src/main/java/org/jcodec/api/FrameGrab.java
public static Picture getFrameFromFile(File file, int frameNumber) throws IOException, JCodecException {
        FileChannelWrapper ch = null;
        try {
            ch = NIOUtils.readableChannel(file);
            return createFrameGrab(ch).seekToFramePrecise(frameNumber).getNativeFrame();
        } finally {
            NIOUtils.closeQuietly(ch);
        }
    }
public static Picture getFrameFromFile(File file, int frameNumber) throws IOException, JCodecException {
        FileChannelWrapper ch = null;
        try {
            ch = NIOUtils.readableChannel(file);
            return createFrameGrab(ch).seekToFramePrecise(frameNumber).getNativeFrame();
        } finally {
            NIOUtils.closeQuietly(ch);
        }
    }
Get frame at a specified frame number as JCodec image

@param file
@param second
@return
@throws IOException
@throws JCodecException