supressed incorrect pts init (when the pts is not set, ffmpeg.c presumes the nominal frame rate is used
supressed incorrect pts init (when the pts is not set, ffmpeg.c presumes the nominal frame rate is used


git-svn-id: a4d7c1866f8397a4106e0b57fc4fbf792bbdaaaf@1252 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg,prajnashi/ffmpeg