http://www.mp3-box.org/sony-walkman-mp3-video-format/
What video format does Sony Walkman MP3 play?
I can’t put video’s on my Sony Walkman MP3 player because it says cannot support file. People that own Sony Walkman MP3 players, can you tell me what video format can it play. PLEASE!
You can’t put videos to your sony walkman only because sony walkman just support some special mp4 videos, like MP4(H.264/AVC video encode, AAC audio encode), if you don’t know how to convert it, you can try RZ Video Converter, it can convert any videos and audios between any different formats, such as convert videos to right sony walkman mp4 video format, etc, you can yahoo or google search and download RZ Video Converter, easy to use, hope it can help you!
Sony Walkman E340 16GB MP3 Player