[mythtv-users] Odd sync problem on ffmpeg convert of NUV files

[David Shay]

----- Original Message ----- 
From: "John Sturgeon" <mythtv at sturgeonfamily.com>
To: <ackster at gmail.com>; "Discussion about mythtv" <mythtv-users at mythtv.org>
Sent: Thursday, March 31, 2005 5:43 PM
Subject: Re: [mythtv-users] Odd sync problem on ffmpeg convert of NUV files
>
> I downloaded the file, and tcprobe -i tells me:
> [mythtv at localhost completed]$ tcprobe -i sample.mpg
> [tcprobe] MPEG program stream (PS)
> [tcprobe] summary for sample.mpg, (*) = not default, 0 = not detected
> import frame size: -g 720x480 [720x576] (*)
>     aspect ratio: 1:1
>       frame rate: -f 23.976 [25.000] frc=1 (*)
>                   PTS=0.5000, frame_time=41 ms, bitrate=104857 kbps
>      audio track: -a 0 [0] -e 48000,16,2 [48000,16,2] -n 0x50 [0x2000] (*)
>                   PTS=0.5000, bitrate=384 kbps
>                   -D 0 --av_fine_ms 0 (frames & ms) [0] [0]
>
> This tells me your bitrate is through the roof.  You probably want to
> pull your video bitrate down to the 8k range.

Actually, even on streams that I have re-encoded through mencoder or other
means and I *know* the bitrate is 4000 kbps, I get that exact bit rate
output from tcprobe -i (104857, which, in hex, is conveniently 19999).  I
would say that tcprobe -i is not reading the info correctly, or that the
encoding software is not setting the correct bits in the MPEG header
somewhere.