[FFmpeg-user] avoid_negative_ts : what integer ?

[sean darcy]

 From https://ffmpeg.org/ffmpeg-all.html#Format-Options :

avoid_negative_ts integer (output)

     Possible values:

     ‘make_non_negative’

         Shift timestamps to make them non-negative. Also note that this 
affects only leading negative timestamps, and not non-monotonic negative 
timestamps.
     ‘make_zero’

         Shift timestamps so that the first timestamp is 0.
     ‘auto (default)’

         Enables shifting when required by the target format.
     ‘disabled’

         Disables shifting of timestamp.

So:
-avoid_negative_ts 1  means 'make_non_negative'


or

the option is
-avoid_negative_ts make_non_negative

??