On Sat, 23 Oct 2004, Reuben wrote:
> I don't know whether this a transcode or mplex question, but here goes:
> (DTS)=3324900
> ++ WARN: [mplex] Video e0: buf= 233219 frame=000874 sector=00005401
> ++ WARN: [mplex] Audio c0: buf= 4096 frame=001395 sector=00000127
> ++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=3763800
> required(DTS)=3594900++ WARN:
> [mplex] Video e0: buf= 233219 frame=000946 sector=00005690++ WARN:
> [mplex] Audio c0: buf= 4096 frame=001516 sector=00000138**ERROR:
> [mplex] Too many frame drops -exiting
That type of error is almost ALWAYS due to the bitrate of the video
being higher than the default mplex is using.
> The process worked fine for a shorter clip, but this is a full hour long
> documentary. My guess (after some googling) is that this has to do with
> the bit rate on the MP3, which is pretty low (64) compared to the bit
> rate (auto) on the video. Perhaps the discrepency is too wide to
No, the audio rate has nothing to do with the problem - mplex doesn't
care if you're using a low rate for the audio.
> Here's the transcode infos:
>
> INFO: Min bitrate of any one frame = 1158 bits
> INFO: Max bitrate of any one frame = 393415 bits
> INFO: Min bitrate over any one second = 121372 bps
> INFO: Avg bitrate over any one second = 1883342 bps
> INFO: Max bitrate over any one second = 6786088 bps
> INFO: Total time: 20693 seconds (05:44:53), 3.09 frames/sec, 0.324
> sec/frame.
Depending on the mplex command you used (which I didn't see
mentioned in the mail item) the default bitrate that mplex is using
is too low. Try using the '-r' option to mplex to increase the
bitrate. I'd try "-r 2000" first and then gradually increase that
until the errors go away.
If you're creating a VCD then the average bitrate of the video is
much too high (VCDs have a max bitrate of around 1150 Kb/s).
Cheers,
Steven Schultz
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