- /* We can't let this build up too much or we will run out of memory. We need to allow
- the most frames that can exist between blocks of sound in a multiplexed file.
+ /* We can't let this build up too much or we will run out of memory. There is a
+ `best' value for the allowed size of _decoded_video which balances memory use
+ with decoding efficiency (lack of seeks). Throwing away video frames here
+ is not a problem for correctness, so do it.