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avfilter/vf_xstack: set better error msg for 

missing layout
This commit is contained in:
Gyan Doshi 2019-05-07 16:00:40 +05:30
parent e25bddf5fc
commit b3b7ba623f
1 changed files with 10 additions and 1 deletions
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11
libavfilter/vf_stack.c
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@ -83,6 +83,15 @@ static av_cold int init(AVFilterContext *ctx)
return AVERROR(ENOMEM);
if (!strcmp(ctx->filter->name, "xstack")) {
if (!s->layout) {
if (s->nb_inputs == 2)
s->layout = "0_0|w0_0";
else {
av_log(ctx, AV_LOG_ERROR, "No layout specified.\n");
return AVERROR(EINVAL);
}
}
s->items = av_calloc(s->nb_inputs, sizeof(*s->items));
if (!s->items)
return AVERROR(ENOMEM);
@ -385,7 +394,7 @@ AVFilter ff_vf_vstack = {
static const AVOption xstack_options[] = {
{ "inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64=2}, 2, INT_MAX, .flags = FLAGS },
{ "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str="0_0|w0_0"}, 0, 0, .flags = FLAGS },
{ "layout", "set custom layout", OFFSET(layout), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, .flags = FLAGS },
{ "shortest", "force termination when the shortest input terminates", OFFSET(shortest), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, .flags = FLAGS },
{ NULL },
};