![]() the stream specifier in "-b:a 128k" matches all audioĪn empty stream specifier matches all streams. Would select the ac3 codec for the second audio stream.Ī stream specifier can match several streams, so that the option is applied to all "a:1" stream specifier, which matches the second audio stream. ![]() Stream specifiersĪre used to precisely specify which stream(s) a given option belongs to.Ī stream specifier is a string generally appended to the option name and Some options are applied per-stream, e.g.
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