Andrew,
Reverse play was sped up with the use of cache (due to report of slow reverse).  We both tested but apparently not good enough.
GG will look at the dumps right now.  THANKS so much.  gg/Phyllis

On Sat, Sep 12, 2020 at 11:34 AM Andrew Randrianasulu via Cin <cin@lists.cinelerra-gg.org> wrote:
I compiled git (commit 45a8ba3455cf252332c03533a7590df5267ce9aa) and tried this version

Loaded 180p60 video, set project to RGBA-Float, set fader to some 70%
Star playback = OK
Fast playback = OK
Fast reverse playback = crash after some time (from around 2 min on timeline back to very start)

LANG=ru_RU.utf8 DRI_PRIME=1 cin
Cinelerra Infinity - built: Sep 12 2020 19:20:27
git://git.cinelerra-gg.org/goodguy/cinelerra.git
(c) 2006-2019 Heroine Virtual Ltd. by Adam Williams
2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy
Cinelerra is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. There is absolutely no warranty for Cinelerra.

RenderFarmClient::main_loop: client started
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Jean_Louis_dolphin_and_mirror.avi
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
AudioALSA::write_buffer err -32(Обрыв канала) at sample 368839
** segv at 0x884441a in pid 23242, tid 23470
writing debug data to /tmp/cinelerra_23242.dmp
lock_items: 25
lock_frees: 12
** dump complete
Ошибка сегментирования
guest@slax:/dev/shm$ less /tmp/cinelerra_23242.dmp
guest@slax:/dev/shm$ LANG=ru_RU.utf8 DRI_PRIME=1 cin
Cinelerra Infinity - built: Sep 12 2020 19:20:27
git://git.cinelerra-gg.org/goodguy/cinelerra.git
(c) 2006-2019 Heroine Virtual Ltd. by Adam Williams
2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy
Cinelerra is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. There is absolutely no warranty for Cinelerra.

RenderFarmClient::main_loop: client started
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
FFMPEG::open_decoder: some stream times estimated: /home/guest/New_hdd/Swimming with orca in New Zealand-JQ3mDXF3bcE.mkv
** segv at 0xf69ee694 in pid 23622, tid 23750
writing debug data to /tmp/cinelerra_23622.dmp
lock_items: 25
lock_frees: 11
AudioALSA::write_buffer err -32(Обрыв канала) at sample 627450
** dump complete
Ошибка сегментирования
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