node-fluent-ffmpeg抽帧截图服务

[cherishman2005]

fluent-ffmpeg/node-fluent-ffmpeg#352

router.get('/screenshot', function(req, res)
{
    var streamID    = req.query.stream,
        stream      = streams[streamID],
        file        = '/var/snapshot-' + streamID + '.png';

    var proc = ffmpeg('rtmp://' + stream.origin + ':1935/' + stream.app + '/' + stream.stream)
        .on('end', function(files)
        {
            res.sendfile(file);
        })
        .on('error', function(err)
        {
            res.json({
                status : 'error',
                error : err.message
            });
        })
        .outputOptions(['-f image2', '-vframes 1', '-vcodec png', '-f rawvideo', '-s 320x240', '-ss 00:00:01'])
        .output(file)
        .run();
});