I'm running on debian testing+unstable and had this issue during few days between two libav upgrades, fixed now (same for Ubuntu according to package tracker)

If you get desperate you could try building kdenlive yourself. Might help if the issue is with the version of Ubuntu you are using.

See https://userbase.kde.org/Kdenlive/Manua ... rom_source

Or you could try a daily build https://userbase.kde.org/Kdenlive/Manua ... ily_builds since vpinon suggests that this defect has been fixed

Humm still not good for me.

I have just added the Sunab git ppa (HERE), and upgraded my packages.

But the issue is not gone.

Vpinon, could you please a bit more specific on how you've managed to solve the problem ?

Here the result given by my terminal for dpkg -s libav-tools, perhaps it helps :

Code: Select all

Package: libav-tools
Status: install ok installed
Priority: optional
Section: video
Installed-Size: 2885
Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
Architecture: amd64
Source: libav
Version: 6:11-1
Replaces: libavcodec-extra-53 (<< 4:0.6~)
Depends: libavcodec56 (>= 6:11~beta1) | libavcodec-extra-56 (>= 6:11), libavdevice55 (>= 6:11~beta1), libavfilter5 (>= 6:11~beta1), libavformat56 (>= 6:11~beta1), libavresample2 (>= 6:11~beta1), libavutil54 (>= 6:11~beta1), libc6 (>= 2.14), libsdl1.2debian (>= 1.2.11), libswscale3 (>= 6:11~beta1), libvdpau1 (>= 0.2), libx11-6
Pre-Depends: dpkg (>= 1.15.7.2~)
Suggests: frei0r-plugins (>= 1.3)
Conflicts: ffprobe
Description: Multimedia player, encoder and transcoder
 Libav is a complete, cross-platform solution to decode, encode, record,
 convert and stream audio and video.
 .
 This package contains the avplay multimedia player, the avconv audio
 and video encoder, and the avprobe stream analyzer.  They support most
 existing file formats (AVI, MPEG, OGG, Matroska, ASF...) and encoding
 formats (MPEG, DivX, MPEG4, AC3, DV...). Additionally, it contains the
 qt-faststart utility which rearranges Quicktime files to facilitate
 network streaming.
 .
 This package replaces the 'ffmpeg' command-line tool that was provided
 in earlier distroreleases.
Original-Maintainer: Debian Multimedia Maintainers <pkg-multimedia-maintainers@lists.alioth.debian.org>
Homepage: http://libav.org/


I just ran a dist-upgrade without other sources than the distro ones.
I've seen on mlt-dev list something related to a change in recent libav* (just accepted in debian/ubuntu) and MLT needed patch+rebuild to be fully functionnal again.

I don't know again which libav PPAs packages are built, maybe you should try without PPAs?

just seen that fixed mlt package in debian is libmlt6 0.9.2-2 while utopic is stuck to 0.9.2-1 => will probably fail.
sunab PPA got updated yesterday regarding libav change, latest mlt is 0.9.3+git20141002 => try using it for upgrade now?

Thanks Vpinon,

Updating seems to have fixed the issue. I am marking the thread as resolved.

Thanks again for your help.

I'm having the same issue.
14.10 and no audio rendering.
What steps should I take to get any updates I need to resolve the problem. I'm not particularly expert but I'm willing to learn so please be very specific.

Here's the output when I start Openshot from Terminal. It records an error at the end. It looks relevant to me.

------------------------- ERROR 1 ------------------------------
Failed to import 'from openshot import main'
Error Message: cannot import name main
----------------------------------------------------------------
--------------------------------
OpenShot (version 1.4.3)
--------------------------------
Process no longer exists: 6212. Creating new pid lock file.

Detecting formats, codecs, and filters...
---
video_codecs:
- a64multi
- a64multi5
- alias_pix
- asv1
- asv2
- bmp
- cljr
- dnxhd
- dpx
- dvvideo
- ffv1
- ffvhuff
- flashsv
- flv
- gif
- h261
- h263
- h263p
- huffyuv
- jpegls
- ljpeg
- mjpeg
- mpeg1video
- mpeg2video
- mpeg4
- msmpeg4v2
- msmpeg4
- pam
- pbm
- pcx
- pgm
- pgmyuv
- png
- ppm
- prores
- qtrle
- rawvideo
- roqvideo
- rv10
- rv20
- sgi
- sunrast
- svq1
- targa
- tiff
- utvideo
- v210
- v410
- wmv1
- wmv2
- xbm
- xwd
- zlib
- zmbv
- libopenjpeg
- libschroedinger
- libtheora
- libvpx
- libvpx-vp9
- libx264
- libxvid
...
---
audio_codecs:
- comfortnoise
- aac
- ac3
- ac3_fixed
- alac
- eac3
- flac
- mp2
- nellymoser
- real_144
- vorbis
- wmav1
- wmav2
- pcm_alaw
- pcm_f32be
- pcm_f32le
- pcm_f64be
- pcm_f64le
- pcm_mulaw
- pcm_s8
- pcm_s16be
- pcm_s16le
- pcm_s24be
- pcm_s24daud
- pcm_s24le
- pcm_s32be
- pcm_s32le
- pcm_u8
- pcm_u16be
- pcm_u16le
- pcm_u24be
- pcm_u24le
- pcm_u32be
- pcm_u32le
- roq_dpcm
- adpcm_adx
- g722
- g726
- adpcm_ima_qt
- adpcm_ima_wav
- adpcm_ms
- adpcm_swf
- adpcm_yamaha
- libgsm
- libgsm_ms
- libmp3lame
- libopus
- libspeex
- libvorbis
...
---
formats:
- a64
- ac3
- adts
- adx
- aiff
- amr
- asf
- ****
- asf_stream
- au
- avi
- avm2
- cavsvideo
- crc
- daud
- dirac
- dnxhd
- dts
- dv
- eac3
- f4v
- ffmetadata
- filmstrip
- flac
- flv
- framecrc
- framemd5
- g722
- gif
- gxf
- h261
- h263
- h264
- hds
- hevc
- hls
- ilbc
- image2
- image2pipe
- ipod
- ismv
- ivf
- latm
- m4v
- md5
- matroska
- matroska
- mjpeg
- mlp
- mmf
- mov
- mp2
- mp3
- mp4
- mpeg
- vcd
- mpeg1video
- dvd
- svcd
- mpeg2video
- vob
- mpegts
- mpjpeg
- mxf
- mxf_d10
- null
- nut
- ogg
- oma
- alaw
- mulaw
- f64be
- f64le
- f32be
- f32le
- s32be
- s32le
- s24be
- s24le
- s16be
- s16le
- s8
- u32be
- u32le
- u24be
- u24le
- u16be
- u16le
- u8
- psp
- rawvideo
- rm
- roq
- rso
- rtp
- rtsp
- sap
- segment
- smjpeg
- smoothstreaming
- sox
- spdif
- srt
- swf
- 3g2
- 3gp
- truehd
- rcv
- voc
- wav
- webm
- wv
- yuv4mpegpipe
- alsa
- oss
...
state saved
on_tlbImportFiles_clicked called with self.GtkToolButton
project state modified
state saved
project state modified
state saved
project state modified
state saved
on_treeFiles_row_activated
on_mnuPreview_activate
project state modified
state saved
on_tlbPlay_clicked called with self.GtkToolButton
on_tlbPlay_clicked called with self.GtkToolButton
on_tlbPlay_clicked called with self.GtkToolButton
on_tlbArrow_clicked called with self.GtkRadioToolButton
on_tlbRazor_clicked called with self.GtkRadioToolButton
project state modified
state saved
project state modified
state saved
project state modified
state saved
project state modified
state saved
on_mnuRemoveClip_activate clicked
project state modified
state saved
on_mnuRemoveClip_activate clicked
project state modified
state saved
on_tlbMakeMovie_clicked called with self.GtkToolButton
on_cboExportType_changed
on_cboUploadServices_changed
on_cboProjectType_changed
on_cboExportTo_changed
on_cboProjectType_changed
on_cboProjectType_changed
on_cboProjectType_changed
on_btnExportVideo_clicked
NEW SDL CONSUMER
[ac3_fixed @ 0x32bc360] channel_layout not specified
[ac3_fixed @ 0x32bc360] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
[avi @ 0x3711680] Using AVStream.codec.time_base as a timebase hint to the muxer is deprecated. Set AVStream.time_base instead.
[consumer avformat] error writing flushed audio frame
on_frmExportVideo_destroy
NEW SDL CONSUMER

this is a kdenlive forum not an open shot forum.

I had the same problem in both and simply forgot which I was posting in. I assume the issue in both was linked. However, I updated everything I could think of and one of them has solved the problem in Kdenlive and Openshot . A bit of a blunderbus approach but it's worked.