void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove){

    int i;



    s->dts= s->pts= AV_NOPTS_VALUE;

    s->offset= 0;

    for(i = 0; i < AV_PARSER_PTS_NB; i++) {

        if (   s->next_frame_offset + off >= s->cur_frame_offset[i]

            &&(s->     frame_offset       <  s->cur_frame_offset[i] || !s->frame_offset)

            

            &&   s->cur_frame_end[i]){

            s->dts= s->cur_frame_dts[i];

            s->pts= s->cur_frame_pts[i];

            s->offset = s->next_frame_offset - s->cur_frame_offset[i];

            if(remove)

                s->cur_frame_offset[i]= INT64_MAX;

        }

    }

}
