mkvtoolnix/tests/test-648append_matroska_first_timestamp_not_zero.rb

#!/usr/bin/ruby -w

# T_648append_matroska_first_timestamp_not_zero
describe "mkvmerge / appending Matroska files where the second file's first timestamp is bigger than 0"
test_merge "data/mkv/bug2345-1.mkv + data/mkv/bug2345-2.mkv"
Matroska reader: don't downshift timestamps twice when appending Back in the day the Matroska reader was only trying to shift timestamps to 0 by using the first cluster's cluster timestamp. Quite a while later real zeroing was implemented by actually reading the timestamps of all blocks of the first ~20 MB of the file or so, but the original method wasn't removed. This was bad in two ways: 1. The older method was wrong as the first cluster's timestamp didn't have to be equal to the lowest timestamp in the file as block timestamps can be negative. 2. There were two methods for downshifting that were applied on top of each other when appending. This removes the old, wrong way. Fixes #2345. 2018-07-24 19:15:15 +00:00			`#!/usr/bin/ruby -w`

			`# T_648append_matroska_first_timestamp_not_zero`
			`describe "mkvmerge / appending Matroska files where the second file's first timestamp is bigger than 0"`
			`test_merge "data/mkv/bug2345-1.mkv + data/mkv/bug2345-2.mkv"`