[Trisquel-users] Can't convert .ogv to .flv

[SpiroPoulos89]

I know if this problem is because of restricted codecs but when I try to  
convert a .ogv video to .flv with winff I get the following error.

"swScaler: Unknown format is not supported as input pixel format
Cannot get resampling context"
When I try to upload a .ogv video to youtube the video does not come out,  
only the sound does. Is there any format I can convert it to in trisquel to  
upload it to youtube??