BD Rebuilder Bitrate

[whaqatac]

I apologise if this question has been asked before elsewhere but when I tried a search on bitrate the list seemed to go on forever.

Been backing up my DVD's for many years now using CCE and scenarist to start with before moving onto DVD Rebuilder of which I've used the PRO version for the last few years, so a quick thanks JDobbs after all this time for a great tool.

Recently started to use BD Rebuilder to encode and rebuild my BluRays and I have a question regarding the bitrates (Yes there was going to be a question in here eventually!)

Whenever I backed up my DVD's I always ensured that the bitrate for all areas was never below 3000 and any extra was left in the main movie. After running BD Rebuilder last night (and all day!) it gave the following report:

[00000]
AUDIO=11000000000000
PGS=110000000000000000000000000
M2TS_TARGET=18248614029
RATE=8836
NSIZE=17360037888
FLINK=0
MLINK=0
[00018]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=243350664
RATE=1936
NSIZE=253642752
FLINK=0
MLINK=0
[00019]
AUDIO=11111111111111
PGS=100000000000000000000000001
M2TS_TARGET=390127556
RATE=1955
NSIZE=406523904
FLINK=0
MLINK=0

I understand that the rate of 8836 is for the movie but the rate of 1936 and 1955, are these the equivalent rates similar to a DVD backup or is a bitrate of 1936/1955 acceptable on Blu Ray?

1900 in a DVD used to be very blocky in my experience which is why I always aimed for above 3000. Sorry again if the question has already been asked and answered elsewhere.

And thanks again for all the work you've done in DVD Rebuilder and BD Rebuilder over the years, JDobbs.

[Dark Shikari]

I would guess those sections are extras in SD resolution.

2000kbps is plenty--if anything, twice as much as is necessary--for good SD quality. Remember, DVD Rebuilder was MPEG-2.

[jdobbs]

The selected output rates are all calculated to be proportional to the space they occupied on the original disc. The exception would be if you selected "quick encoding for extras", in which a fixed CRF value would be used for the output.

When you see low bitrates like that, it's often associated low demand sources like still screens or blank sections used for seeking. I can't tell from listing if this represents everything encoded or if this was a movie-only or full backup... but since it only adds up to about 18GB in total target size I'd guess there is more.

Remember (as Dark Shikari mentioned) that H264 (AVC) can do a lot more with a specific bitrate than MPEG-2 could.

[whaqatac]

Thanks for the quick replies.

Sorry, it is a full Blu Ray backup with movie and extras and all English streams.

I've attached the full list.

LABEL=*************
VERSION=v0.31.02 (beta)
SOURCE_SIZE=40620966180
SOURCE_VIDEO_SIZE=40305819648
TARGET_SIZE=25060966400
REDUCTION=.61395153563706
RESIZE_1080=0
AUDIO_TO_KEEP=eng;
SUBS_TO_KEEP=eng;enm;
BACKUP_MODE=0
QUICK=0
ENCODE_STEP=0
COMPLETED=11
REBUILD_COMPLETE=1
[00000]
AUDIO=11000000000000
PGS=110000000000000000000000000
M2TS_TARGET=18248614029
RATE=8836
NSIZE=17360037888
FLINK=0
MLINK=0
[00018]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=243350664
RATE=1936
NSIZE=253642752
FLINK=0
MLINK=0
[00019]
AUDIO=11111111111111
PGS=100000000000000000000000001
M2TS_TARGET=390127556
RATE=1955
NSIZE=406523904
FLINK=0
MLINK=0
[00020]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=269378280
RATE=1937
NSIZE=280793088
FLINK=0
MLINK=0
[00021]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=515158187
RATE=1922
NSIZE=537212928
FLINK=0
MLINK=0
[00034]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=441756539
RATE=1938
NSIZE=460517376
FLINK=0
MLINK=0
[00035]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=359267857
RATE=1944
NSIZE=374452224
FLINK=0
MLINK=0
[00036]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=3178952643
RATE=9792
NSIZE=3168344064
FLINK=0
MLINK=0
[00037]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=563844917
RATE=1938
NSIZE=587710464
FLINK=0
MLINK=0
[00038]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=391432709
RATE=1835
NSIZE=408717312
FLINK=0
MLINK=0
[00046]
AUDIO=11111111111111
PGS=110000000000000000000000000
M2TS_TARGET=143936488
RATE=2265
NSIZE=155836416
FLINK=0
MLINK=0

When I look at the stream tab in BD Rebuilder all the ones that attract the low bitrates say VID_000** MPEG-2, 480i, 29.97fps, *** MB. Looks like about 4.5GB of the original disk.

[jdobbs]

Thanks for the quick replies.

Sorry, it is a full Blu Ray backup with movie and extras and all English streams.

I've attached the full list.

...

When I look at the stream tab in BD Rebuilder all the ones that attract the low bitrates say VID_000** MPEG-2, 480i, 29.97fps, *** MB. Looks like about 4.5GB of the original disk.Then it fits perfectly into Dark Shikari's note. That is more than enough bitrate to give high quality from the SD sources.