Rendering of E:/Vídeos/Propagandas/Kdenlive/planalto/jaciraeborges.mp4 crashed mlt_repository_init: failed to dlopen E:\Documentos\Kdenlive-16.12.1-w64\kdenlive-windows\lib\mlt/libmltvidstab.dll ("E:\Documentos\Kdenlive-16.12.1-w64\kdenlive-windows\lib\mlt\libmltvidstab.dll": Não foi possível encontrar o módulo especificado.) medium: [ ref=1, _mlt_properties_load=medium, __mlt_properties_load=medium ] Current Frame: 1, percentage: 0 [mp4 @ 0000000002d7ddc0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [mp4 @ 0000000002d7ddc0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [mp4 @ 0000000002d7ddc0] muxer does not support non seekable output [consumer avformat] Could not write header 'pipe:' Rendering of E:/Vídeos/Propagandas/Kdenlive/jaciraeborges.mp4 crashed mlt_repository_init: failed to dlopen E:\Documentos\Kdenlive-16.12.1-w64\kdenlive-windows\lib\mlt/libmltvidstab.dll ("E:\Documentos\Kdenlive-16.12.1-w64\kdenlive-windows\lib\mlt\libmltvidstab.dll": Não foi possível encontrar o módulo especificado.) medium: [ ref=1, _mlt_properties_load=medium, __mlt_properties_load=medium ] Current Frame: 1, percentage: 0 [mp4 @ 0000000002c2daa0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [mp4 @ 0000000002c2daa0] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [mp4 @ 0000000002c2daa0] muxer does not support non seekable output [consumer avformat] Could not write header 'pipe:'
Possibly related with non-ascii symbols in path. I got the same error when tried to render .mp4 to some cyrillic path, and .webm just silently finished without generating any file. When I tried render to "E:\tmp\1.mp4" problem disappeared.
Please try with the actual Kdenlive version 18.08.2 Try without/avoid non ascii characters.
The rendering issue on Windows should be fixed. Please try with version 20.08.1. We close this bug. If it still appears in the latest version, please feel free to re-open it and update the affected version number.