* abr Average audio bitrate in KBit/s
* acodec Name of the audio codec in use
* vbr Average video bitrate in KBit/s
* vcodec Name of the video codec in use
* filesize The number of bytes, if known in advance
* player_url SWF Player URL (used for rtmpdump).
* abr Average audio bitrate in KBit/s
* acodec Name of the audio codec in use
* vbr Average video bitrate in KBit/s
* vcodec Name of the video codec in use
* filesize The number of bytes, if known in advance
* player_url SWF Player URL (used for rtmpdump).