Appendix C: Video Buffer Underrun Errors
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appendix c
Video Buffer Underrun Errors
This appendix documents known video buffer
underrun errors in Pro Tools with AVop-
tion|V10.
The Video Engine (“DIO Video Engine”) can en-
counter three different types of buffer underrun
errors.
“Video playback stopped due to a disk fifo
buffer underrun.”
Indicates a disk buffer underrun in which data
could not be read from the hard drive fast
enough to play video.
“Video playback stopped due to a software
decompression buffer underrun.”
Indicates a software decompression buffer un-
derrun in which there weren’t enough CPU cy-
cles to decompress video fast enough to main-
tain play back.
“Video playback stopped due to a hardware or
driver buffer underrun.”
Indicates a DIO buffer underrun in which the
hardware or low level software could not keep
up with the system load and needed to duplicate
frames at the video output.
