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View Full Version : [MuxMan] Video decoder buffer underflowed 1 times.


Kitt0s
13th December 2005, 17:38
Video decoder buffer underflowed 1 times.
Check C:\Muxman.log for details.
Resulting DVD will probably not play smoothly.

now, huh?!?!? it works ok, dunno if smoothly - should i worry?

18:10:55 Begin multiplex.
Maximum audio duration 364624 fields.
Starting scene Segment_1_scn1 at 00:00:00:00
Starting scene Segment_1_scn2 at 00:03:59:18
Starting scene Segment_1_scn3 at 00:06:01:10
Starting scene Segment_1_scn4 at 00:07:13:04
Starting scene Segment_1_scn5 at 00:14:09:04
Starting scene Segment_1_scn6 at 00:16:23:08
Starting scene Segment_1_scn7 at 00:17:23:03
Unexpected picture_coding_extension. Video offset 424437077, lba 323483.
Starting scene Segment_1_scn8 at 00:20:46:24
Starting scene Segment_1_scn9 at 00:23:24:13
Starting scene Segment_1_scn10 at 00:28:14:04
Starting scene Segment_1_scn11 at 00:29:10:08
Starting scene Segment_1_scn12 at 00:31:49:11
Starting scene Segment_1_scn13 at 00:35:54:09
Starting scene Segment_1_scn14 at 00:40:37:06
Starting scene Segment_1_scn15 at 00:41:43:20
Starting scene Segment_1_scn16 at 00:45:44:01
Starting scene Segment_1_scn17 at 00:48:13:07
Starting scene Segment_1_scn18 at 00:52:08:21
Starting scene Segment_1_scn19 at 00:55:04:15
Starting scene Segment_1_scn20 at 00:59:12:03
Starting scene Segment_1_scn21 at 01:01:39:20
Starting scene Segment_1_scn22 at 01:02:55:05
Starting scene Segment_1_scn23 at 01:04:38:17
Starting scene Segment_1_scn24 at 01:11:39:09
Starting scene Segment_1_scn25 at 01:17:13:18
Starting scene Segment_1_scn26 at 01:20:38:15
Starting scene Segment_1_scn27 at 01:21:33:05
Unexpected picture_coding_extension. Video offset 1777159646, lba 1362983.
Starting scene Segment_1_scn28 at 01:24:36:06
Starting scene Segment_1_scn29 at 01:29:16:00
Starting scene Segment_1_scn30 at 01:30:06:11
Starting scene Segment_1_scn31 at 01:32:47:03
Starting scene Segment_1_scn32 at 01:34:58:17
Starting scene Segment_1_scn33 at 01:36:43:18
Starting scene Segment_1_scn34 at 01:39:47:07
Unexpected picture_coding_extension. Video offset 2161941544, lba 1665895.
Starting scene Segment_1_scn35 at 01:46:21:24
Starting scene Segment_1_scn36 at 01:48:26:06
Starting scene Segment_1_scn37 at 01:52:07:19
P-STD buffer underflow by 16974 bytes at 613656092, sector 1876213.
Starting scene Segment_1_scn38 at 01:56:57:23
Starting scene Segment_1_scn39 at 02:01:31:24
SeqEnd at 9CF631AB.
Bytes remaining in buffer = 16974.
18:32:54 End multiplex.
Bitrate - avg: 4530277, min: 2678153 (lba 1930703), max: 10618092 (lba 274778).
Shortest GOP has 26 fields, longest GOP has 26 fields.
Fields: 364624, VOBU: 14024, Sectors: 2016416.

mpucoder
13th December 2005, 17:50
It means the bitrate was too high for a short peak, and the data, using the P-STD buffer model, arrives after the time to present it to the decoder. Modern players have larger buffers than the model and read ahead, so it should play on all but old players built to the minimum requirements.

Kitt0s
13th December 2005, 17:53
meaning - on chapter 37 (Segment_1_scn37) - on old players will not play so smooth, and on good players will play allright? so i don't see much problem..

btw, when it says Too Many Frame Drops = is just like my case but witch much more underbuffers?

how could i prevent this of happening?

mpucoder
13th December 2005, 18:05
MuxMan doesn't have such an error, that is mplex (IfoEdit, DVDAuthor) that gives that error.