Anton Khirnov 5c36f4ef84 lavu/opt: use AV_DICT_MULTIKEY in av_opt_set_dict2() ...

If the dictionary provided on input contains multiple entries for an
option (relevant for flags modifying the previous value with '+' or
'-') and the option is not found in the target object, only the last
entry would be returned to the caller.

Pass AV_DICT_MULTIKEY to av_dict_set() to make sure all such entries are
returned.

2023-01-31 09:08:03 +01:00

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