Segmentation fault when save output to file

[hptsf]

hello,

i have run this with ffmpeg:
./ffmpeg -hwaccel drm -i 4K-Chimei-inn-60mbps.mp4 -f null -
and all is ok, the result of fps is:
frame= 1259 fps=113 q=-0.0 Lsize=N/A time=00:00:42.04 bitrate=N/A speed=3.78x

but when i want to save data to output file with command:
./ffmpeg -hwaccel drm -i 4K-Chimei-inn-60mbps.mp4 -f null - out_vpu.mp4
This time it failed and found “Segmentation fault (core dumped)“

Is this what is the reason？