GStreamer težava na RPi?

Na Raspberry Pi 3, posodobljen, z Raspbian Jessie in kamero zajamem nekaj timelapse slik:

raspistill -o timelapse-%04d.jpg -t 10000 -tl 1000

Program ustvari slike od timelapse-0001.jpg do timelapse-0011.jpg. Slike so OK. No, tukaj se mi pojavi prvo vprašanje, in sicer zakaj se imena slik ne začnejo od timelapse-0000.jpg dalje... in t tudi, če raspistill-u dodam parameter "-fs 0". Ampak OK.

Problem nastane, ko hočem slike zložiti v video:

gst-launch-1.0 multifilesrc location=timelapse-%04d.jpg index=1 caps="image/jpeg,framerate=24/1" ! jpegdec ! omxh264enc ! avimux ! filesink location=timelapse.avi

Dobim namreč napako:

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
ERROR: from element /GstPipeline:pipeline0/GstMultiFileSrc:multifilesrc0: Error while reading from file "timelapse-0000.jpg".
Additional debug info:
gstmultifilesrc.c(467): gst_multi_file_src_create (): /GstPipeline:pipeline0/GstMultiFileSrc:multifilesrc0:
Failed to open file 'timelapse-0000.jpg': No such file or directory
ERROR: pipeline doesn't want to preroll.
Setting pipeline to NULL ...
Freeing pipeline ...

OK, torej timelapse-0011.jpg preimenujem v timelapse-0000.jpg in zadevo še enkrat poženem:

gst-launch-1.0 multifilesrc location=timelapse-%04d.jpg index=1 caps="image/jpeg,framerate=24/1" ! jpegdec ! omxh264enc ! avimux ! filesink location=timelapse.avi

Tokrat dobim pa tole:

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...

Zadeva se ustavi in jo moram ročno ubiti.