19.03.2021, 02:38
That information from:
https://learn.akamai.com/en-us/webhelp/m...C6FAD.html
Consider a small time period T over that desired to restrict the data throughput. We recommend a VBV buffer size of 1-5x video bitrate, and all renditions use the same VBV buffer size multiplier:
Is quite confusing, misleading.
Looks like TMPGEnc is OK with Max rate below < buffer, when difference is small.
As per their online specs:
MPEG File for AVCHD Progressive Devices:
• Maximum Bitrate: 27150kbps (video+audio+overhead) (when the video is 1080 50/60p)
• VBV Buffer Size: Maximum 3500000 bytes (Depends on the source file Profile & Level)
From above: Max rate 27150 is below < Buffer 27343kbits (3500000 bytes).
My camcorder's 1080 60p file has VBV Buffer 3418KB (26.7Mbits), Max Bitrate 26Mbits.
It means Max rate is below < buffer (it is close but below), and it is perfectly compliant file.
All files encoded with Hybrid as Max rate is below < buffer are OK as well.
For example I encoded as Max rate 25000 is below < buffer 28000, it was all good.
I even authored BDAV structure and burnt on DVD-R disc. My BluRay players plays that disc as BDAV BluRay without issues.
Just to be on the safe side, would it be a good option to use all numbers the same: VBV Buffer = Max Fill rate = Encoder bitrate setting (General Settings>Bitrate)= 25000 ?
Also what is the correct/optimal:
x264>Frames>Weighted P-Frame Prediction>set to refs (--weightp 1) or disabled (--weightp 0) ?
https://learn.akamai.com/en-us/webhelp/m...C6FAD.html
Consider a small time period T over that desired to restrict the data throughput. We recommend a VBV buffer size of 1-5x video bitrate, and all renditions use the same VBV buffer size multiplier:
- VBV buffer duration = VBV buffer size / VBV maximum bitrate
- VBV data throughput = (T + VBV buffer duration) * VBV maximum bitrate
Is quite confusing, misleading.
Looks like TMPGEnc is OK with Max rate below < buffer, when difference is small.
As per their online specs:
MPEG File for AVCHD Progressive Devices:
• Maximum Bitrate: 27150kbps (video+audio+overhead) (when the video is 1080 50/60p)
• VBV Buffer Size: Maximum 3500000 bytes (Depends on the source file Profile & Level)
From above: Max rate 27150 is below < Buffer 27343kbits (3500000 bytes).
My camcorder's 1080 60p file has VBV Buffer 3418KB (26.7Mbits), Max Bitrate 26Mbits.
It means Max rate is below < buffer (it is close but below), and it is perfectly compliant file.
All files encoded with Hybrid as Max rate is below < buffer are OK as well.
For example I encoded as Max rate 25000 is below < buffer 28000, it was all good.
I even authored BDAV structure and burnt on DVD-R disc. My BluRay players plays that disc as BDAV BluRay without issues.
Just to be on the safe side, would it be a good option to use all numbers the same: VBV Buffer = Max Fill rate = Encoder bitrate setting (General Settings>Bitrate)= 25000 ?
Also what is the correct/optimal:
x264>Frames>Weighted P-Frame Prediction>set to refs (--weightp 1) or disabled (--weightp 0) ?