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E
NCODING
R
AND
In order to ensure proper playback on the Firefly, the MPEG
content must be encoded following a particular set of encoding
requirements. The Encoding Requirements, as well as the
Encoding Recommendations, listed below provide a brief set of
criteria to create MPEG files that will be compatible with the
Firefly playback system.
Encoding Requirements
1. Files must be program stream MPEG2 or system stream
MPEG1 of audio/video, or elementary stream MPEG2 or
MPEG1 of video only or audio only.
2. Use 4:2:0, not 4:2:2 encoding.
3. In MPEG-2, both audio and video fields should be encoded.
This is the normal default.
4. Audio only (Dolby Digital or MPEG Layer 2) files cannot be
mixed with files containing videos (MPEG, MPEG2 program
stream, video only).
5. Firefly – Standard IDE Hard Drive): The total bit rate of a
Firefly player must not exceed 40 mbps.
6. The presentation time stamp (PTS) values contained in the
audio and video streams in a file must be continuous and
increasing. In particular, the PTS values should not reset to 0 at
any point in the file. The time between the first and last time
stamps in a file should reflect the actual duration of the file.
7. Files should be no less than 4 megabytes in size. If some of
your files are smaller than 4 megabytes, use an editor to
combine the files to create a single file at least 4 megabytes in
size.
8. Files should be no larger than 2 gigabytes in size.
R
ECOMMENDATIONS
EQUIREMENTS
19
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