Bad Compression

[type1encryption]

My DVD "Planet Terror" - if you have seen the film you know why - doesn't compress very well. With my crf18-commandline (tuned hq-fast settings) I get about 80 % of the originals size.

The artificial scratches (which often last for a single frame) seem to have a negative effect on compression ratio.

Do you have any idea to improve the situation?

[Dark Shikari]

You can try to clean it up with a filter like DeSpot, DeScratch, or a denoiser--or you can raise the CRF value.

[type1encryption]

Thanks, i thought about that too,

Descratch is not an option as the scratches were an artistic decision in postproduction of the film. I'll try the denoisers.

If someone has an idea for this film, feel free to comment.

[Ranguvar]

Hm. Raise inloop deblocker? Although that should be a last resort.

[Sharktooth]

planet terror and death proof are both hard to compress.
the post-production dust, scratches, etc is something you dont want to get rid of. they're part of the movie. denoisers will also negatively affect the "look and feel" of the backup.
those movies are just the worst case scenario for x264...
use something like HQ Insane but with 1pass CRF mode instead of 2pass bitrate mode.
AQ may also play a role...

[ToS_Maverick]

a good way for raising the compression without destroying the look is simply resizing to a lower resolution.

half the pixels is half the size ;)

[Sharktooth]

not properly, but... it will destroy grain, noise, part of the dust and scratches... and the "look and feel" of the movie.

[*.mp4 guy]

not properly, but... it will destroy grain, noise, part of the dust and scratches... and the "look and feel" of the movie.

Well, it depends upon how good the movie looks to begin with. Generally for most dvd's, and hd sources there is a significant amount of wasted resolution, and beyond that there is usually a bit of "not very important" resolution, which can be cut for minimal quality losses. I wouldn't cut the horizontal and vertical resolution by half or anything like that, but If your careful you can get a bit of extra compression by lowering the resolution a bit, without significantly effecting video quality. On the other hand, if your video is perfectly sharp, and has lots of complex detail, you would have to be a fool to resample it.