MuxMan : Buffer Underflow

[Bonie81]

Any idea bout following MuxMan log, authored DVD plays choppy.
while other muxers rather than MuxMan muxes pretty smooth...DVD plays flawless / smooth.

MuxMan version 0.16.8
Accepted audio H:\Media Composer Output\Merissa_B'day_Party_Clip.ac3

03:13:30 Begin multiplex VTS01.
Title Segment List
Merissa_B'day_Party_Clip
Maximum audio duration 19478 fields.
Starting scene Segment_1_scn1 at 00:00:00:00
P-STD buffer underflow by 2211 bytes at 10664921, sector 57846.
P-STD buffer underflow by 5468 bytes at 10673930, sector 57907.
P-STD buffer underflow by 6043 bytes at 10676933, sector 57928.
P-STD buffer underflow by 1163 bytes at 10694951, sector 58051.
P-STD buffer underflow by 201 bytes at 10709966, sector 58153.
P-STD buffer underflow by 11066 bytes at 10736993, sector 58338.
P-STD buffer underflow by 11878 bytes at 10739996, sector 58359.
P-STD buffer underflow by 639 bytes at 10746002, sector 58400.
P-STD buffer underflow by 9939 bytes at 10755011, sector 58461.
P-STD buffer underflow by 1034 bytes at 10812068, sector 58866.
P-STD buffer underflow by 45630 bytes at 10815071, sector 58872.
SeqEnd at 13EC001A.
Bytes remaining in buffer = 95272.
Bitrate - avg: 8810039, min: 556499 (lba 0), max: 10442549 (lba 148380).
Shortest GOP has 2 fields, longest GOP has 30 fields.
Fields: 19516, VOBU: 629, Sectors: 175078.
Video decoder buffer underflowed 11 times.
Check h:\muxman.log for details.
Resulting DVD will probably not play smoothly.


Input file details are as under:-

General
Complete name : H:\Media Composer Output\Merissa_B'day_Party_Clip.m2v
Format : MPEG Video
Format version : Version 2
File size : 319 MiB
Duration : 5mn 25s
Overall bit rate : 8 221 Kbps

Video
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : Yes
Format settings, Matrix : Default
Format settings, GOP : M=2, N=15
Duration : 5mn 25s
Bit rate mode : Variable
Bit rate : 7 888 Kbps
Maximum bit rate : 9 800 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Bottom Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.762
Stream size : 306 MiB (96%)

[manono]

Did you reencode the video? If reencoded, what MPEG-2 encoder did you use? What's the source of the video? Something you created or something commercial? What's the AC3 audio's bitrate?

Anyway, the max video bitrate plus the audio bitrate plus the muxing overhead goes over the limit a number of times. I guess you were just testing the resulting Muxman VOBs, because it won't create a playable DVD with all those errors. With an average bitrate that high, many (if not most) encoders won't abide by the max bitrate you set. You'll have to reencode it using a lower max bitrate.

[Bjs]

Id check if muxman didnt barf because the video bitrate was "variable" and not constant ... that general gets a no no

[Bonie81]

Folks, thanks for your inputs.

Thanks for your suggestions.
Sorry for delay in my response!

@ manono

Did you re-encode the video? If re-encoded, what MPEG-2 encoder did you use?

-yes i did, its Sorenson squeeze the one out-of-box which squeeeeeezed me!

What's the source of the video?

- Cheap CAM Canon VIXIA m2ts --> mov.

Something you created or something commercial?

its something my cousin created, family b'day event.
non-commercial, something like Free Bytes & Beer for family and friends!

What's the AC3 audio's bit-rate?

448k - 2ch

Anyway, the max video bitrate plus the audio bitrate plus the muxing overhead goes over the limit a number of times. I guess you were just testing the resulting Muxman VOBs, because it won't create a playable DVD with all those errors. With an average bit-rate that high, many (if not most) encoders won't abide by the max bit-rate you set. You'll have to re-encode it using a lower max bit-rate.

Thanks for advice, i did re-encode at lower bit-rate.
It went pretty smooth and fine through MuxMan.

@ Bjs

Id check if Muxman didn't barf because the video bit-rate was "variable" and not constant ... that general gets a no no.

Thanks!
re-encode at 5000kbps -CBR gave me desired quality.

Thanks for looking and inputs.