KDENLive can no longer view/display H264 clips in its monitor

Benedict_White · 2026-01-13 20:44:44

KdenLive has been working well then after some updates stopped working.

What it is currently doing is showing all the clips and showing their thumbnails at the beginning and end of the clips.

When you play a clip you do get the audio but no video.

Has anyone else got this issue?

Any suggestions please?

Benedict_White · 2026-01-18 00:43:01

Thought I would add an output (part of it) from starting at the command line:

HHHHHHHHHHHHHHHHHH
:::: SETTING PARAM:  "geometry"  =  "0=0% 0% 100% 100% 0%;-1=0% 0% 100% 100% 100%" 
HHHHHHHHHHHHHHHHHH
WARNING: Unknown type : "fixed"
WARNING: Unknown type : "fixed"
END parsing of  "wipe" . Number of found parameters 4
compo request resize to  125 , ACTUAL SZ:  125 ,  true 0
compo resize  53 34399 - 34523  /  34399 - 34523
//// NO MOVE PERFORMED
!!!!!!!!!!!!!!!!!!!!!!!!!!
compo resize  53 34399 - 34523  /  34399 - 34523
===== QUERYING TRANSITION:  "mix"
===== QUERYING TRANSITION:  "mix"
===== QUERYING TRANSITION:  "mix"
===== QUERYING TRANSITION:  "mix"
===== QUERYING TRANSITION:  "qtblend"
===== QUERYING TRANSITION:  "qtblend"
===== QUERYING TRANSITION:  "qtblend"
===== QUERYING TRANSITION:  "qtblend"
################### ProjectClip::setproducer #################
################### ClipController::updateProducer
// replace finished:  "3"  :  <tractor>
:::: CHECKING MIX  FOR:  51
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  5334 , ID:  51 , index:  0 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  43
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  121 , ID:  43 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  44
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  2126 , ID:  44 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  45
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11913 , ID:  45 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  46
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  22723 , ID:  46 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  47
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  23463 , ID:  47 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  48
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  31471 , ID:  48 , index:  1 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  49
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  34399 , ID:  49 , index:  1 , TYPE: 11
qml: loaded clip with Astream:  0
qml: COMPOSITION POS CHANGED TO:  -1
qml: loaded composition:  121 , ID:  52 , index:  1
qrc:/qt/qml/org/kde/kdenlive/TimelineLogic.js:84: TypeError: Cannot read property 'trackInternalId' of null
qml: COMPOSITION POS CHANGED TO:  -1
qml: loaded composition:  34399 , ID:  53 , index:  1
qrc:/qt/qml/org/kde/kdenlive/TimelineLogic.js:84: TypeError: Cannot read property 'trackInternalId' of null
:::: CHECKING MIX  FOR:  33
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  0 , ID:  33 , index:  2 , TYPE: 6
qml: loaded clip with Astream:  0
:::: CHECKING MIX  FOR:  34
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  250 , ID:  34 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  35
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  2126 , ID:  35 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  36
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11472 , ID:  36 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  37
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11913 , ID:  37 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  38
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  18212 , ID:  38 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  39
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  23463 , ID:  39 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  40
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  31310 , ID:  40 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  41
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  32446 , ID:  41 , index:  2 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  28
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  250 , ID:  28 , index:  3 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  29
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11472 , ID:  29 , index:  3 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  30
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  18212 , ID:  30 , index:  3 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  31
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  32446 , ID:  31 , index:  3 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  20
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  121 , ID:  20 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  21
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  250 , ID:  21 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  22
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11472 , ID:  22 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  23
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  18212 , ID:  23 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  24
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  32446 , ID:  24 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  25
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  34399 , ID:  25 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  26
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  34485 , ID:  26 , index:  4 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  11
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  250 , ID:  11 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  12
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  2126 , ID:  12 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  13
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11472 , ID:  13 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  14
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11913 , ID:  14 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  15
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  18212 , ID:  15 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  16
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  23463 , ID:  16 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  17
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  31310 , ID:  17 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  18
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  32446 , ID:  18 , index:  5 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  4
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  121 , ID:  4 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  5
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  2126 , ID:  5 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  6
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  11913 , ID:  6 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  7
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  22723 , ID:  7 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  8
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  23463 , ID:  8 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  9
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  31471 , ID:  9 , index:  6 , TYPE: 3
qml: loaded clip with Astream:  1
:::: CHECKING MIX  FOR:  2
:::: CLIP HAS NO END MIX... FIRST MIX: -1
qml: loaded clip:  5334 , ID:  2 , index:  7 , TYPE: 3
qml: loaded clip with Astream:  1
==== NO PREVIOUS TIMELINE
::::::::::: connecting timeline:  QUuid("{6ef483fa-5d48-49d2-8fa8-25ec7e9a8dd5}") , DUR:  35239
root context get sub model new function
Model size of -2 is less than 0
=== FOUND THUMB IN CACHE
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:84:9: QML TimelineWaveform: Binding loop detected for property "waveOutPoint":
qrc:/qt/qml/org/kde/kdenlive/ClipAudioThumbs.qml:97:13
:::: CLOSE EVENT REQUESTED....
:::::CLOSING PROJECT, DISCARDING TASKS... CLOSING:  true
ZZZZZZZZZZZZZZZZZZZZZZZ

STARTING TASKMANAGER CLOSURE, ACTIVE THREADS:  0 
EXCEPTIONS:  QList()

Benedict_White · 2026-01-27 08:58:32

OK.... So I still have no solution but I did run a render on a previously composed project.

It produced a perfect video but I still can't see anything in the monitors in KDENLive.

So it appears to be a problem with just the monitor.

Arch Linux

#1 2026-01-13 20:44:44

KDENLive can no longer view/display H264 clips in its monitor

#2 2026-01-18 00:43:01

Re: KDENLive can no longer view/display H264 clips in its monitor

#3 2026-01-27 08:58:32

Re: KDENLive can no longer view/display H264 clips in its monitor

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