tests/fate-run: add runecho command to run a test and display its output

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
tests/fate/libavutil: run cpu test and display the cpus detected feature set

With this the fate clients runtime cpu feature set should be visible

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avfilter/vsrc_mandelbrot: use av_malloc_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/matroskaenc: use av_mallocz_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/libnut: use av_mallocz_array()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libavformat/mov: Elimitate double reading of COVR metadata if MOV_EXPORT_ALL_METADATA is enabled

Problem: ffmpeg tries to read COVR atom data twice if MOV_EXPORT_ALL_METADATA is enabled.
If COVR atom is the last in the stream, a parsing of such file fails.

Solution: just return immediatelly after mov_read_covr

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>