[FFmpeg-devel] [PATCH 1/2] avfilter: Dry run mode for list merging

[Nicolas George]

Le quartidi 4 thermidor, an CCXXI, Michael Niedermayer a écrit :
>  AVFilterFormats *ff_merge_formats(AVFilterFormats *a, AVFilterFormats *b,
> -                                  enum AVMediaType type)
> +                                  enum AVMediaType type, int dry_run)
>  {

Wouldn't it be simpler to have

ff_try_merge_formats(a, b, type);

that will allocate a copy of a and b with dummy back-references and pass it
to ff_merge_formats?

For reference, the problem with the channel layouts is that the algorithm
currently overwrites its inputs. It does so only when success is certain
(exccept for OOM), but that will not do for dry-run.

Regards,

-- 
  Nicolas George
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