> Ok, "generic MPEG-1" at a 1Mb/s rate. That does seem a bit low
> for 800x600.
Should I raise it?
> Ah, so the video is for "computer playback" only. That's not a
> framesize that is suitable for VCD/DVD use (and MP3 audio couldn't be
used for (S)VCD or DVD)
Right! I am trying to get the playback using SMPEG for the SDL library. I
have tested with some mpeg files off the net and the player works fine my
issues has been mainly associated with the audio. I am trying to record a
voice over for the video using audacity, I have some posts going on in
that mailing list as well. Anyway, getting mp3 out of audacity properly
was a problem so I exported as a WAV and then used cinelerra to render the
video and audio into the final(.m1v and .mp3) files. I have used mplex
for smaller video files and existing mp3 files on my system with the above
method and it worked fine (for nothing longer than 30s to 1min). Anyway,
I am thinking that the problem has to do with audio. But, I do not know
enough to really make that statement. Also, is there a way that I can
mplex using a null audio source?
>
> mplex -f 0 -r 1200 -o 3mintest.mpg final.m1v final.mp3
>
> should work better. What is needed is the "-r" option that is the sum
of the audio and video bitrates plus a little extra to account for
overhead and peaks. If you still get an underrun error or two try bumping
up the value used with -r to 1300.
I tried both 1200 and 1300 no luck...
The bit rate for the mp3 is interesting becuase I thought it was rendered
as 256(Kbs), Thoughts?
The relivant output:
$ mplex -f 0 -r 1300 -o 3mintest.mpg final.m1v final.mp3
INFO: [mplex] mplex version 1.6.2 (2.2.3 $Date: 2004/01/13 20:45:26 $)
INFO: [mplex] File final.m1v looks like an MPEG Video stream.
INFO: [mplex] File final.mp3 looks like an MPEG Audio stream.
INFO: [mplex] Found 1 audio streams and 1 video streams
INFO: [mplex] Selecting generic MPEG1 output profile
INFO: [mplex] Multiplexing video program stream!
INFO: [mplex] Scanning for header info: Video stream e0 (final.m1v)
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width : 800
INFO: [mplex] Frame height: 600
INFO: [mplex] Aspect ratio: 1:0.6735
INFO: [mplex] Picture rate: b reserved
INFO: [mplex] Bit rate: 100 bits/sec
INFO: [mplex] Vbv buffer size : 1222656 bytes
INFO: [mplex] CSPF: 0
INFO: [mplex] Scanning for header info: Audio stream c0 (final.mp3)
INFO: [mplex] MPEG AUDIO STREAM: c0
INFO: [mplex] Audio version : 1.0
INFO: [mplex] Layer :3
INFO: [mplex] CRC checksums : no
INFO: [mplex] Bit rate :16384 bytes/sec (128 kbit/sec) INFO:
[mplex] Frequency : 48000 Hz
INFO: [mplex] Mode :1 joint stereo
INFO: [mplex] Mode extension :2
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: 1155496
INFO: [mplex] target data-rate specified : 130 INFO:
[mplex] Setting specified specified data rate: 130
INFO: [mplex] Run-in Sectors = 21 Video delay = 23819 Audio delay =
27419 INFO: [mplex] New sequence commences...
INFO: [mplex] Video e0: buf= 47104 frame=00 sector= INFO:
[mplex] Audio c0: buf= 4096 frame=00 sector= INFO:
[mplex] Padding : sector=
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=23819
required(DTS)=23819
...
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