mkvtoolnix/tests/test-515aac_sampling_frequency_8000_is_not_sbr.rb

#!/usr/bin/ruby -w

# T_515aac_sampling_frequency_8000_is_not_sbr
describe "mkvmerge / AAC with 2 bytes codec-specific config, 8 KHz sampling frequency, is not SBR"
test_merge "data/mkv/bug1540-1.mkv + data/mkv/bug1540-2.mkv"
AAC: with 2 bytes codec-specific config only treat 24 KHz and 22.05 KHz as SBR Certain SBR AAC tracks only have two-bytes long codec-specific configuration data even though SBR normally requires five-bytes long data. mkvmerge contains a heuristic for such cases that treats sampling frequencies of <= 24000 Hz as another indicator for SBR. However, this breaks in cases of low sampling frequencies like 8000 Hz which are almost never SBR. This results in the wrong profile being detected preventing mkvmerge from appending such tracks to track for which the profile was detected correctly. This change limits the heuristic to the two most common sampling frequencies used for such broken SBR AAC files: 22050 Hz and 24000 Hz. Fixes #1540. 2015-12-19 12:04:49 +00:00			`#!/usr/bin/ruby -w`

			`# T_515aac_sampling_frequency_8000_is_not_sbr`
			`describe "mkvmerge / AAC with 2 bytes codec-specific config, 8 KHz sampling frequency, is not SBR"`
			`test_merge "data/mkv/bug1540-1.mkv + data/mkv/bug1540-2.mkv"`