Signed-off-by: Martin Storsjö <martin@martin.st>

This reverts commit ce378f0d.

Use a noise range of -0.707 to 0.707 instead of -0.5 to 0.5
Signed-off-by: Justin Ruggles <justin.ruggles@gmail.com>

Signed-off-by: Martin Storsjö <martin@martin.st>

Signed-off-by: Martin Storsjö <martin@martin.st>

Also rename the test to reflect that the video track is Theora, not VP3.

Snow is a toy codec with no real-world use and horrible code.

Each fate-seek test depends now only on the corresponding fate-acodec,
fate-vsynth2 or fate-lavf test which creates the file seek-tests
operates on. The tests and references are renamed to match the test they
depend on.

Now that libavutil can be disabled, this should be conditional.

This will distinguish ALAC 16-bit tests from ALAC tests with other bit
depths.

This will distinguish FLAC 16-bit tests from FLAC tests with other bit
depths.