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vf_scale: give a clue in case of invalid expression self-reference

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Address trac ticket #706.
This commit is contained in:
Stefano Sabatini 2011-12-04 23:33:40 +01:00
parent b404ab9e74
commit 3af5ddb24b
1 changed files with 3 additions and 1 deletions
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4
libavfilter/vf_scale.c
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@ -242,7 +242,9 @@ static int config_props(AVFilterLink *outlink)
fail:
av_log(NULL, AV_LOG_ERROR,
"Error when evaluating the expression '%s'\n", expr);
"Error when evaluating the expression '%s'.\n"
"Maybe the expression for out_w:'%s' or for out_h:'%s' is self-referencing.\n",
expr, scale->w_expr, scale->h_expr);
return ret;
}