В сообщении от Saturday 28 March 2020 00:11:13 Phyllis Smith написал(а): > Well, gg looked every where he could think of to obviously include libpng > and could find absolutely no place where the "endian"ness was stored. > Still confused here.
May be it really not stored, but ASSUMED? > > On Fri, Mar 27, 2020 at 2:24 PM Andrew Randrianasulu < > [email protected]> wrote: > > > В сообщении от Friday 27 March 2020 22:38:29 Phyllis Smith написал(а): > > > Andrew, > > > We have not given up on this yet but really do not understand the png > > > little endian issue. When gg looks through the png code it is very > > > insistent that with the meaning of png being Portable *Network* Graphics. > > > The emphasis on Network does not allow for little endian. > > > ------------------------------ > > > ./libpng.3:the Portable Network Graphics (PNG) format image files. It > > uses > > > the > > > ./libpng.3:PNG files store 16-bit pixels in network byte order > > (big-endian, > > > ./libpng.3:PNG files store 16-bit pixels in network byte order > > (big-endian, > > > ./libpng-manual.txt:PNG files store 16-bit pixels in network byte order > > > (big-endian, > > > ----------------------------- > > > Sorry for our confusion; I hope we can get this figured out but all > > > indications on our computers and in the code is only Big endian. > > > > But my machine is LE! * And libPNG doesn't do this swap by default ONLY > > for > > those newly-introduced 16 bit per color channel format, at least in my > > tests! > > > > Did you tried to look at Cin PNG output in both cases? > > (8 bpc default, 16 - when you select it) > > > > *Actually, I wish to test on qemu-system-ppc, but this take a lot of time > > - because emulated Mac is only single-core ..... and full emulation > > easily can slow down your Instructions per second 10x down! > > > > So, it will be 4x slower by being single core, and 10x at least slower > > again due to system emulation (kvm can't help here).. so, 1 hour > > will become 40! > > > > > > > > On Thu, Mar 26, 2020 at 8:46 PM Andrew Randrianasulu < > > > [email protected]> wrote: > > > > > > > Sorry for insisting on this filepng part - but it was my work, > > > > and I dislike to ship broken feature! > > > > > > > > I actually tested Cinelerra git on Ubuntu Live DVD, and > > > > _16 bit_ pngs were broken there without it. > > > > > > > > It was as simple as > > > > 1) opening the video > > > > 2) setting project to rgba-float color format. > > > > 3) trying to save png (from non-black area of timeline) > > > > and set options to "with alpha, 16 bits". > > > > > > > > By default Cin adds encoded results into resources and on new tracks - > > > > you clearly can see it will be black/broken. 8-bits PNGs are OK. > > > > > > > > Ubuntu image I used: > > > > http://mirror.yandex.ru/ubuntu-cdimage/xubuntu/releases/18.04/release/ > > > > xubuntu-18.04.4-desktop-amd64.iso > > > > < > > http://mirror.yandex.ru/ubuntu-cdimage/xubuntu/releases/18.04/release/xubuntu-18.04.4-desktop-amd64.iso > > > > > > > - 1.4 Gb > > > > > > > > Then I created 4 Gb file in tmpfs, formatted it with btrfs with > > > > compression, and booted Live image: > > > > > > > > guest@slax:/dev/shm$ wget > > > > > > http://mirror.yandex.ru/ubuntu-cdimage/xubuntu/releases/18.04/release/xubuntu-18.04.4-desktop-amd64.iso > > > > --2020-03-25 > > > > < > > http://mirror.yandex.ru/ubuntu-cdimage/xubuntu/releases/18.04/release/xubuntu-18.04.4-desktop-amd64.iso--2020-03-25 > > > > > > > 13:55:42-- > > > > > > http://mirror.yandex.ru/ubuntu-cdimage/xubuntu/releases/18.04/release/xubuntu-18.04.4-desktop-amd64.iso > > > > Распознаётся mirror.yandex.ru… 213.180.204.183, 2a02:6b8::183 > > > > Подключение к mirror.yandex.ru|213.180.204.183|:80... соединение > > > > установлено. > > > > HTTP-запрос отправлен. Ожидание ответа… 200 OK > > > > Длина: 1534459904 (1,4G) [application/octet-stream] > > > > Сохранение в: «xubuntu-18.04.4-desktop-amd64.iso» > > > > > > > > xubuntu-18.04.4-desktop-amd64.iso > > > > > > 100%[==============================================================================================================>] > > > > 1,43G 8,26MB/s за 6m 40s > > > > > > > > 2020-03-25 14:02:28 (3,66 MB/s) - «xubuntu-18.04.4-desktop-amd64.iso» > > > > сохранён [1534459904/1534459904] > > > > > > > > guest@slax:/dev/shm$ qemu-sy > > > > qemu-system-aarch64 qemu-system-i386 qemu-system-mips > > > > qemu-system-nios2 qemu-system-riscv64 > > > > qemu-system-sparc64 qemu-system-xtensaeb > > > > qemu-system-alpha qemu-system-lm32 qemu-system-mips64 > > > > qemu-system-or1k qemu-system-s390x > > qemu-system-tricore > > > > qemu-system-arm qemu-system-m68k > > qemu-system-mips64el > > > > qemu-system-ppc qemu-system-sh4 > > > > qemu-system-unicore32 > > > > qemu-system-cris qemu-system-microblaze qemu-system-mipsel > > > > qemu-system-ppc64 qemu-system-sh4eb > > qemu-system-x86_64 > > > > qemu-system-hppa qemu-system-microblazeel qemu-system-moxie > > > > qemu-system-riscv32 qemu-system-sparc > > qemu-system-xtensa > > > > guest@slax:/dev/shm$ qemu-system-x86_64 -m 2000 -display sdl,gl=on > > > > -soundhw es1370 -usb -cdrom xubuntu-18.04.4-desktop-amd64.iso > > > > qemu-system-x86_64: cannot set up guest memory 'pc.ram': Cannot > > allocate > > > > memory > > > > guest@slax:/dev/shm$ qemu-system-x86_64 -m 2000 -display sdl,gl=on > > > > -soundhw es1370 -usb -cdrom xubuntu-18.04.4-desktop-amd64.iso > > > > guest@slax:/dev/shm$ qemu-system-x86_64 -m 2000 -display sdl,gl=on > > > > -soundhw es1370 -usb -cdrom xubuntu-18.04.4-desktop-amd64.iso > > -enable-kvm > > > > -smp 3 > > > > guest@slax:/dev/shm$ qemu-system-x86_64 -m 2000 -display sdl,gl=on > > > > -soundhw es1370 -usb -cdrom xubuntu-18.04.4-desktop-amd64.iso > > -enable-kvm > > > > -smp 3 > > > > guest@slax:/dev/shm$ dd if=/dev/zero of=4Gb bs=1k count=4M > > > > 4194304+0 записей получено > > > > 4194304+0 записей отправлено > > > > 4294967296 байт (4,3 GB, 4,0 GiB) скопирован, 20,7155 s, 207 MB/s > > > > guest@slax:/dev/shm$ qemu-system-x86_64 -m 2000 -display sdl,gl=on > > > > -soundhw es1370 -usb -cdrom xubuntu-18.04.4-desktop-amd64.iso > > -enable-kvm > > > > -smp 4 -hda 4Gb > > > > WARNING: Image format was not specified for '4Gb' and probing guessed > > raw. > > > > Automatically detecting the format is dangerous for raw > > images, > > > > write operations on block 0 will be restricted. > > > > Specify the 'raw' format explicitly to remove the > > restrictions. > > > > > > > > in just a hour I had compiled Cinelerra (by copying git tree from host > > > > BEFORE launching qemu) > > > > > > > > Note, in such mem-restricted VM you want to use zram (not default in > > this > > > > ubuntu flavor): > > > > as root > > > > modprobe zram > > > > echo 1000000000 > /sys/block/zram0/disksize > > > > mkswap /dev/zram0 > > > > swapon /dev/zram0 > > > > > > > > this will create 1Gb sized compressed swap in ram > > > > > > > > I even send email from this virtual setup, but it apparently was stuck > > in > > > > moderation > > > > due to size (over 750 kb). > > > > > > > > NOW, I found something really weird! > > > > Patch as attached worked on 64-bit Ubuntu, > > > > but for my system I *must* > > > > place this call to png_set_swap(png_ptr); differently, not before > > > > png_write_info(png_ptr, info_ptr); > > > > but AFTER! I actually left both there .... > > > > > > > > Still, this is something strange, I'll try to contact libpng author > > about > > > > this..... > > > > > > > > Also, I attach my current OpenCV tweaks - trim out unneeded stuff, > > > > fixing two typos, adding -stdc++11 line for my odd system. > > > > > > > > I still use opencv-20180401.tgz > > > > > > > > I also have two lame (mp3lame) patches, but will send them separately. > > > > -- > > > > Cin mailing list > > > > [email protected] > > > > https://lists.cinelerra-gg.org/mailman/listinfo/cin > > > > > > > > > > > > > -- > > Cin mailing list > > [email protected] > > https://lists.cinelerra-gg.org/mailman/listinfo/cin > > > -- Cin mailing list [email protected] https://lists.cinelerra-gg.org/mailman/listinfo/cin
