[FFmpeg-user] Negative "start"

[double]

Hello,

A dumped stream has a start value "-1696.36".
Is there a parameter to start the video from zero? Otherwise
ffmpeg will create 1,656 empty seconds.

Thanks a lot
Marcus

Command-line (file has 1MB):
ffmpeg   -i   http://doppelbauer.name/negative-dts.flv   test.wmv

[flv @ 0x912f260] negative cts, previous timestamps might be wrong
Input #0, flv, from 'http://doppelbauer.name/negative-dts.flv':
   Duration: 00:00:05.30, start: -1696.360000, bitrate: 1625 kb/s
     Stream #0:0: Video: h264 (Baseline), yuv420p, 720x574 [SAR 1:1 DAR 
360:287], 50 tbr, 1k tbn, 50 tbc
     Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16, 192 kb/s