Cryptic error message when running without first downloading test vectors #232
Description
If fluster is run without first downloading the test vectors, a cryptic error message is thrown.
For example, running with the command:
$ fluster run -d GStreamer-VP9-V4L2SL-Gst1.0
returns:
[VP9-TEST-VECTORS] (GStreamer-VP9-V4L2SL-Gst1.0) vp90-2-02-size-66x32.webm ... Error
and:
=======================================================================
FAIL: vp90-2-02-size-66x32.webm (GStreamer-VP9-V4L2SL-Gst1.0.VP9-TEST-VECTORS.vp90-2-02-size-66x32.webm)
----------------------------------------------------------------------
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/fluster/test.py", line 80, in _test
result = self.decoder.decode(
^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/fluster/decoders/gstreamer.py", line 163, in decode
data = run_pipe_command_with_std_output(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3/dist-packages/fluster/utils.py", line 105, in run_pipe_command_with_std_output
raise ex
File "/usr/lib/python3/dist-packages/fluster/utils.py", line 84, in run_pipe_command_with_std_output
data = subprocess.check_output(
^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/subprocess.py", line 466, in check_output
return run(*popenargs, stdout=PIPE, timeout=timeout, check=True,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/lib/python3.12/subprocess.py", line 571, in run
raise CalledProcessError(retcode, process.args,
subprocess.CalledProcessError: Command 'gst-launch-1.0 --no-fault filesrc location=/root/.local/share/fluster/resources/VP9-TEST-VECTORS/vp90-2-02-size-66x32.webm/vp90-2-02-size-66x32.webm ! parsebin !
v4l2slvp9dec ! video/x-raw ! videoconvert dither=none ! video/x-raw,format=I420 ! videocodectestsink -m' returned non-zero exit status 255.
for every test case.
Fluster should detect that the test vector files have not been downloaded and provide a more straightforward error message in that case, like "Non-existent VP9-TEST-VECTORS test vectors, please run fluster download VP9-TEST-VECTORS them first".