Re: [Mjpeg-users] problem with mplex

Sat, 13 Sep 2003 00:10:51 -0700

Hi Steven,

even using a bitrate of 2000 mbit/s doesn't work. I am trying the mplayer approach now.

Here what I get with mplex:

[EMAIL PROTECTED] tmp]$ mplex -f 2 -r 2000 chunk.m1v chunk.mp2 -o chunk.mpg
INFO: [mplex] mplex version 2.2.1 ($Date: 2002/02/04 19:06:14 $)
INFO: [mplex] File chunk.m1v looks like an MPEG Video stream.
INFO: [mplex] File chunk.mp2 looks like an MPEG Audio stream.
INFO: [mplex] Found 1 video streams 1 MPEG audio streams and 0 AC3 streams
INFO: [mplex] Selecting VCD output profile
INFO: [mplex] Scanning for header info: Video stream e0 (chunk.m1v)
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width : 352
INFO: [mplex] Frame height : 288
INFO: [mplex] Aspect ratio : 1:1 (square pixels)
INFO: [mplex] Picture rate : 25.000 frames/sec
INFO: [mplex] Bit rate : 1150000 bits/sec
INFO: [mplex] Vbv buffer size : 40960 bytes
INFO: [mplex] CSPF : 1
INFO: [mplex] Scanning for header info: Audio stream c0 (chunk.mp2)
INFO: [mplex] AUDIO STREAM:
INFO: [mplex] Audio version : 1.0
INFO: [mplex] Layer : 3
INFO: [mplex] CRC checksums : no
INFO: [mplex] Bit rate : 28672 bytes/sec (224 kbit/sec)
INFO: [mplex] Frequency : 44100 Hz
INFO: [mplex] Mode : 0 stereo
INFO: [mplex] Mode extension : 0
INFO: [mplex] Copyright bit : 0 no copyright
INFO: [mplex] Original/Copy : 1 original
INFO: [mplex] Emphasis : 0 none
INFO: [mplex] SYSTEMS/PROGRAM stream:
INFO: [mplex] rough-guess multiplexed stream data rate : 1410000
INFO: [mplex] target data-rate specified : 2000000
INFO: [mplex] Setting specified specified data rate: 2000000
INFO: [mplex] Sectors = 18 Video delay = 15240 Audio delay = 15240
INFO: [mplex] New sequence commences...
INFO: [mplex] Video e0: buf= 47104 frame=000000 sector=00000000
INFO: [mplex] Audio c0: buf= 4096 frame=000000 sector=00000000
INFO: [mplex] Padding : sector=00000000
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=4117599 required
(DTS)=4117536
++ WARN: [mplex] Video e0: buf= 35440 frame=001133 sector=00002775
++ WARN: [mplex] Audio c0: buf= 2990 frame=001735 sector=00000557
++ WARN: [mplex] Padding : sector=00001499
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=4371615 required
(DTS)=4362336
++ WARN: [mplex] Video e0: buf= 44799 frame=001200 sector=00003042
++ WARN: [mplex] Audio c0: buf= 4096 frame=001838 sector=00000590
++ WARN: [mplex] Padding : sector=00001499
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=5356350 required
(DTS)=5355936
++ WARN: [mplex] Video e0: buf= 30501 frame=001476 sector=00003695
++ WARN: [mplex] Audio c0: buf= 2570 frame=002262 sector=00000726
++ WARN: [mplex] Padding : sector=00001873
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=8495141 required
(DTS)=8495136
++ WARN: [mplex] Video e0: buf= 29927 frame=002348 sector=00005485
++ WARN: [mplex] Audio c0: buf= 2068 frame=003598 sector=00001155
++ WARN: [mplex] Padding : sector=00003361
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=10115763 require
d(DTS)=10115136
++ WARN: [mplex] Video e0: buf= 35543 frame=002799 sector=00006778
++ WARN: [mplex] Audio c0: buf= 2363 frame=004287 sector=00001376
++ WARN: [mplex] Padding : sector=00003761
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=10369779 require
d(DTS)=10341936
++ WARN: [mplex] Video e0: buf= 44799 frame=002861 sector=00007047
++ WARN: [mplex] Audio c0: buf= 4096 frame=004383 sector=00001407
++ WARN: [mplex] Padding : sector=00003761
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=10623795 require
d(DTS)=10521936
++ WARN: [mplex] Video e0: buf= 44808 frame=002912 sector=00007323
++ WARN: [mplex] Audio c0: buf= 4096 frame=004458 sector=00001431
++ WARN: [mplex] Padding : sector=00003761
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=10877811 require
d(DTS)=10842336
++ WARN: [mplex] Video e0: buf= 44799 frame=003000 sector=00007579
++ WARN: [mplex] Audio c0: buf= 4096 frame=004595 sector=00001475
++ WARN: [mplex] Padding : sector=00003761
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=19932635 require
d(DTS)=19932336
++ WARN: [mplex] Video e0: buf= 23950 frame=005525 sector=00013802
++ WARN: [mplex] Audio c0: buf= 2217 frame=008462 sector=00002716
++ WARN: [mplex] Padding : sector=00006991
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=27255070 require
d(DTS)=27254736
++ WARN: [mplex] Video e0: buf= 27466 frame=007559 sector=00018879
++ WARN: [mplex] Audio c0: buf= 3896 frame=011575 sector=00003715
++ WARN: [mplex] Padding : sector=00009563
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=38515599 require
d(DTS)=38515536
++ WARN: [mplex] Video e0: buf= 30994 frame=010687 sector=00024925
++ WARN: [mplex] Audio c0: buf= 2337 frame=016367 sector=00005253
++ WARN: [mplex] Padding : sector=00015278
**ERROR: [mplex] Too many frame drops -exiting

Ralf



Steven M. Schultz wrote:

On Wed, 10 Sep 2003, Ralf Haller wrote:



Hi Berni,

here's what I get when I am multiplexing a custom VDC with higher bitrate:

[EMAIL PROTECTED] tmp]$ mplex -f 2 -r 1500 chunk.m1v chunk.mp2 -o chunk.mpg


...



++ WARN: [mplex] Padding : sector=00000000
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=572382 required(
DTS)=564048
++ WARN: [mplex] Video e0: buf= 44799 frame=000141 sector=00000386
++ WARN: [mplex] Audio c0: buf= 4096 frame=000218 sector=00000070
++ WARN: [mplex] Padding : sector=00000019
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=946068




[EMAIL PROTECTED] tmp]$ ffmpeg -i test.mpg -b 1150 -s 352x288 -r 25 -ab 224 -ar
44100 -f vcd -y out.mpg



    1500 is too low.   ffmpeg's mpeg capability is not as refined as
        that of mpeg2enc (at least when it comes to the rate control or so
        it would seem).

Perhaps using mpeg2enc as has been suggested would be a better method of preparing the .m1v file

        Use '-r 2500' or higher and see what mplex prints out for the
        Average and Peak rates.

        Cheers,
        Steven Schultz



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