Bug: Can't use CALL LENGTH parameters below the value of 12

[jesperstarkar]

Expected behaviour

Be able to use the length-parameter within a file's first 12 frames.

Current behaviour

All length-values >=12 becomes 12.

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Steps to reproduce

Wrong result:

1. LOAD 1 amb
2. CALL 1 LENGTH 5

Correct result can be achieved by a workaround:

1. LOAD 1 amb length 0
2. CALL 1 LENGTH 5

....or by

1. LOAD 1 amb length 5

The workaround suggests that explicitly setting a lower length, either on or after the LOAD, prevents the 12 first frames from being "loaded into some kind of buffer".

Environment

• 2.4 (haven't tried others)
• 1080i50000 channel (haven't tried others)

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Screenshots

If applicable, add screenshots as complementary information.

[Julusian]

Related #1073

I would guess that this is the ffmpeg producer filling the buffer before considering the length, as the buffer is fps/4 frames, which would be 12 for a 50i/p channel