static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
{
BufferSourceContext *c = ctx->priv;
+ int n = 0;
- if (args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
- return 0;
+ if (!args || (n = sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt)) != 3) {
+ av_log(ctx, AV_LOG_ERROR, "Expected 3 arguments, but only %d found in '%s'\n", n, args ? args : "");
+ return AVERROR(EINVAL);
+ }
- av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
- return -1;
+ return 0;
}
static int query_formats(AVFilterContext *ctx)