- en: torio::io::StreamingMediaDecoder
  id: totrans-0
  prefs:
  - PREF_H1
  type: TYPE_NORMAL
  zh: torio::io::StreamingMediaDecoder
- en: 原文：[https://pytorch.org/audio/stable/libtorio.stream_reader.html](https://pytorch.org/audio/stable/libtorio.stream_reader.html)
  id: totrans-1
  prefs:
  - PREF_BQ
  type: TYPE_NORMAL
  zh: 原文：[https://pytorch.org/audio/stable/libtorio.stream_reader.html](https://pytorch.org/audio/stable/libtorio.stream_reader.html)
- en: Warning
  id: totrans-2
  prefs: []
  type: TYPE_NORMAL
  zh: 警告
- en: TorchAudio’s C++ API is a prototype feature. API/ABI backward compatibility
    is not guaranteed.
  id: totrans-3
  prefs: []
  type: TYPE_NORMAL
  zh: TorchAudio 的 C++ API 是一个原型功能。API/ABI 的向后兼容性不能保证。
- en: Note
  id: totrans-4
  prefs: []
  type: TYPE_NORMAL
  zh: 注意
- en: The top-level namespace has been changed from `torchaudio` to `torio`. `StreamReader`
    has been renamed to `StreamingMediaDecoder`.
  id: totrans-5
  prefs: []
  type: TYPE_NORMAL
  zh: 顶层命名空间已从 `torchaudio` 更改为 `torio`。`StreamReader` 已重命名为 `StreamingMediaDecoder`。
- en: '`StreamingMediaDecoder` is the implementation used by Python equivalent and
    provides similar interface. When working with custom I/O, such as in-memory data,
    `StreamingMediaDecoderCustomIO` class can be used.'
  id: totrans-6
  prefs: []
  type: TYPE_NORMAL
  zh: '`StreamingMediaDecoder` 是 Python 等效的实现，提供类似的接口。在使用自定义 I/O（例如内存数据）时，可以使用 `StreamingMediaDecoderCustomIO`
    类。'
- en: Both classes have the same methods defined, so their usages are the same.
  id: totrans-7
  prefs: []
  type: TYPE_NORMAL
  zh: 这两个类定义了相同的方法，因此它们的用法相同。
- en: Constructors[](#constructors "Permalink to this heading")
  id: totrans-8
  prefs:
  - PREF_H2
  type: TYPE_NORMAL
  zh: 构造函数：
- en: StreamingMediaDecoder[](#streamingmediadecoder "Permalink to this heading")
  id: totrans-9
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder
- en: class  StreamingMediaDecoder[](#_CPPv4N5torio2io21StreamingMediaDecoderE "Permalink
    to this definition")
  id: totrans-10
  prefs: []
  type: TYPE_NORMAL
  zh: 类 `StreamingMediaDecoder`：
- en: Fetch and decode audio/video streams chunk by chunk.
  id: totrans-11
  prefs: []
  type: TYPE_NORMAL
  zh: 逐块获取和解码音频/视频流。
- en: Subclassed by [torio::io::StreamingMediaDecoderCustomIO](#classtorio_1_1io_1_1StreamingMediaDecoderCustomIO)
  id: totrans-12
  prefs: []
  type: TYPE_NORMAL
  zh: 由 [torio::io::StreamingMediaDecoderCustomIO](#classtorio_1_1io_1_1StreamingMediaDecoderCustomIO)
    继承
- en: explicit  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::StreamingMediaDecoder(const  std::string  &src,
    const  c10::optional<std::string>  &format  =  c10::nullopt, const  c10::optional<OptionDict>  &option  =  c10::nullopt)[](#_CPPv4N5torio2io21StreamingMediaDecoder21StreamingMediaDecoderERKNSt6stringERKN3c108optionalINSt6stringEEERKN3c108optionalI10OptionDictEE
    "Permalink to this definition")
  id: totrans-13
  prefs: []
  type: TYPE_NORMAL
  zh: explicit  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::StreamingMediaDecoder(const  std::string  &src,
    const  c10::optional<std::string>  &format  =  c10::nullopt, const  c10::optional<OptionDict>  &option  =  c10::nullopt)
- en: Construct media processor from soruce URI.
  id: totrans-14
  prefs: []
  type: TYPE_NORMAL
  zh: 从源 URI 构造媒体处理器。
- en: 'Parameters:'
  id: totrans-15
  prefs: []
  type: TYPE_NORMAL
  zh: 参数：
- en: '**src** – URL of source media, in the format FFmpeg can understand.'
  id: totrans-16
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**src** – 源媒体的 URL，格式为 FFmpeg 可理解的格式。'
- en: '**format** – Specifies format (such as mp4) or device (such as lavfi and avfoundation)'
  id: totrans-17
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**format** – 指定格式（如 mp4）或设备（如 lavfi 和 avfoundation）。'
- en: '**option** – Custom option passed when initializing format context (opening
    source).'
  id: totrans-18
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**option** – 在初始化格式上下文（打开源）时传递的自定义选项。'
- en: StreamingMediaDecoderCustomIO[](#streamingmediadecodercustomio "Permalink to
    this heading")
  id: totrans-19
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: StreamingMediaDecoderCustomIO
- en: 'class  StreamingMediaDecoderCustomIO  :  private  detail::CustomInput,  public  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")[](#_CPPv4N5torio2io29StreamingMediaDecoderCustomIOE
    "Permalink to this definition")'
  id: totrans-20
  prefs: []
  type: TYPE_NORMAL
  zh: 类 `StreamingMediaDecoderCustomIO`：继承自 private detail::CustomInput，公开 torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")
- en: A subclass of [StreamingMediaDecoder](#classtorio_1_1io_1_1StreamingMediaDecoder)
    which works with custom read function. Can be used for decoding media from memory
    or custom object.
  id: totrans-21
  prefs: []
  type: TYPE_NORMAL
  zh: '[StreamingMediaDecoder](#classtorio_1_1io_1_1StreamingMediaDecoder) 的子类，与自定义读取函数一起工作。可用于从内存或自定义对象解码媒体。'
- en: torio::io::[StreamingMediaDecoderCustomIO](#_CPPv4N5torio2io29StreamingMediaDecoderCustomIOE
    "torio::io::StreamingMediaDecoderCustomIO")::StreamingMediaDecoderCustomIO(void  *opaque,
    const  c10::optional<std::string>  &format, int  buffer_size, int  (*read_packet)(void  *opaque,  uint8_t  *buf,  int  buf_size),
    int64_t  (*seek)(void  *opaque,  int64_t  offset,  int  whence)  =  nullptr, const  c10::optional<OptionDict>  &option  =  c10::nullopt)[](#_CPPv4N5torio2io29StreamingMediaDecoderCustomIO29StreamingMediaDecoderCustomIOEPvRKN3c108optionalINSt6stringEEEiPFiPvP7uint8_tiEPF7int64_tPv7int64_tiERKN3c108optionalI10OptionDictEE
    "Permalink to this definition")
  id: totrans-22
  prefs: []
  type: TYPE_NORMAL
  zh: torio::io::[StreamingMediaDecoderCustomIO](#_CPPv4N5torio2io29StreamingMediaDecoderCustomIOE
    "torio::io::StreamingMediaDecoderCustomIO")::StreamingMediaDecoderCustomIO(void  *opaque,
    const  c10::optional<std::string>  &format, int  buffer_size, int  (*read_packet)(void  *opaque,  uint8_t  *buf,  int  buf_size),
    int64_t  (*seek)(void  *opaque,  int64_t  offset,  int  whence)  =  nullptr, const  c10::optional<OptionDict>  &option  =  c10::nullopt)
- en: Construct [StreamingMediaDecoder](#classtorio_1_1io_1_1StreamingMediaDecoder)
    with custom read and seek functions.
  id: totrans-23
  prefs: []
  type: TYPE_NORMAL
  zh: 使用自定义读取和寻址函数构造 [StreamingMediaDecoder](#classtorio_1_1io_1_1StreamingMediaDecoder)。
- en: 'Parameters:'
  id: totrans-24
  prefs: []
  type: TYPE_NORMAL
  zh: 参数：
- en: '**opaque** – Custom data used by `read_packet` and `seek` functions.'
  id: totrans-25
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**opaque** – `read_packet` 和 `seek` 函数使用的自定义数据。'
- en: '**format** – Specify input format.'
  id: totrans-26
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**format** – 指定输入格式。'
- en: '**buffer_size** – The size of the intermediate buffer, which FFmpeg uses to
    pass data to function read_packet.'
  id: totrans-27
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**buffer_size** – 中间缓冲区的大小，FFmpeg 用于将数据传递给 read_packet 函数。'
- en: '**read_packet** – Custom read function that is called from FFmpeg to read data
    from the destination.'
  id: totrans-28
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**read_packet** – 自定义读取函数，由 FFmpeg 调用以从目标读取数据。'
- en: '**seek** – Optional seek function that is used to seek the destination.'
  id: totrans-29
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**seek** – 可选的寻址函数，用于寻址目标。'
- en: '**option** – Custom option passed when initializing format context.'
  id: totrans-30
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**option** – 在初始化格式上下文时传递的自定义选项。'
- en: Query Methods[](#query-methods "Permalink to this heading")
  id: totrans-31
  prefs:
  - PREF_H2
  type: TYPE_NORMAL
  zh: 查询方法：
- en: find_best_audio_stream[](#find-best-audio-stream "Permalink to this heading")
  id: totrans-32
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: find_best_audio_stream
- en: int64_t  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::find_best_audio_stream()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder22find_best_audio_streamEv
    "Permalink to this definition")
  id: totrans-33
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的find_best_audio_stream()方法
- en: Find a suitable audio stream using heuristics from ffmpeg.
  id: totrans-34
  prefs: []
  type: TYPE_NORMAL
  zh: 使用ffmpeg的启发式方法找到合适的音频流。
- en: If successful, the index of the best stream (>=0) is returned. Otherwise a negative
    value is returned.
  id: totrans-35
  prefs: []
  type: TYPE_NORMAL
  zh: 如果成功，返回最佳流的索引（大于等于0）。否则返回负值。
- en: find_best_video_stream[](#find-best-video-stream "Permalink to this heading")
  id: totrans-36
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: find_best_video_stream
- en: int64_t  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::find_best_video_stream()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder22find_best_video_streamEv
    "Permalink to this definition")
  id: totrans-37
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的find_best_video_stream()方法
- en: Find a suitable video stream using heuristics from ffmpeg.
  id: totrans-38
  prefs: []
  type: TYPE_NORMAL
  zh: 使用ffmpeg的启发式方法找到合适的视频流。
- en: If successful, the index of the best stream (0>=) is returned. otherwise a negative
    value is returned.
  id: totrans-39
  prefs: []
  type: TYPE_NORMAL
  zh: 如果成功，返回最佳流的索引（大于等于0）。否则返回负值。
- en: get_metadata[](#get-metadata "Permalink to this heading")
  id: totrans-40
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: get_metadata
- en: OptionDict  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::get_metadata()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder12get_metadataEv
    "Permalink to this definition")
  id: totrans-41
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的get_metadata()方法
- en: Fetch metadata of the source media.
  id: totrans-42
  prefs: []
  type: TYPE_NORMAL
  zh: 获取源媒体的元数据。
- en: num_src_streams[](#num-src-streams "Permalink to this heading")
  id: totrans-43
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: num_src_streams
- en: int64_t  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::num_src_streams()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder15num_src_streamsEv
    "Permalink to this definition")
  id: totrans-44
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的num_src_streams()方法
- en: Fetch the number of source streams found in the input media.
  id: totrans-45
  prefs: []
  type: TYPE_NORMAL
  zh: 获取输入媒体中找到的源流数量。
- en: The source streams include not only audio/video streams but also subtitle and
    others.
  id: totrans-46
  prefs: []
  type: TYPE_NORMAL
  zh: 源流不仅包括音频/视频流，还包括字幕等。
- en: get_src_stream_info[](#get-src-stream-info "Permalink to this heading")
  id: totrans-47
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: get_src_stream_info
- en: '[SrcStreamInfo](#_CPPv4N5torio2io13SrcStreamInfoE "torio::io::SrcStreamInfo")  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::get_src_stream_info(int  i)  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder19get_src_stream_infoEi
    "Permalink to this definition")'
  id: totrans-48
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的get_src_stream_info()方法
- en: Fetch information about the specified source stream.
  id: totrans-49
  prefs: []
  type: TYPE_NORMAL
  zh: 获取指定源流的信息。
- en: The valid value range is `[0, [num_src_streams()](#classtorio_1_1io_1_1StreamingMediaDecoder_1a6b3e5fd480cc50ee5ec9b389641c4512))`.
  id: totrans-50
  prefs: []
  type: TYPE_NORMAL
  zh: 有效值范围为`[0, num_src_streams()]`。
- en: num_out_streams[](#num-out-streams "Permalink to this heading")
  id: totrans-51
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: num_out_streams
- en: int64_t  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::num_out_streams()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder15num_out_streamsEv
    "Permalink to this definition")
  id: totrans-52
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的num_out_streams()方法
- en: Fetch the number of output streams defined by client code.
  id: totrans-53
  prefs: []
  type: TYPE_NORMAL
  zh: 获取客户端代码定义的输出流数量。
- en: get_out_stream_info[](#get-out-stream-info "Permalink to this heading")
  id: totrans-54
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: get_out_stream_info
- en: '[OutputStreamInfo](#_CPPv4N5torio2io16OutputStreamInfoE "torio::io::OutputStreamInfo")  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::get_out_stream_info(int  i)  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder19get_out_stream_infoEi
    "Permalink to this definition")'
  id: totrans-55
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的get_out_stream_info()方法
- en: Fetch information about the specified output stream.
  id: totrans-56
  prefs: []
  type: TYPE_NORMAL
  zh: 获取指定输出流的信息。
- en: The valid value range is `[0, [num_out_streams()](#classtorio_1_1io_1_1StreamingMediaDecoder_1a2675b80361ce5ac9da29bb63105f1135))`.
  id: totrans-57
  prefs: []
  type: TYPE_NORMAL
  zh: 有效值范围为`[0, num_out_streams()]`。
- en: is_buffer_ready[](#is-buffer-ready "Permalink to this heading")
  id: totrans-58
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: is_buffer_ready
- en: bool  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::is_buffer_ready()  const[](#_CPPv4NK5torio2io21StreamingMediaDecoder15is_buffer_readyEv
    "Permalink to this definition")
  id: totrans-59
  prefs: []
  type: TYPE_NORMAL
  zh: StreamingMediaDecoder类中的is_buffer_ready()方法
- en: Check if all the buffers of the output streams have enough decoded frames.
  id: totrans-60
  prefs: []
  type: TYPE_NORMAL
  zh: 检查输出流的所有缓冲区是否有足够的解码帧。
- en: Configure Methods[](#configure-methods "Permalink to this heading")
  id: totrans-61
  prefs:
  - PREF_H2
  type: TYPE_NORMAL
  zh: 配置方法
- en: add_audio_stream[](#add-audio-stream "Permalink to this heading")
  id: totrans-62
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: add_audio_stream
- en: void  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::add_audio_stream(int64_t  i, int64_t  frames_per_chunk,
    int64_t  num_chunks, const  c10::optional<std::string>  &filter_desc  =  c10::nullopt,
    const  c10::optional<std::string>  &decoder  =  c10::nullopt, const  c10::optional<OptionDict>  &decoder_option  =  c10::nullopt)[](#_CPPv4N5torio2io21StreamingMediaDecoder16add_audio_streamE7int64_t7int64_t7int64_tRKN3c108optionalINSt6stringEEERKN3c108optionalINSt6stringEEERKN3c108optionalI10OptionDictEE
    "Permalink to this definition")
  id: totrans-63
  prefs: []
  type: TYPE_NORMAL
  zh: void  torio::io::[StreamingMediaDecoder](#_CPPv4N5torio2io21StreamingMediaDecoderE
    "torio::io::StreamingMediaDecoder")::add_audio_stream(int64_t  i, int64_t  frames_per_chunk,
    int64_t  num_chunks, const  c10::optional<std::string>  &filter_desc  =  c10::nullopt,
    const  c10::optional<std::string>  &decoder  =  c10::nullopt, const  c10::optional<OptionDict>  &decoder_option  =  c10::nullopt)[](#_CPPv4N5torio2io21StreamingMediaDecoder16add_audio_streamE7int64_t7int64_t7int64_tRKN3c108optionalINSt6stringEEERKN3c108optionalINSt6stringEEERKN3c108optionalI10OptionDictEE
    "此定义的永久链接")
- en: Define an output audio stream.
  id: totrans-64
  prefs: []
  type: TYPE_NORMAL
  zh: 定义一个输出音频流。
- en: 'Parameters:'
  id: totrans-65
  prefs: []
  type: TYPE_NORMAL
  zh: 参数：
- en: '**i** – The index of the source stream.'
  id: totrans-66
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**i** – 源流的索引。'
- en: '**frames_per_chunk** – Number of frames returned as one chunk.'
  id: totrans-67
  prefs:
  - PREF_UL
  type: TYPE_NORMAL
  zh: '**每块帧数** – 作为一个块返回的帧数。'
- en: If a source stream is exhausted before `frames_per_chunk` frames are buffered,
    the chunk is returned as-is. Thus the number of frames in the chunk may be smaller
    than [PRE0]
  id: totrans-68
  prefs:
  - PREF_IND
  type: TYPE_NORMAL
  zh: 如果源流在缓冲`frames_per_chunk`帧之前耗尽，则该块将原样返回。因此，块中的帧数可能小于[PRE0]
- en: '{'
  id: totrans-69
  prefs: []
  type: TYPE_NORMAL
  zh: '{'
- en: '"title": "foo",'
  id: totrans-70
  prefs: []
  type: TYPE_NORMAL
  zh: '"title": "foo",'
- en: '"artist": "bar",'
  id: totrans-71
  prefs: []
  type: TYPE_NORMAL
  zh: '"艺术家": "bar",'
- en: '"date": "2017"'
  id: totrans-72
  prefs: []
  type: TYPE_NORMAL
  zh: '"日期": "2017"'
- en: '}'
  id: totrans-73
  prefs: []
  type: TYPE_NORMAL
  zh: '}'
- en: '```'
  id: totrans-74
  prefs: []
  type: TYPE_NORMAL
  zh: '```'
- en: AUDIO-SPECIFIC MEMBERS
  id: totrans-75
  prefs: []
  type: TYPE_NORMAL
  zh: 音频特定成员
- en: double  sample_rate  =  0[](#_CPPv4N5torio2io13SrcStreamInfo11sample_rateE "Permalink
    to this definition")
  id: totrans-76
  prefs: []
  type: TYPE_NORMAL
  zh: double  采样率  =  0[](#_CPPv4N5torio2io13SrcStreamInfo11sample_rateE "此定义的永久链接")
- en: Sample rate.
  id: totrans-77
  prefs: []
  type: TYPE_NORMAL
  zh: 采样率。
- en: int  num_channels  =  0[](#_CPPv4N5torio2io13SrcStreamInfo12num_channelsE "Permalink
    to this definition")
  id: totrans-78
  prefs: []
  type: TYPE_NORMAL
  zh: int  通道数  =  0[](#_CPPv4N5torio2io13SrcStreamInfo12num_channelsE "此定义的永久链接")
- en: The number of channels.
  id: totrans-79
  prefs: []
  type: TYPE_NORMAL
  zh: 通道数。
- en: VIDEO-SPECIFIC MEMBERS
  id: totrans-80
  prefs: []
  type: TYPE_NORMAL
  zh: 视频特定成员
- en: int  width  =  0[](#_CPPv4N5torio2io13SrcStreamInfo5widthE "Permalink to this
    definition")
  id: totrans-81
  prefs: []
  type: TYPE_NORMAL
  zh: int  宽度  =  0[](#_CPPv4N5torio2io13SrcStreamInfo5widthE "此定义的永久链接")
- en: Width.
  id: totrans-82
  prefs: []
  type: TYPE_NORMAL
  zh: 宽度。
- en: int  height  =  0[](#_CPPv4N5torio2io13SrcStreamInfo6heightE "Permalink to this
    definition")
  id: totrans-83
  prefs: []
  type: TYPE_NORMAL
  zh: int  高度  =  0[](#_CPPv4N5torio2io13SrcStreamInfo6heightE "此定义的永久链接")
- en: Height.
  id: totrans-84
  prefs: []
  type: TYPE_NORMAL
  zh: 高度。
- en: double  frame_rate  =  0[](#_CPPv4N5torio2io13SrcStreamInfo10frame_rateE "Permalink
    to this definition")
  id: totrans-85
  prefs: []
  type: TYPE_NORMAL
  zh: double  帧率  =  0[](#_CPPv4N5torio2io13SrcStreamInfo10frame_rateE "此定义的永久链接")
- en: Frame rate.
  id: totrans-86
  prefs: []
  type: TYPE_NORMAL
  zh: 帧率。
- en: OutputStreaminfo[](#outputstreaminfo "Permalink to this heading")
  id: totrans-87
  prefs:
  - PREF_H3
  type: TYPE_NORMAL
  zh: OutputStreaminfo[](#outputstreaminfo "此标题的永久链接")
- en: struct  OutputStreamInfo[](#_CPPv4N5torio2io16OutputStreamInfoE "Permalink to
    this definition")
  id: totrans-88
  prefs: []
  type: TYPE_NORMAL
  zh: 结构  OutputStreamInfo[](#_CPPv4N5torio2io16OutputStreamInfoE "此定义的永久链接")
- en: Information about output stream configured by user code.
  id: totrans-89
  prefs: []
  type: TYPE_NORMAL
  zh: 用户代码配置的输出流信息。
- en: AUDIO-SPECIFIC MEMBERS
  id: totrans-90
  prefs: []
  type: TYPE_NORMAL
  zh: 音频特定成员
- en: double  sample_rate  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo11sample_rateE
    "Permalink to this definition")
  id: totrans-91
  prefs: []
  type: TYPE_NORMAL
  zh: double  采样率  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo11sample_rateE "此定义的永久链接")
- en: Sample rate.
  id: totrans-92
  prefs: []
  type: TYPE_NORMAL
  zh: 采样率。
- en: int  num_channels  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo12num_channelsE
    "Permalink to this definition")
  id: totrans-93
  prefs: []
  type: TYPE_NORMAL
  zh: int  通道数  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo12num_channelsE "此定义的永久链接")
- en: The number of channels.
  id: totrans-94
  prefs: []
  type: TYPE_NORMAL
  zh: 通道数。
- en: VIDEO-SPECIFIC MEMBERS
  id: totrans-95
  prefs: []
  type: TYPE_NORMAL
  zh: 视频特定成员
- en: int  width  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo5widthE "Permalink to
    this definition")
  id: totrans-96
  prefs: []
  type: TYPE_NORMAL
  zh: int  宽度  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo5widthE "此定义的永久链接")
- en: Width.
  id: totrans-97
  prefs: []
  type: TYPE_NORMAL
  zh: 宽度。
- en: int  height  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo6heightE "Permalink
    to this definition")
  id: totrans-98
  prefs: []
  type: TYPE_NORMAL
  zh: int  高度  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo6heightE "此定义的永久链接")
- en: Height.
  id: totrans-99
  prefs: []
  type: TYPE_NORMAL
  zh: 高度。
- en: AVRational  frame_rate  =  {0,  1}[](#_CPPv4N5torio2io16OutputStreamInfo10frame_rateE
    "Permalink to this definition")
  id: totrans-100
  prefs: []
  type: TYPE_NORMAL
  zh: AVRational  帧率  =  {0,  1}[](#_CPPv4N5torio2io16OutputStreamInfo10frame_rateE
    "此定义的永久链接")
- en: Frame rate.
  id: totrans-101
  prefs: []
  type: TYPE_NORMAL
  zh: 帧率。
- en: Public Members
  id: totrans-102
  prefs: []
  type: TYPE_NORMAL
  zh: 公共成员
- en: int  source_index[](#_CPPv4N5torio2io16OutputStreamInfo12source_indexE "Permalink
    to this definition")
  id: totrans-103
  prefs: []
  type: TYPE_NORMAL
  zh: int  源索引[](#_CPPv4N5torio2io16OutputStreamInfo12source_indexE "此定义的永久链接")
- en: The index of the input source stream.
  id: totrans-104
  prefs: []
  type: TYPE_NORMAL
  zh: 输入源流的索引。
- en: AVMediaType  media_type  =  AVMEDIA_TYPE_UNKNOWN[](#_CPPv4N5torio2io16OutputStreamInfo10media_typeE
    "Permalink to this definition")
  id: totrans-105
  prefs: []
  type: TYPE_NORMAL
  zh: AVMediaType  媒体类型  =  AVMEDIA_TYPE_UNKNOWN[](#_CPPv4N5torio2io16OutputStreamInfo10media_typeE
    "此定义的永久链接")
- en: The stream media type.
  id: totrans-106
  prefs: []
  type: TYPE_NORMAL
  zh: 流媒体类型。
- en: Please see refer to [the FFmpeg documentation](https://ffmpeg.org/doxygen/4.1/group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48)
    for the available values
  id: totrans-107
  prefs: []
  type: TYPE_NORMAL
  zh: 请参阅[FFmpeg文档](https://ffmpeg.org/doxygen/4.1/group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48)以获取可用值
- en: '*Todo:*'
  id: totrans-108
  prefs: []
  type: TYPE_NORMAL
  zh: '*待办事项:*'
- en: Introduce own enum and get rid of FFmpeg dependency
  id: totrans-109
  prefs: []
  type: TYPE_NORMAL
  zh: 引入自己的枚举并摆脱FFmpeg依赖
- en: int  format  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo6formatE "Permalink
    to this definition")
  id: totrans-110
  prefs: []
  type: TYPE_NORMAL
  zh: int  格式  =  -1[](#_CPPv4N5torio2io16OutputStreamInfo6formatE "此定义的永久链接")
- en: Media format. AVSampleFormat for audio or AVPixelFormat for video.
  id: totrans-111
  prefs: []
  type: TYPE_NORMAL
  zh: 媒体格式。音频的AVSampleFormat或视频的AVPixelFormat。
- en: std::string  filter_description  =  {}[](#_CPPv4N5torio2io16OutputStreamInfo18filter_descriptionE
    "Permalink to this definition")
  id: totrans-112
  prefs: []
  type: TYPE_NORMAL
  zh: std::string  滤波器描述  =  {}[](#_CPPv4N5torio2io16OutputStreamInfo18filter_descriptionE
    "此定义的永久链接")
- en: Filter graph definition, such as `"aresample=16000,aformat=sample_fmts=fltp"`.
  id: totrans-113
  prefs: []
  type: TYPE_NORMAL
  zh: 滤波器图定义，例如`"aresample=16000,aformat=sample_fmts=fltp"`。