}
void
-J2KStillEncoder::process_video (shared_ptr<Image> yuv, int frame, shared_ptr<Subtitle> sub)
+J2KStillEncoder::process_video (shared_ptr<const Image> yuv, int frame, shared_ptr<Subtitle> sub)
{
pair<string, string> const s = Filter::ffmpeg_strings (_film->filters());
DCPVideoFrame* f = new DCPVideoFrame (