)
- Exit screencast
- Blender crashes