As with any Javascript application, if you hold onto references to objects when they are no longer required, garbage collection is prevented and this may have a detrimental impact on performance. Once you set the targeted Node.js version and you are ready with your FFmpeg code, you are good to go on AWS Lambda. As such, there is no explicit requirement to free or delete objects. Select ffmpeg from the drop-down list under Custom layers and the Version, then choose Add. Freeing and deletingĬare has been taken to ensure that the reference-counted then garbage collected data structures of Javascript work in tandem with the allocation and free mechanisms of libav*. Adding FFmpeg layer to the Lambda function in the console: select Custom layers. Note that large binary data buffers are not included in the JSON and need to be managed separately. For example, to access a key frame around 42.5 seconds from the start of a file called GOPR9502.MP4:Ĭonst beamcoder = require ( 'beamcoder' ) const Koa = require ( 'koa' ) const app = new Koa ( ) app. View JPEGs in a browser of any key frame of media files in the current folder, e.g.MP4 media files on a camera memory card, with the following code snippet. Long running media processing operations are asynchronous, running as promises that execute native code on a separate thread from the main event loop. Work is configured with Javascript objects and jobs execute over data buffers that are shared between Javascript and C. The following example function logs the contents of the event. When the handler exits or returns a response, it becomes available to handle another event. When your function is invoked, Lambda runs the handler method. Rather than using the filesystem and controlling the FFmpeg as an external command line process, the beam coder executes functions of the FFmpeg libav* libraries directly. The Lambda function handler is the method in your function code that processes events. The purpose of this package is to facilitate access to the capabilities of FFmpeg - including media muxing, demuxing, encoding, decoding and filtering - from Node.js applications. Node.js native bindings to FFmpeg with support for asynchronous processing via streams and promises.
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