Dear Community,
I would like to share with you same odd results which I’ve got with Shotcut version 25.08.16.
i was a bit frustrated by getting slow export speeds; an 8 minute podcast would take 26 minutes or more to export.
Project: 3 video tracks; one 4K and the other 2 Full HD with Size, Position & Rotate and Color grading filters and 2 audio wav tracks with Audio Gain filters.
Hardware:System:
Kernel: 6.8.0-85-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
Desktop: Xfce v: 4.18.1 tk: Gtk v: 3.24.41 wm: xfwm4 v: 4.18.0 with: xfce4-panel
tools: light-locker vt: 7 dm: LightDM v: 1.30.0 Distro: Linux Mint 22 Wilma
base: Ubuntu 24.04 noble
Machine:
Type: Desktop Mobo: ASRock model: H510M-ITX/ac serial:
uuid: UEFI: American Megatrends LLC. v: P2.00 date: 10/05/2021
CPU:
Info: 6-core model: 11th Gen Intel Core i5-11400F bits: 64 type: MT MCP smt: enabled
arch: Rocket Lake rev: 1 cache: L1: 480 KiB L2: 3 MiB L3: 12 MiB
Speed (MHz): avg: 3000 min/max: 800/4400 cores: 1: 3000 2: 3000 3: 3000 4: 3000 5: 3000 6: 3000
7: 3000 8: 3000 9: 3000 10: 3000 11: 3000 12: 3000 bogomips: 62208
Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
Device-1: AMD Cape Verde XT [Radeon HD 7770/8760 / R7 250X] vendor: XFX Pine driver: radeon
v: kernel arch: GCN-1 pcie: speed: 8 GT/s lanes: 16 ports: active: DVI-I-1,DVI-I-2
empty: DP-1,HDMI-A-1 bus-ID: 01:00.0 chip-ID: 1002:683d class-ID: 0300 temp: 33.0 C
Test results:
ORIGINAL - 220 MB - 26:09
TEST-NO_AUDIO - 26:53
TEST-NO-RESIZE - 05:53 - WOW!
TEST-NO_COLOUR_GRADING - 25:43
4K-2-HD-1ST-TRACK (HD-NO_FILTERS) - 2:21 - Only 4K track was exported
1ST-TRACK (HD-WITH_FILTERS)- 10:43 - Only 4K track was exported
TEST-WITH-4K-2-HD-1ST-TRACK-NO_FILTERS - 7:34 -4K track replaced with HD
TEST-WITH-4K-2-HD-1ST-TRACK-WITH_FILTERS (ALL HD TRACKS) - 09:04 - 4K track replaced with HD - BEST_CONTRAST_AND COLOURS!
TEST-WITH-1ST-TRACK-NO FILTERS (ALL HD TRACKS) - 07:40
ORIGINAL WITH VAAPI - 10:03 - 186.2 MB -WOW!
So, if I export the 4K footage using the HP profile without filters - 2:21 and then adding it to the project and exporting it with the filters - 9:04 - I will get the fastest CPU only project export performance.
Using the old AMD based GPU surpasses even that “tweak”.
Playing both CPU and VAAPI videos side by side on HD screens, I cannot see any difference… There is some loss due to smaller file size but I couldn’t tell the difference…
