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lavfi/avfiltergraph: suggest a solution when format selection fails. 

Format selection can fail if unknown channel layouts are used
with filters that do not support it.
This commit is contained in:
Nicolas George 2013-09-03 22:12:54 +02:00 committed by Nicolas George
parent 863fb11f63
commit f775eb3fb4
1 changed files with 4 additions and 0 deletions
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4
libavfilter/avfiltergraph.c
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@ -654,6 +654,10 @@ static int pick_format(AVFilterLink *link, AVFilterLink *ref)
av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for"
" the link between filters %s and %s.\n", link->src->name,
link->dst->name);
if (!link->in_channel_layouts->all_counts)
av_log(link->src, AV_LOG_ERROR, "Unknown channel layouts not "
"supported, try specifying a channel layout using "
"'aformat=channel_layouts=something'.\n");
return AVERROR(EINVAL);
}
link->in_channel_layouts->nb_channel_layouts = 1;