User`s guide

Publishing on Kindle: Guidelines for Publishers
"There is audio content at this location that is not currently supported for your
device. The caption for this content is displayed below."
<br/><br/><br/>
</audio>
• src tag: (Required) Identifies the embedded audio file, which must be in MP3 format.
• title tag: (Optional) Identifies the description of the audio.
• controls tag: (Required, unless you provide an image for use in starting the video playback)
Tells the Kindle application to display controls for the embedded audio.
• text content: (Required) Devices that do not support audio content display the text between the
<audio> and </audio> tags. If users view this eBook on a device that does not support audio,
they see this text instead. (Example: “There is content at this location that is not currently
supported for your device. The caption for this content is displayed below.”)
• id tag: (Optional) Must be unique to the document if it is used.
Streaming Audio 6.4
Streaming audio is not supported at this time. Use embedded audio instead.
Multimedia Directory 6.5
When adding audio and video files to an eBook, create an “audiovideo” directory for storing these files.
When referring to the audio or video file, include the directory name (Example: “audiovideo/filename”) in
the HTML.
Audio Guidelines 6.6
Amazon recommends using stereo channels in the MP3 source where possible, because Kindle supports
playing back audio in stereo. Use as high a bitrate as you need to hear the audio content appropriately;
this is a judgment call. For good results, consider bitrates between 128 kbps and 256 kbps (kilobits per
second). The maximum supported by Kindle is 320 kbps at variable bit rate.
Video Guidelines 6.7
Since audio content can be part of the video content, Amazon recommends using stereo channels in your
audio source where possible. Kindle supports playing back audio in stereo.
This is the ideal source spec:
Attribute
Setting
Dimensions
Widescreen: 704 x 396 (or any other
widescreen ratio); Fullscreen: 640 x 480
Interlacing
Progressive
Color Space
4:2:0 YUV
Video Codec
H.264 (recommended), MPEG-2
Video Mode
VBR (recommended) or CBR
Video Bit Rate
2500 kbps or higher recommended
Key Frame Interval
2 or 4 seconds recommended
Audio Codec
MP3
Audio Bit Rate
256 kbps or higher recommended
Audio Sample Rate
48 kHz (recommended), 44.1 kHz
Kindle Publishing Guidelines Amazon.com 53