Kdenlive - gap between clips in rendered video

kris444 · June 9, 2025, 4:21pm

I use Wondershare Filmora on win11 for occasional vlogging for youtube.
I am trying to fully set up on Mint Cinn 22.1
I got kdenlive acceleration to work - that is, a 2:55 (M:ss) video of 4 clips rendered 4K 59fps in 1:43 so I can live with that. The quality of the video was good but at every point where it transitioned from one clip to the next there was an obvious pause/break/divot in the video - what is that and how do I get rid of that? Oh, that last test I tried using the Appimage but it did nothing when click on it. Please let me know if you need any doc.

I do tests by: take image, test, restore image - so each test is relatively clean. I do not test on a system where this or other video editors have been installed.

my system

System:
  Kernel: 6.11.0-26-generic arch: x86_64 bits: 64 compiler: gcc v: 13.3.0 clocksource: tsc
  Desktop: Cinnamon v: 6.4.8 tk: GTK v: 3.24.41 wm: Muffin v: 6.4.1 vt: 7 dm: LightDM v: 1.30.0
    Distro: Linux Mint 22.1 Xia base: Ubuntu 24.04 noble
Machine:
  Type: Desktop System: ASUS product: N/A v: N/A serial: <superuser required>
  Mobo: ASUSTeK model: ROG STRIX Z790-E GAMING WIFI v: Rev 1.xx serial: <superuser required>
    part-nu: SKU uuid: <superuser required> UEFI: American Megatrends v: 3001 date: 03/07/2025
CPU:
  Info: 24-core (8-mt/16-st) model: 13th Gen Intel Core i9-13900K bits: 64 type: MST AMCP
    smt: enabled arch: Raptor Lake rev: 1 cache: L1: 2.1 MiB L2: 32 MiB L3: 36 MiB
  Speed (MHz): avg: 1420 high: 5800 min/max: 800/5500:5800:4300 cores: 1: 800 2: 800 3: 1711
    4: 800 5: 800 6: 800 7: 800 8: 5800 9: 4307 10: 800 11: 3821 12: 800 13: 3314 14: 800 15: 800
    16: 800 17: 3534 18: 800 19: 2962 20: 800 21: 800 22: 800 23: 800 24: 800 25: 800 26: 800
    27: 800 28: 800 29: 800 30: 800 31: 800 32: 800 bogomips: 191692
  Flags: avx avx2 ht lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx
Graphics:
  Device-1: NVIDIA GA104 [GeForce RTX 3060 Ti Lite Hash Rate] vendor: Gigabyte driver: nvidia
    v: 570.133.07 arch: Ampere pcie: speed: 2.5 GT/s lanes: 16 ports: active: none off: DP-1
    empty: DP-2,HDMI-A-1,HDMI-A-2 bus-ID: 01:00.0 chip-ID: 10de:2489 class-ID: 0300
  Device-2: Logitech Webcam C270 driver: snd-usb-audio,uvcvideo type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 bus-ID: 1-5.1.4:16 chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Display: x11 server: X.Org v: 21.1.11 with: Xwayland v: 23.2.6 driver: X: loaded: nvidia
    unloaded: fbdev,modesetting,nouveau,vesa gpu: nvidia,nvidia-nvswitch display-ID: :0 screens: 1
  Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 508x286mm (20.00x11.26") s-diag: 583mm (22.95")
  Monitor-1: DP-1 mapped: DP-0 note: disabled model: Dell S3221QS serial: <filter> res: 1920x1080
    hz: 60 dpi: 70 size: 697x392mm (27.44x15.43") diag: 806mm (31.7") modes: max: 3840x2160
    min: 640x480
  API: EGL v: 1.5 hw: drv: nvidia platforms: device: 0 drv: nvidia device: 2 drv: swrast gbm:
    drv: nvidia surfaceless: drv: nvidia x11: drv: nvidia inactive: wayland,device-1
  API: OpenGL v: 4.6.0 compat-v: 4.5 vendor: nvidia mesa v: 570.133.07 glx-v: 1.4
    direct-render: yes renderer: NVIDIA GeForce RTX 3060 Ti/PCIe/SSE2
Audio:
  Device-1: Intel Raptor Lake High Definition Audio vendor: ASUSTeK driver: snd_hda_intel v: kernel
    bus-ID: 00:1f.3 chip-ID: 8086:7a50 class-ID: 0403
  Device-2: NVIDIA GA104 High Definition Audio vendor: Gigabyte driver: snd_hda_intel v: kernel
    pcie: speed: 16 GT/s lanes: 16 bus-ID: 01:00.1 chip-ID: 10de:228b class-ID: 0403
  Device-3: ASUSTek USB Audio driver: hid-generic,snd-usb-audio,usbhid type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 bus-ID: 1-4:5 chip-ID: 0b05:1a52 class-ID: 0300
  Device-4: Logitech Webcam C270 driver: snd-usb-audio,uvcvideo type: USB rev: 2.0
    speed: 480 Mb/s lanes: 1 bus-ID: 1-5.1.4:16 chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Device-5: Arturia KeyLab Essential 61 driver: snd-usb-audio type: USB rev: 2.0 speed: 12 Mb/s
    lanes: 1 bus-ID: 1-8:9 chip-ID: 1c75:028a class-ID: 0103 serial: <filter>
  API: ALSA v: k6.11.0-26-generic status: kernel-api
  Server-1: PipeWire v: 1.0.5 status: active with: 1: pipewire-pulse status: active
    2: wireplumber status: active 3: pipewire-alsa type: plugin
Network:
  Device-1: Intel Wi-Fi 6E AX210/AX1675 2x2 [Typhoon Peak] driver: iwlwifi v: kernel pcie:
    speed: 5 GT/s lanes: 1 bus-ID: 06:00.0 chip-ID: 8086:2725 class-ID: 0280
  IF: wlo1 state: down mac: <filter>
  Device-2: Intel Ethernet I226-V vendor: ASUSTeK driver: igc v: kernel pcie: speed: 5 GT/s
    lanes: 1 port: N/A bus-ID: 07:00.0 chip-ID: 8086:125c class-ID: 0200
  IF: eno2 state: up speed: 1000 Mbps duplex: full mac: <filter>
Bluetooth:
  Device-1: Intel AX210 Bluetooth driver: btusb v: 0.8 type: USB rev: 2.0 speed: 12 Mb/s lanes: 1
    bus-ID: 1-14:15 chip-ID: 8087:0032 class-ID: e001
  Report: hciconfig ID: hci0 rfk-id: 0 state: up address: <filter> bt-v: 5.3 lmp-v: 12
    sub-v: 363c hci-v: 12 rev: 363c class-ID: 7c0104
RAID:
  Hardware-1: Intel Volume Management Device NVMe RAID Controller Intel driver: vmd v: 0.6
    port: N/A bus-ID: 00:0e.0 chip-ID: 8086:a77f rev: class-ID: 0104
Drives:
  Local Storage: total: 2.73 TiB used: 1.27 TiB (46.4%)
  ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 990 PRO 1TB size: 931.51 GiB speed: 63.2 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: 4B2QJXD7 temp: 38.9 C scheme: GPT
  ID-2: /dev/nvme1n1 vendor: Samsung model: SSD 980 PRO 1TB size: 931.51 GiB speed: 63.2 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: 5B2QGXA7 temp: 41.9 C scheme: GPT
  ID-3: /dev/nvme2n1 vendor: Western Digital model: WD Blue SN570 1TB size: 931.51 GiB
    speed: 31.6 Gb/s lanes: 4 tech: SSD serial: <filter> fw-rev: 234110WD temp: 36.9 C scheme: GPT
Partition:
  ID-1: / size: 95.06 GiB used: 26.7 GiB (28.1%) fs: ext4 dev: /dev/nvme1n1p6
  ID-2: /boot/efi size: 96 MiB used: 36.7 MiB (38.3%) fs: vfat dev: /dev/nvme1n1p1
Swap:
  ID-1: swap-1 type: file size: 2 GiB used: 0 KiB (0.0%) priority: -2 file: /swapfile
USB:
  Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 16 rev: 2.0 speed: 480 Mb/s lanes: 1
    chip-ID: 1d6b:0002 class-ID: 0900
  Hub-2: 1-1:2 info: ASMedia ASM1074 High-Speed hub ports: 4 rev: 2.1 speed: 480 Mb/s lanes: 1
    power: 100mA chip-ID: 174c:2074 class-ID: 0900
  Device-1: 1-1.1:4 info: MosArt Wireless Mouse type: mouse driver: hid-generic,usbhid
    interfaces: 1 rev: 1.1 speed: 12 Mb/s lanes: 1 power: 100mA chip-ID: 062a:4102 class-ID: 0301
  Hub-3: 1-2:3 info: Realtek 4-Port USB 2.0 Hub ports: 4 rev: 2.1 speed: 480 Mb/s lanes: 1
    chip-ID: 0bda:5420 class-ID: 0900
  Device-1: 1-2.1:6 info: Cyber Power System CP1500 AVR UPS type: HID driver: hid-generic,usbhid
    interfaces: 1 rev: 1.1 speed: 1.5 Mb/s lanes: 1 power: 50mA chip-ID: 0764:0501 class-ID: 0300
  Device-2: 1-2.2:7 info: Seiko Epson Perfection V39II type: <vendor specific> driver: N/A
    interfaces: 1 rev: 2.0 speed: 480 Mb/s lanes: 1 power: 500mA chip-ID: 04b8:013f class-ID: ff00
    serial: <filter>
  Device-3: 1-4:5 info: ASUSTek USB Audio type: audio,HID
    driver: hid-generic,snd-usb-audio,usbhid interfaces: 8 rev: 2.0 speed: 480 Mb/s lanes: 1
    power: 100mA chip-ID: 0b05:1a52 class-ID: 0300
  Hub-4: 1-5:8 info: ASMedia ASM1074 High-Speed hub ports: 4 rev: 2.1 speed: 480 Mb/s lanes: 1
    power: 100mA chip-ID: 174c:2074 class-ID: 0900
  Hub-5: 1-5.1:10 info: VIA Labs USB2.0 Hub ports: 4 rev: 2.1 speed: 480 Mb/s lanes: 1
    chip-ID: 2109:2817 class-ID: 0900
  Device-1: 1-5.1.3:14 info: Corsair K55 CORE RGB Gaming Keyboard type: keyboard,HID
    driver: hid-generic,usbhid interfaces: 3 rev: 1.1 speed: 12 Mb/s lanes: 1 power: 500mA
    chip-ID: 1b1c:1bfe class-ID: 0300 serial: <filter>
  Device-2: 1-5.1.4:16 info: Logitech Webcam C270 type: video,audio
    driver: snd-usb-audio,uvcvideo interfaces: 4 rev: 2.0 speed: 480 Mb/s lanes: 1 power: 500mA
    chip-ID: 046d:0825 class-ID: 0102 serial: <filter>
  Hub-6: 1-5.3:12 info: VIA Labs USB2.0 Hub ports: 4 rev: 2.1 speed: 480 Mb/s lanes: 1
    chip-ID: 2109:2817 class-ID: 0900
  Device-1: 1-8:9 info: Arturia KeyLab Essential 61 type: audio driver: snd-usb-audio
    interfaces: 2 rev: 2.0 speed: 12 Mb/s lanes: 1 power: 100mA chip-ID: 1c75:028a class-ID: 0103
    serial: <filter>
  Hub-7: 1-10:11 info: Genesys Logic Hub ports: 2 rev: 2.0 speed: 480 Mb/s lanes: 1 power: 100mA
    chip-ID: 05e3:0608 class-ID: 0900
  Device-1: 1-13:13 info: ASUSTek AURA LED Controller type: HID driver: hid-generic,usbhid
    interfaces: 2 rev: 2.0 speed: 12 Mb/s lanes: 1 power: 16mA chip-ID: 0b05:19af class-ID: 0300
    serial: <filter>
  Device-2: 1-14:15 info: Intel AX210 Bluetooth type: bluetooth driver: btusb interfaces: 2
    rev: 2.0 speed: 12 Mb/s lanes: 1 power: 100mA chip-ID: 8087:0032 class-ID: e001
  Hub-8: 2-0:1 info: super-speed hub ports: 8 rev: 3.1 speed: 20 Gb/s lanes: 2 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-9: 2-1:2 info: ASMedia ASM1074 SuperSpeed hub ports: 4 rev: 3.0 speed: 5 Gb/s lanes: 1
    power: 8mA chip-ID: 174c:3074 class-ID: 0900
  Hub-10: 2-2:3 info: Realtek 4-Port USB 3.0 Hub ports: 4 rev: 3.2 speed: 10 Gb/s lanes: 1
    chip-ID: 0bda:0420 class-ID: 0900
  Hub-11: 2-4:4 info: ASMedia ASM1074 SuperSpeed hub ports: 4 rev: 3.0 speed: 5 Gb/s lanes: 1
    power: 8mA chip-ID: 174c:3074 class-ID: 0900
  Hub-12: 2-4.1:5 info: VIA Labs USB3.0 Hub ports: 4 rev: 3.2 speed: 5 Gb/s lanes: 1
    chip-ID: 2109:0817 class-ID: 0900
  Hub-13: 2-4.3:6 info: VIA Labs USB3.0 Hub ports: 4 rev: 3.2 speed: 5 Gb/s lanes: 1
    chip-ID: 2109:0817 class-ID: 0900
Sensors:
  System Temperatures: cpu: 32.2 C mobo: N/A gpu: nvidia temp: 43 C
  Fan Speeds (rpm): N/A gpu: nvidia fan: 0%
Repos:
  Packages: pm: dpkg pkgs: 2361
  No active apt repos in: /etc/apt/sources.list
  Active apt repos in: /etc/apt/sources.list.d/official-package-repositories.list
    1: deb http: //packages.linuxmint.com xia main upstream import backport
    2: deb http: //archive.ubuntu.com/ubuntu noble main restricted universe multiverse
    3: deb http: //archive.ubuntu.com/ubuntu noble-updates main restricted universe multiverse
    4: deb http: //archive.ubuntu.com/ubuntu noble-backports main restricted universe multiverse
    5: deb http: //security.ubuntu.com/ubuntu/ noble-security main restricted universe multiverse
Info:
  Memory: total: 32 GiB note: est. available: 31.06 GiB used: 7.93 GiB (25.5%)
  Processes: 551 Power: uptime: 1h 7m states: freeze,mem,disk suspend: deep wakeups: 0
    hibernate: platform Init: systemd v: 255 target: graphical (5) default: graphical
  Compilers: gcc: 13.3.0 Client: Unknown python3.12 client inxi: 3.3.34

Ron · June 10, 2025, 5:43pm

What kdenlive build are you using then?

I’d start with “can you reproduce this with one of the supported (by us) builds, using the default rendering options”. And if/when you can’t, then start looking at either your rendering options (hardware rendering often trades quality for speed), or where you got the kdenlive package from.

If you can, we’re going to need more details about exactly how to reproduce it.

berndmj · June 10, 2025, 5:51pm

How did you do that? Compiled it yourself? I’m asking because movit has been disabled for Kdenlive for quite some time already, and the only HW acceleration available is only for the encoding part via NVENC rendering profiles.

Rendering speed is very much dependent on the types and number of effects and the kind of compositions/transitions used in your project. 02:55 minutes of 4K sources @ 59 fps rendering for 1:43 minutes indicates that there are no or only a few simple effects. But most of the time less is more

at every point where it transitioned from one clip to the next there was an obvious pause/break/divot in the video

Was that in the final render or during preview in the project monitor?

kris444 · June 10, 2025, 6:03pm

from the start of the last .kdenlive but I think that was for 4 thread test that didn’t gain anything.

<?xml version='1.0' encoding='utf-8'?>
<mlt LC_NUMERIC="C" producer="main_bin" version="7.22.0" root="/mnt/087F1E7D3F8B444A/aKdenlive/20">
 <profile frame_rate_num="60000" sample_aspect_num="1" display_aspect_den="9" colorspace="709" progressive="1" description="4K UHD 2160p 59.94 fps" display_aspect_num="16" frame_rate_den="1001" width="3840" height="2160" sample_aspect_den="1"/>
 <producer id="producer0" in="00:00:00.000" out="00:11:15.499">
  <property name="length">2147483647</property>
  <property name="eof">continue</property>
  <property name="resource">black</property>
  <property name="aspect_ratio">1</property>
  <property name="mlt_service">color</property>
  <property name="kdenlive:playlistid">black_track</property>
  <property name="mlt_image_format">rgba</property>
  <property name="set.test_audio">0</property>

As to details I forget as I am testing so many so let me know what you need and I’ll do one. It’s easy.

kris444 · June 10, 2025, 6:06pm

Anything I did I just selected settings/switches If you need to know what, ask and I will run a test and screenshot if possible.
I do not compile. I’m a windows person trying to convert to Mint.

Final render output of course. I pay little attention to the roughness of preview.
Thanks all!!!

berndmj · June 10, 2025, 6:24pm

Screenshots of the timeline, effect stack, and transitions would help. Also what render preset and project profile you used.

Posting of the .kdenlive project file contents doesn’t help if cut off after 12 rows. If you can share the sources, post the project file and the sources on a cloud share so ppl can download and test it locally.

kris444 · June 10, 2025, 8:23pm

I’ve been playing for a bit, see the gap at end, finally found “transitions” in settings/configure kdenlive set to 3 secs, changed that to 0 and will now start test. Is transitions defined anywhere else? Back in a few min. THANKS!!!

kris444 · June 10, 2025, 8:32pm

I still see the gap at the end of each clip. I have used no effects and see no effect stack.

kris444 · June 10, 2025, 8:33pm

new users can only put 1 media item per post

kris444 · June 10, 2025, 8:40pm

“transitions” - I have never knowingly used anything. how do I get NO TRANSITION? no fade, blending , or whatever some consider artistic.

berndmj · June 10, 2025, 8:40pm

Not sure this will help with the pause/break/divot because if you don’t have transitions but just hard cuts. Even if you used transitions (a default of 0 essentially is a hard cut) there shouldn’t be a pause/break/divot.

berndmj · June 10, 2025, 8:49pm

By not putting one in between tracks or between clips in the same track

kris444 · June 10, 2025, 8:52pm

I am not adding a transition. I don’t know anything about transitions. It it automatically adding something?

kris444 · June 10, 2025, 8:55pm

I changed Composition from default Disolve to Cairo Blend and now I get 1 sec of just silence, no divot. But how do I eliminate that entirely? Thanks!

berndmj · June 10, 2025, 8:57pm

No, it’s not. That’s why I am puzzled by your saying there is a pause/break/divot between clips in the final render. I mean, the audio waveform shows a short period of (relative) silence but I am sure you meant a pause/break/divot in the flow of the video/images.

berndmj · June 10, 2025, 9:00pm

What do you mean exactly? What is the divot? Is there silence or a pause in the playback of the video, i.e. a freeze?

As I pointed out before, the waveforms of the clips show some silence at the end of the clips. Is that causing the silence you are referring to?

kris444 · June 10, 2025, 9:19pm

divot would be the compressed sound plip.
I checked Wondershare and there is no gap at the end of the clips - I do not know where kdenlive is getting that or how to get rid of it.

kris444 · June 10, 2025, 9:28pm

the video freezes for 1/2-3/4 sec.

berndmj · June 10, 2025, 11:36pm

Can you share the rendered video?

Ron · June 11, 2025, 3:01am

Between the white frame seen in the video thumbnail for the last frame of your clip, and the audio silence shown in the waveform for it - I am inclined to bet that kdenlive is just rendering exactly the ‘garbage’ you have fed it and the issue is in your source clip. Maybe something like the container duration being longer than the content streams in it, maybe corrupt in some other way by whatever you created it with or modified it with since then.

I can’t speak for what wondershare might be doing to hide this from you (I could make some guesses, but they are irrelevant to the actual problem you have) - but the whole point of editing is to cut that kind of unwanted junk out of your source material, so if you don’t do that, you’re just getting exactly what you created.

So if you want people here to help you, you need to slow down and take a deep breath, read the questions that people are asking, and actually answer them. If you just keep frantically stabbing at things and posting a running commentary of random things you tried that didn’t work, all we can do is sit back and keep the popcorn bowl nice and full.

You still haven’t answered what build of kdenlive you are using. That may be contributing to this.
You need to share (at least) one of your problem source clips, if you can’t sanity check them yourself.
You need to spend some time reading at least the introductory chapters of Kdenlive Manual — Kdenlive Manual 25.08 documentation

It’s ok to be a beginner, but if you don’t understand anything we’re asking about, or even the basics of how the tool works, then I’m going to need a lot more popcorn to watch the rest of this show…