Javascript 节点gm流上出现错误

我有以下

Buffer

对象数组，这些对象是我从

base64

编码图像字符串创建的，由

jpg

和

png

图像组成：

[ 
    <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... >,
    <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... >
]

然后将数据以

jpg

的形式传输到

res

currentGm.stream('jpg').pipe(res);

但我得到了这个错误：

events.js:141
      throw er; // Unhandled 'error' event
      ^

Error: spawn gm ENOENT
    at exports._errnoException (util.js:856:11)
    at Process.ChildProcess._handle.onexit (internal/child_process.js:178:32)
    at onErrorNT (internal/child_process.js:344:16)
    at nextTickCallbackWith2Args (node.js:478:9)
    at process._tickDomainCallback (node.js:433:17)

我试图在

流

回调上检查

err

，结果是

null

另外，

currentGm

看起来如下：

gm {
  domain: null,
  _events: {},
  _eventsCount: 0,
  _maxListeners: undefined,
  _options: {},
  data: {},
  _in: [],
  _out: [],
  _outputFormat: null,
  _subCommand: 'convert',
  sourceBuffer: <Buffer 75 ab 5a 8a 66 a0 7b f8 e9 7a 06 da b1 ee b8 ff d8 ff e0 00 10 4a 46 49 46 00 01 02 00 00 01 00 01 00 00 ff db 00 43 00 03 02 02 03 02 02 03 03 03 03 ... >,
  source: 'unknown.jpg',
  _sourceFormatters: [ [Function] ] }

Socket {
  _connecting: false,
  _hadError: false,
  _handle:
   Pipe {
     _externalStream: {},
     fd: 27,
     writeQueueSize: 0,
     owner: [Circular],
     onread: [Function: onread],
     reading: true },
  _parent: null,
  _host: null,
  _readableState:
   ReadableState {
     objectMode: false,
     highWaterMark: 16384,
     buffer: [],
     length: 0,
     pipes: null,
     pipesCount: 0,
     flowing: null,
     ended: false,
     endEmitted: false,
     reading: true,
     sync: false,
     needReadable: true,
     emittedReadable: false,
     readableListening: false,
     defaultEncoding: 'utf8',
     ranOut: false,
     awaitDrain: 0,
     readingMore: false,
     decoder: null,
     encoding: null },
  readable: true,
  domain: null,
  _events:
   { end: { [Function: g] listener: [Function: onend] },
     finish: [Function: onSocketFinish],
     _socketEnd: [Function: onSocketEnd],
     close: [Function] },
  _eventsCount: 4,
  _maxListeners: undefined,
  _writableState:
   WritableState {
     objectMode: false,
     highWaterMark: 16384,
     needDrain: false,
     ending: false,
     ended: false,
     finished: false,
     decodeStrings: false,
     defaultEncoding: 'utf8',
     length: 0,
     writing: false,
     corked: 0,
     sync: true,
     bufferProcessing: false,
     onwrite: [Function],
     writecb: null,
     writelen: 0,
     bufferedRequest: null,
     lastBufferedRequest: null,
     pendingcb: 0,
     prefinished: false,
     errorEmitted: false },
  writable: false,
  allowHalfOpen: false,
  destroyed: false,
  bytesRead: 0,
  _bytesDispatched: 0,
  _sockname: null,
  _writev: null,
  _pendingData: null,
  _pendingEncoding: '' }

---

在Mac OS X上，使用

brew安装
imagemagick
修复了该问题

brew安装imagemagick

在我的
路由器中
：

var gm=require（'gm'）。子类（{imageMagick:true}）
在Mac OS X上，使用
brew安装
imagemagick
修复了该问题

brew安装imagemagick

在我的
路由器中
：

var gm=require（'gm'）。子类（{imageMagick:true}）

Socket {
  _connecting: false,
  _hadError: false,
  _handle:
   Pipe {
     _externalStream: {},
     fd: 27,
     writeQueueSize: 0,
     owner: [Circular],
     onread: [Function: onread],
     reading: true },
  _parent: null,
  _host: null,
  _readableState:
   ReadableState {
     objectMode: false,
     highWaterMark: 16384,
     buffer: [],
     length: 0,
     pipes: null,
     pipesCount: 0,
     flowing: null,
     ended: false,
     endEmitted: false,
     reading: true,
     sync: false,
     needReadable: true,
     emittedReadable: false,
     readableListening: false,
     defaultEncoding: 'utf8',
     ranOut: false,
     awaitDrain: 0,
     readingMore: false,
     decoder: null,
     encoding: null },
  readable: true,
  domain: null,
  _events:
   { end: { [Function: g] listener: [Function: onend] },
     finish: [Function: onSocketFinish],
     _socketEnd: [Function: onSocketEnd],
     close: [Function] },
  _eventsCount: 4,
  _maxListeners: undefined,
  _writableState:
   WritableState {
     objectMode: false,
     highWaterMark: 16384,
     needDrain: false,
     ending: false,
     ended: false,
     finished: false,
     decodeStrings: false,
     defaultEncoding: 'utf8',
     length: 0,
     writing: false,
     corked: 0,
     sync: true,
     bufferProcessing: false,
     onwrite: [Function],
     writecb: null,
     writelen: 0,
     bufferedRequest: null,
     lastBufferedRequest: null,
     pendingcb: 0,
     prefinished: false,
     errorEmitted: false },
  writable: false,
  allowHalfOpen: false,
  destroyed: false,
  bytesRead: 0,
  _bytesDispatched: 0,
  _sockname: null,
  _writev: null,
  _pendingData: null,
  _pendingEncoding: '' }