Hi Jean,
Thank you very much for your polite and
informative email.
Both are fine qualities.
For what it's worth, I
installed debian's libsdl2 package with
debugging symbols,
root$ aptitude install libsdl2-2.0-0-dbgsym
re-ran the small test case under valgrind
$ valgrind --track-origins=yes --leak-check=full
--freelist-vol=100000000 --log-file=/tmp/valgrind_with_sdl_dbg.log -v kdenlive
tmp/bug.2.kdenlive
counted how many times the key word "frame" occurs in valgrind's log, and
found over a hundred.
Here's an example:
67,108,864 bytes in 1 blocks are possibly lost in loss record 51,223 of
51,223
at 0x48317F4: memalign (vg_replace_malloc.c:858)
by 0x4B8FD11: pool_fetch (mlt_pool.c:137)
by 0x4B8FD11: mlt_pool_alloc (mlt_pool.c:292)
by 0x18F91A44: producer_get_image (producer_pixbuf.c:718)
by 0x4B76707: mlt_frame_get_image (mlt_frame.c:620)
by 0x27A3DDE4: filter_get_image (filter_deinterlace.c:307)
by 0x4B76707: mlt_frame_get_image (mlt_frame.c:620)
by 0x1825D934: get_image (filter_fieldorder.c:33)
by 0x4B76707: mlt_frame_get_image (mlt_frame.c:620)
by 0x1825C1A5: filter_get_image (filter_crop.c:76)
by 0x4B76707: mlt_frame_get_image (mlt_frame.c:620)
by 0x18261ED7: filter_get_image (filter_rescale.c:221)
by 0x4B76707: mlt_frame_get_image (mlt_frame.c:620)
Maybe it's just a coincidence.
I dunno.
I look forward to your next update.
Thanks,
Kingsley
> Sorry for the late feedback. So I made a few tests and found some
> interesting facts.
> The problem seems related to frame buffer.
>
> When setting the "buffer" property to 0 on the consumer (sdl2_audio) in
> Kdenlive, the memory usage stays stable (around 500Mb).
>
> When setting the buffer to 25 (default in Kdenlive), I get 2 different
> situations:
> - When using an HD 25fps profile, memory usage goes to about 700Mb
> - When using a SD NTSC profile, memory usage quickly goes up to 2.3Gb.
>
> These tests were done with the image attached in the latest email (3800x2500
> jpeg).
> I will try to make more tests but wondering if the frame caching bugs when
> using profile with a non integer fps profile..
>
> Regards
> jb
>
>
> > So,
> > Kingsley
> >
>
--
Time is the fire in which we all burn.
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