feature bitrate in preview/edit

[pbr]

another newbie question...
when i use steal space from extras
in the preview/edit section the value show as "feature bitrate" is the final movie bitrate with the improvement of the extras blanked and extras reduction??

[jdobbs]

Yes. The effect of "Steal Space" has already happened when you open with the segment editor.

[eDroj]

I have a question about bitrates aswell, how do I interpet these figures?

- Reduction Level for DVD-5: 46,8%
- Overall Bitrate : 3038/2430Kbs
- Space for Video : 3285916KB
- Movie improvement from extra reduction = 19,9%
- HIGH/LOW/TYPICAL Bitrates: 3710/545/2430 Kbs

[jdobbs]

- Reduction Level for DVD-5: 46,8%
This means the original disc will need to be reduced to 46.8% of its original size in order to fit on a DVD-5.

- Overall Bitrate : 3038/2430Kbs
The average bitrate across the entire reencoded disc will be 3039Kbs on NTSC interlaced sections, otherwise it is 2430Kbs. Note that less bitrate is needed to get the same quality in a source that uses pulldown -- because fewer pictures are encoded.

- Space for Video : 3285916KB
The output disc will use this amount to store the video (only) portion of the output. This does not include the menus, IFO, BUP, audio, or subpicture portions of the output.

- Movie improvement from extra reduction = 19,9%
When using mechanisms to reduce the amount of space applied to extras (like "Half/Half" or "Steal Space") -- this is the level of improvement applied to the main feature as a result. Note that this can also be a flag if you are doing series discs... since the "Feature" is always considered to be the largest VTS -- trying to reduce "Extras" can actually hurt any of the episodes that aren't in the biggest VTS...

- HIGH/LOW/TYPICAL Bitrates: 3710/545/2430 Kbs
Each segment has an average bitrate assigned that is based upon its individual demand. These show the highest, lowest, and typical bitrates that are applied as the average to the segments.

[jptheripper]

jdobbs, i have asked before but not sure if you ever answered

any way to get high/low/typical in the log on a per vts level?
ie
vts_01 high/low/typical:
vts_02 high/low/typical:

would be extremely helpful in determining if half/half was too aggressive and rb-opt might be needed to tweak.

[maxse]

- Reduction Level for DVD-5: 46,8%
This means the original disc will need to be reduced to 46.8% of its original size in order to fit on a DVD-5.

- Overall Bitrate : 3038/2430Kbs
The average bitrate across the entire reencoded disc will be 3039Kbs on NTSC interlaced sections, otherwise it is 2430Kbs. Note that less bitrate is needed to get the same quality in a source that uses pulldown -- because fewer pictures are encoded.

- Space for Video : 3285916KB
The output disc will use this amount to store the video (only) portion of the output. This does not include the menus, IFO, BUP, audio, or subpicture portions of the output.

- Movie improvement from extra reduction = 19,9%
When using mechanisms to reduce the amount of space applied to extras (like "Half/Half" or "Steal Space") -- this is the level of improvement applied to the main feature as a result. Note that this can also be a flag if you are doing series discs... since the "Feature" is always considered to be the largest VTS -- trying to reduce "Extras" can actually hurt any of the episodes that aren't in the biggest VTS...

- HIGH/LOW/TYPICAL Bitrates: 3710/545/2430 Kbs
Each segment has an average bitrate assigned that is based upon its individual demand. These show the highest, lowest, and typical bitrates that are applied as the average to the segments.

So the actual average bitrate is 3038? So what is the above 2430 that is the avergae bitrate applied to segments?

Basically my question is this. When groups in "The Scene" release something on vcdquality and state the average bitrate. Is that the bitrate of 3038 on this DVD or would it be the 2430 bitrate in this case?

[SpazzHH]

So the actual average bitrate is 3038? So what is the above 2430 that is the avergae bitrate applied to segments?
2430 is the bitrate applied to the encode, which for NTSC sources, is
done at 23.976 frames per second. During Rebuild phase, Pulldown is applied to encode to put it at 29.97 frames per second. When this is done it puts the bitrate of the finished output up to 3038.

Basically my question is this. When groups in "The Scene" release something on vcdquality and state the average bitrate. Is that the bitrate of 3038 on this DVD or would it be the 2430 bitrate in this case?
It would be the 2430 bitrate because most releases are in avi format at 23.976 frames per second.
All this info is in other threads in this forum, many times. :search:

[jdobbs]

Where that actually applies is for sources that are 29.97 without pulldown. All NTSC encodes are done at a common denominator of 23.976. But during rebuild the frame rate is readjusted to 29.97. This is the method used by DVD Rebuilder to ensure encodes work for hybrid sources. If you have the same size data being transferred at the higher (29.97fps) framerate the true playback bitrate is increased by 125%.