当前该需求为：通过WIFI传输至少200MB的媒体文件（视频或图片），其中视频文件无音频数据。
有以下5个疑问点。
1.通过WIFI走FTP传输媒体文件到本地FLASH，存储在本地的媒体文件应该是什么格式？
2.该媒体文件的处理过程是怎样的，耗时如何？
3.当前考虑走SDIO（2.0）接入外部高速WIFI模块，是否可行？
4.媒体文件从wifi模组传输，由于当前系统中RAM不支持缓存整个媒体文件，所以考虑分段传输，分段写入FLASH，该操作是否会影响传输速率？
5.该方案在传输速率上大致表现可能是怎样的？传输200MB文件，可能需要多少时间呢？
The current requirement is to transfer at least 200MB of media files (video or pictures) over WIFI, where the video file has no audio data.
Here are five questions.
1. Transfer media files to the local FLASH via FTP over WIFI. What format should the media files stored in the local Flash be?
2. What is the processing process of the media file and how long does it take?
3. Is it feasible to use SDIO (2.0) to access the external high-speed WIFI module?
4. The media file is transferred from the wifi module. Since the RAM in the current system does not support caching of the entire media file, consider segmented transmission and segmented writing to FLASH.
5. What is the general performance of the solution in terms of transmission rate? How long might it take to transfer a 200MB file?
