Function opt_vsync

fftools/ffmpeg_opt.c:1237–1241

#if FFMPEG_OPT_VSYNC
static int opt_vsync(void *optctx, const char *opt, const char *arg)
{
    av_log(NULL, AV_LOG_WARNING, "-vsync is deprecated. Use -fps_mode\n");
    return parse_and_set_vsync(arg, &video_sync_method, -1, -1, 1);
}
#endif

static int opt_timecode(void *optctx, const char *opt, const char *arg)