I get a segfault when trying it with a video file and an audio file: QWidget::insertAction: Attempt to insert null action QWidget::insertAction: Attempt to insert null action "/org/freedesktop/UDisks2/drives/SAMSUNG_HD103SJ_S246J9CB127043" : property "Drive" does not exist "/org/freedesktop/UDisks2/drives/Optiarc_DVD_RW_AD_5260S" : property "Drive" does not exist Advanced probing on /dev/sr1 failed while reading block size kdenlive(29542) KSambaSharePrivate::testparmParamValue: We got some errors while running testparm "Load smb config files from /etc/samba/smb.conf Error loading services. " kdenlive(29542) KSambaSharePrivate::findSmbConf: KSambaShare: Could not find smb.conf! "/org/freedesktop/UDisks2/drives/SAMSUNG_HD103SJ_S246J9CB127043" : property "DeviceNumber" does not exist "/org/freedesktop/UDisks2/drives/SAMSUNG_HD103SJ_S246J9CB127043" : property "Device" does not exist "/org/freedesktop/UDisks2/drives/Optiarc_DVD_RW_AD_5260S" : property "DeviceNumber" does not exist "/org/freedesktop/UDisks2/drives/Optiarc_DVD_RW_AD_5260S" : property "Device" does not exist [wav @ 0x7f41ac008920] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x7f41ac009f60] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x7f41ac0d3a40] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x7f41ac0d56a0] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3880360] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x37c7a80] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x37f3260] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x37e5920] max_analyze_duration 5000000 reached at 5015510 microseconds kdenlive(29542)/kio (KDirModel) KDirModelPrivate::_k_slotDeleteItems: No node found for item that was just removed: KUrl("f[...]") Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory [swscaler @ 0x7f41a2ce81a0] Warning: data is not aligned! This can lead to a speedloss Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory [wav @ 0x4492800] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3fc0300] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3beb200] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3bfd680] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3fa5540] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x3bd2e60] max_analyze_duration 5000000 reached at 5015510 microseconds Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory [wav @ 0x7f416924af60] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x7f416851fe80] max_analyze_duration 5000000 reached at 5015510 microseconds Loading envelope ... Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory Calculating the envelope (93178 frames) took 21210 ms. [wav @ 0x49aad60] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x49ab6e0] max_analyze_duration 5000000 reached at 5015510 microseconds Loading envelope ... [wav @ 0x44339a0] max_analyze_duration 5000000 reached at 5015510 microseconds [wav @ 0x49c8100] max_analyze_duration 5000000 reached at 5015510 microseconds Calculating the envelope (191787 frames) took 19792 ms. [1] 29542 segmentation fault (core dumped) kdenlive The video file (mediainfo): General Complete name : [..] Format : MPEG-4 Format profile : JVT Codec ID : avc1 File size : 1.04 GiB Duration : 18mn 29s Overall bit rate : 8 065 Kbps Encoded date : UTC 2008-01-01 00:52:21 Tagged date : UTC 2008-01-01 00:52:21 AMBA :  Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : Main@L4.1 Format settings, CABAC : Yes Format settings, ReFrames : 4 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 18mn 29s Bit rate mode : Variable Bit rate : 7 930 Kbps Width : 1 440 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 29.970 fps Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.170 Stream size : 1.02 GiB (98%) Title : Ambarella AVC Language : English Encoded date : UTC 2008-01-01 00:52:21 Tagged date : UTC 2008-01-01 00:52:21 Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Audio ID : 2 Format : AAC Format/Info : Advanced Audio Codec Format profile : LC Codec ID : 40 Duration : 18mn 28s Bit rate mode : Constant Bit rate : 128 Kbps Channel(s) : 2 channels Channel positions : Front: L R Sampling rate : 48.0 KHz Compression mode : Lossy Stream size : 16.9 MiB (2%) Title : Ambarella AAC Language : English Encoded date : UTC 2008-01-01 00:52:21 Tagged date : UTC 2008-01-01 00:52:21 The audio file: (mediainfo) General Complete name : ~ Format : Wave File size : 1.05 GiB Duration : 1h 46mn Overall bit rate mode : Constant Overall bit rate : 1 411 Kbps Producer : TASCAM Linear PCM Recoder DR-05 Encoded date : 2012-01-16 22:52:39 Audio Format : PCM Format settings, Endianness : Little Format settings, Sign : Signed Codec ID : 1 Duration : 1h 46mn Bit rate mode : Constant Bit rate : 1 411.2 Kbps Channel(s) : 2 channels Sampling rate : 44.1 KHz Bit depth : 16 bits Stream size : 1.05 GiB (100%) running on Arch 64 bit.