With Converter App, you can convert WMV files into many other formats:
WMV to MP4 | WMV to MP3 | WMV to MOV | WMV to WEBM | WMV to JPG | WMV to AVI | WMV to MKV | WMV to SRT
→ All WMV Converters
If you want to keep working with your final SWF, try:
SWF to MP4 | SWF to GIF | SWF to WEBM | SWF to MOV | SWF to MKV | SWF to AVI | SWF to WMV | SWF to MPG