Better dependency tracking for ffprobe FATE tests needed

[Timothy Gu]

Right now, ffprobe tests uses tests/data/ffprobe-test.nut, which depends on ffmpeg$(EXESUF). However, ffprobe tests are not disabled with ffmpeg is disabled, like when --disable-avdevice is passed. This leads to errors when testing ffprobe.

There are two variants:

​http://fate.ffmpeg.org/log.cgi?time=latest&log=test&slot=x86_64-archlinux-gcc-disable-everything:

GEN	tests/data/ffprobe-test.nut
/home/ux/fate/ffmpeg/tests/Makefile:47: recipe for target 'tests/data/ffprobe-test.nut' failed
make: *** [tests/data/ffprobe-test.nut] Error 1

​http://fate.ffmpeg.org/log.cgi?time=latest&log=test&slot=x86_64-archlinux-gcc-disableavfilter:

make: *** No rule to make target 'ffmpeg', needed by 'tests/data/ffprobe-test.nut'.

[Carl Eugen Hoyos]

FFprobe tests are disabled if ffmpeg is disabled, ffmpeg does not depend on avdevice.
The FFprobe tests depend on a file that can currently only be created if avdevice was enabled, I will attach a patch that works around this issue by not using avdevice when creating the file. Unfortunately, it slightly changes the output file because the audio stream gets a default stream (this may or may not be related to ticket #3622).
A solution would be to first change the test file so the audio stream will be set to default and then apply my patch.

[Carl Eugen Hoyos]

Fixed an error in my first comment and sent a patch to change the test file so the audio stream gets disposition default.

[mkver]

Fixed in 4845f6687d4f1ddcb1ed57b09b09f284e8500fc1 (it added a dependency on avdevice; one could do this in a more fine-grained manner, but it fixes the issue as reported).