Known Problems

There are some known problems with jFlvTool and newer flv formats (i.e. h.264, AAC).

Details

jFlvTool still works fine on older formats (e.g. those created with ffmpeg) but files created with modern Adobe tools will not likely work with jFlvTool.

Working example:

• download the latest version of jFlvTool4
• download this file: http://www.stockshots.com/images/videoclips/cartoon.avi
• then convert it to flv: ffmpeg -i cartoon.avi -ar 22050 -ab 32 -f flv -s 320x240 video.flv
• then embed the metadata: java -jar jFlvTool.jar -srcfile video.flv
• then check the metadata: java -jar jFlvTool.jar -print -srcfile out_video.flv

Unfortunately we don't actively develop jFlvTool any longer since modern versions of Adobe products include metadata tools (specifically for the f4v format). We would recommend upgrading to newer Adobe tools if possible or encoding your videos using ffmpeg or similar (there will be some sacrifice in terms of bitrate / quality here, but at least it is free).

If you are able to upgrade and you're in need of a high performance streaming server we highly recommend this: http://h264.code-shop.com/trac/wiki/Mod-H264-Streaming-Lighttpd-Version2