Troubleshooting
203
Latent Images or Flashing During Playback
1.
Incorrect timecode or improperly closed encoding session
.
If the incorrect timecode is given for a particular file it is
possible to encode a frame or two of the trailer or header
information from the source. Often this extraneous frame is
seen only briefly and can appear as a flash on the screen.
Review the original source of the encoding and determine if
the timecode are correct or if the encoding session was actually
closed on the proper frame.
2.
Playing MPEG 1 and MPEG2 files back to back.
The resolution switch from MPEG1 files (342X240) to
MPEG2 files (720X480) causes a latent image or a quadrant
display of the last played file's image. The only way to perform
seamless playback when using a playlist is to insert an encoded
black file with blank audio track, between MPEG1 and
MPEG2 files. The black MPEG file preceding the playback
file should be of the same standard. Thus to transition from
MPEG1 to MPEG2 and back to MPEG1, the order of files is:
MPEG1
Black MPEG2 with a blank audio track
MPEG2
Black MPEG1 with a blank audio track
MPEG1
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