Use below command to successfully continuously saving frame files.
gst-launch-1.0 pulsevideosrc ! vaapipostproc ! vaapiencode_h264 ! mpegtsmux ! multifilesink location = multisrc/frame%d.ts
saved files
ls -la
total 11260
drwxr-xr-x 2 dev3lx dev3lx 303104 May 15 10:28 .
drwx------ 23 dev3lx dev3lx 4096 May 15 11:35 ..
-rw-r--r-- 1 root root 21056 May 15 10:27 frame0.ts
-rw-r--r-- 1 root root 5640 May 15 10:28 frame100.ts
-rw-r--r-- 1 root root 7332 May 15 10:28 frame101.ts
-rw-r--r-- 1 root root 2632 May 15 10:28 frame102.ts
-rw-r--r-- 1 root root 4700 May 15 10:28 frame103.ts
-rw-r--r-- 1 root root 6016 May 15 10:28 frame104.ts
-rw-r--r-- 1 root root 7708 May 15 10:28 frame105.ts
-rw-r--r-- 1 root root 2820 May 15 10:28 frame106.ts
-rw-r--r-- 1 root root 4888 May 15 10:28 frame107.ts
-rw-r--r-- 1 root root 6392 May 15 10:28 frame108.ts
-rw-r--r-- 1 root root 7332 May 15 10:28 frame109.ts
-rw-r--r-- 1 root root 9964 May 15 10:27 frame10.ts
-rw-r--r-- 1 root root 3008 May 15 10:28 frame110.ts
-rw-r--r-- 1 root root 4888 May 15 10:28 frame111.ts
-rw-r--r-- 1 root root 5640 May 15 10:28 frame112.ts
-rw-r--r-- 1 root root 7708 May 15 10:28 frame113.ts
-rw-r--r-- 1 root root 2820 May 15 10:28 frame114.ts
...
But I don't know how to play the saved files. What I tried is use VLC player and select all the saved files, but it doesn't work. I also tried playing individual saved file, however majority file cannot be played. Can you advise how to play them?
gst-launch-1.0 multifilesrc location="multisrc/frame%d.ts" ! tsdemux ! h264parse ! vaapih264dec ! videoconvert ! autovideosink