Information such as video dimension or audio sample rate must be present.
U Matches streams with usable configuration, the codec must be defined and the essential
Given, matches streams that contain the given tag with any value. Matches streams with the metadata tag key having the specified value. Otherwise, it matches all streams in the program. If stream_index is given, then it matches the stream with number stream_index in the Otherwise, it matches all streams of this type. If stream_index is given, then it matches stream number stream_index of this Only matches video streams which are not attached pictures, video thumbnails or coverĪrts. Subtitle, 'd' for data, and 't' for attachments. Stream_type stream_type is one of following: 'v' or 'V' for video, 'a' for audio, 's' for "-threads:1 4" would set the thread count for For example, "-codec copy" or "-codec:Ĭopy" would copy all the streams without reencoding. the stream specifier in "-b:a 128k" matches all audio streams.Īn empty stream specifier matches all streams. Therefore, it 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 of "-codec:a:1 ac3" contains the "a:1" stream specifier, which matches the Precisely specify which stream(s) a given option belongs to.Ī stream specifier is a string generally appended to the option name and separated from itīy a colon. Some options are applied per-stream, e.g. Using "-nofoo" will set the boolean option with name "foo" to false. They can be set to false by prefixing the option name with "no". Options which do not take arguments are boolean options, and set the corresponding value This allows using,įor example: 'KB', 'MiB', 'G' and 'B' as number suffixes. Appending 'B' to the SI unit prefix multiplies the value by 8. Unit prefix for binary multiples, which are based on powers of 1024 instead of powers ofġ000. If 'i' is appended to the SI unit prefix, the complete prefix will be interpreted as a Number as input, which may be followed by one of the SI unit prefixes, for example: 'K', It is mostly used as a testbed for the various FFmpeg APIs.Īll the numerical options, if not specified otherwise, accept a string representing a FFplay is a very simple and portable media player using the FFmpeg libraries and the SDL
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