int ff_dualinput_init(AVFilterContext *ctx, FFDualInputContext *s)
{
- FFFrameSyncIn *in = s->fs.in;
+ FFFrameSyncIn *in;
+ int ret;
- ff_framesync_init(&s->fs, ctx, 2);
+ if ((ret = ff_framesync_init(&s->fs, ctx, 2)) < 0)
+ return ret;
+
+ in = s->fs.in;
s->fs.opaque = s;
s->fs.on_event = process_frame;
in[0].time_base = ctx->inputs[0]->time_base;