[MEncoder-users] x264 encoding related - artifacts after broken encoding

[Thilanka Niroshana]

On 8/21/07, Loren Merritt <lorenm at u.washington.edu> wrote:
>
> On Mon, 20 Aug 2007, Thilanka Niroshana wrote:
>
> > This is regarding a broken x264 encoding.
> > I encoded a movie using the x264 codec and suddenly the machine went
> down (
> > elctricity).
> > Then after rebooting the file was there but when sought ( seeking)
> artifacts
> > appear and and encoded the second part of the movie and merged them
> together
> > but the first part still has artifacts or i mean little squares and the
> > colors are different. But it becomes okay when a different scene
> appears.
> > Is there a solution to this rather than doing the encoding again.
> > I hope you guys understand what i'm saying.
>
> Since mencoder didn't get to finalize the first file, it didn't write the
> avi index (specifying which frames are keyframes). And mplayer's
> indexless avi parser doesn't know how to derive keyframe flags for h264.
>
> Solution: demux the video stream to raw .264, then mux it again with some
> h264-aware muxer, like mkvmerge, mp4box, or avc2avi.
>
> --Loren Merritt
> _______________________________________________
> MEncoder-users mailing list
> MEncoder-users at mplayerhq.hu
> http://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>

Thanks. :-) I hope this works. You know this thing happened to me like 5
times.
And I was compelled to reencode those. Which was a painstaking  process.
Because I'm doing 2 pass, it takes me 12 hours to encode a movie on my
machine with the maximum quality.
Thanks again.