Need help to convert Blu-ray MKV 1080 x264 Video files

[AndreL]

I have 7 video file, 4 about 12Gb, one 16.6, and 8.5, the last 10.9 I don't want the video quality to go down to much so I'd like for each file to fit on one DVD. My question is what should I convert it to, to archive that file size (4.37) and possibly keep the video ratio the same.

Also is there software online where it will give me a file estimate of file size after converting to that encoding type.

[jagabo]

Generally, you can't further compress Blu-ray video by 3:1 or 4:1 without losing some quality. x264 will probably give the best quality (use a GUI front end like xvid4psp) but you'll end up with an MP4 or MKV file that won't play on a standard DVD player. I don't know what you mean by "keep the video ratio the same".

file size = bitrate * recording time

Use a bitrate calculator to determine what audio and video bitrates to use to get the file size you want.

[AndreL]

But its already done with x264 but the files are huge too big for a dvd or a dual layer. Oh yea when I said video ratio I mean aspect ratio.
Also these files are x264 but with a mkv ext. and I thought that x264 was for mpg 3 or 4

My VLC player gives me these codec details
Type: Video
Codec H264 Mpeg-4 AVC (part10) (avc1)
Language: English
Resolution 1920x800
Frame rate: 23.976215

Strean 1
Type Audio
Codec DTS Audio dts
Language English
Channels 3F2/LFE
Sample 4500Hz
Bitrate 1536kb/s

Which one can I slak off on and try and keep a High video quality

and I think its such a large file is because of the resolution and the DTS audio
am I right when I say that.

[AaronDude]

Someone might know more but it seems as though the mkv container can contain just about anything, it seems to be very versatile.

[jagabo]

But its already done with x264 but the files are huge too big for a dvd or a dual layer.

That's why the quality is only going to get worse. The video is already compressed with (arguably) the best compression codec.

Oh yea when I said video ratio I mean aspect ratio.

That's just a matter of setting the AR flag when you encode.

Also these files are x264 but with a mkv ext. and I thought that x264 was for mpg 3 or 4

x264 is an implementation of the MPEG 4 part 10 compression specification, also known as h.264 or AVC. MKV is a container (a way of organizing data within a file) that can contain audio and video compressed with any of a number of different codecs. The x264 encoder can output to MKV, MP4, FLV containers, or as a raw h.264 stream.