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TerminalHash

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Registered: 2025-10-16

Posts: 2

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kdenlive: unavailable to use some filters

First, I created a ticket in the program's repository, but they told me to come here, as it was a problem on the distro side.

When I try to use a filter, such as Zoom Pan, it constantly displays the same error, making it impossible to use this filter:

XML parsing of  "avfilter.zoompan" . found 4 parameters
QLocale: Default value is QVariant(double, 1) parsed: "1"
QLocale: Default value is QVariant(double, 0) parsed: "0"
QLocale: Default value is QVariant(double, 0) parsed: "0"
WARNING: Unknown type : "fixed"
WARNING: Unknown type : "fixed"
QLocale: Default value is QVariant(double, 90) parsed: "90"
END parsing of  "avfilter.zoompan" . Number of found parameters 3
=== FILTERING EFFECT:  "avfilter.zoompan"
=== FILTERING EFFECT:  "avfilter.zoompan"  WILL BE VISIBLE+++++++++
=== FILTERING EFFECT:  "avfilter.zoompan"
=== FILTERING EFFECT:  "avfilter.zoompan"  WILL BE VISIBLE+++++++++
QLocale: Could not load double parameter ""
QLocale: Could not load double parameter ""
:::: UPDATING TREE HEIGHT....
:::: UPDATING TREE HEIGHT, TOTAL:  0 , CURRENTR:  0
MUTEX UNLOCK!!!!!!!!!!!! loadEffects
[swscaler @ 0x7f95344cefc0] Unsupported input (Неподдерживаемая операция): fmt:yuyv422 csp:bt709 prim:(null) trc:bt709 -> fmt:yuv422p csp:unknown prim:(null) trc:bt709
MLT: "[filter avfilter.zoompan ] Cannot get frame from buffer sink"
MLT: "[filter avfilter.zoompan ] Unexpected return format"
[swscaler @ 0x7f95344cefc0] Unsupported input (Неподдерживаемая операция): fmt:yuyv422 csp:bt709 prim:(null) trc:bt709 -> fmt:yuv422p csp:unknown prim:(null) trc:bt709
MLT: "[filter avfilter.zoompan ] Cannot get frame from buffer sink"
MLT: "[filter avfilter.zoompan ] Unexpected return format"
[swscaler @ 0x7f95344cefc0] Unsupported input (Неподдерживаемая операция): fmt:yuyv422 csp:bt709 prim:(null) trc:bt709 -> fmt:yuv422p csp:unknown prim:(null) trc:bt709
MLT: "[filter avfilter.zoompan ] Cannot get frame from buffer sink"
MLT: "[filter avfilter.zoompan ] Unexpected return format"
:::: UPDATING TREE HEIGHT....
:::: UPDATING TREE HEIGHT, TOTAL:  104 , CURRENTR:  0

And there are several such broken filters.

unixman

Member

Registered: 2015-03-12

Posts: 181

Re: kdenlive: unavailable to use some filters

it seems kdenlive use ffmpeg's libavfilter under the hood.
So you you able to use that filters directly via ffmpeg cmd or all other ffmpeg based video editors.
that Qt/KDE filter wrapper seems can't parsed properly. maybe that filter obsoled/unmaintained(Qt/KDE side).
check  ffmpeg manual for that filter to verify KDE's wrapper.

NB: it parsed double 1 as 1 NOT  1.0  not sure its true or wrong.
maybe that parameters need DOT as seperator eg 1.0

Last edited by unixman (2025-10-18 06:28:08)

TerminalHash

Member

Registered: 2025-10-16

Posts: 2

Website

Re: kdenlive: unavailable to use some filters

Based on the fact that the appimage version works without any problems, this is either a problem with some packages in the repositories, because kdenlive expects certain values but receives others.