Abort transcoding if output size exceeds 30x input size

[stronk-dev]

This PR:

• Aborts processing if the output file exceeds 30x input file size.
• Test that confirms whether one of the problematic input segments no longer triggers infinite outputs.

Note that the test probably no longer works. Will fix.

[j0sh]

Would it be cleaner to count output frames instead of output bytes?

[stronk-dev]

Would it be cleaner to count output frames instead of output bytes?

agreed.

some potential area's we could use to detect 'error states' (based off of logs from the error state from the test segment):

• the amount of decoded frames remains static, while encoded frames kept increasing. Now I can imagine that timejumps just happen from time to time where some degree of duplication is desired, but we can think of some rules here to trigger an exit.
• The original input PTS remained constant. So a solution here could be to track the previous source PTS and count 'duplicate frames' in the filter. Maybe error if there's a second worth of duplicate frames?

[stronk-dev]

Close in favour of #439