Openshot crashes when exporting video

[CBnation]

I made a small movie (1'10"), but when I try to export the video (using profile BluRay/AVCHD), openshot crashes after approximately 80% of the process. I have installed the latest openshot (1.4.3) on my Xubuntu 12.04. I had the same problem with openshot 1.4.0, which comes with Xubuntu 12.04 by default.

Full dump of command line below:

------------------------- ERROR 1 ------------------------------
Failed to import 'from openshot import main'
Error Message: cannot import name main
----------------------------------------------------------------
--------------------------------
   OpenShot (version 1.4.3)
--------------------------------
Process no longer exists: 3687. Creating new pid lock file.
No LADSPA plugins were found!

Check your LADSPA_PATH environment variable.

Detecting formats, codecs, and filters...
---
video_codecs:
  - a64multi
  - a64multi5
  - 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
  - qtrle
  - rawvideo
  - roqvideo
  - rv10
  - rv20
  - sgi
  - snow
  - svq1
  - targa
  - tiff
  - v210
  - v410
  - wmv1
  - wmv2
  - zlib
  - zmbv
  - libdirac
  - libschroedinger
  - libtheora
  - libvpx
  - libx264
  - libxvid
...
---
audio_codecs:
  - aac
  - ac3
  - ac3_fixed
  - alac
  - eac3
  - flac
  - mp2
  - nellymoser
  - real_144
  - vorbis
  - wmav1
  - wmav2
  - roq_dpcm
  - adpcm_adx
  - g722
  - g726
  - adpcm_ima_qt
  - adpcm_ima_wav
  - adpcm_ms
  - adpcm_swf
  - adpcm_yamaha
  - libgsm
  - libgsm_ms
  - libmp3lame
  - libspeex
  - libvo_aacenc
  - libvo_amrwbenc
  - libvorbis
...
---
formats:
  - a64
  - ac3
  - adts
  - adx
  - aiff
  - amr
  - asf
  - ass
  - asf_stream
  - au
  - avi
  - avm2
  - cavsvideo
  - crc
  - daud
  - dirac
  - dnxhd
  - dts
  - dv
  - eac3
  - ffm
  - ffmetadata
  - filmstrip
  - flac
  - flv
  - framecrc
  - framemd5
  - g722
  - gif
  - gxf
  - h261
  - h263
  - h264
  - image2
  - image2pipe
  - ipod
  - 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
  - sox
  - spdif
  - srt
  - swf
  - 3g2
  - 3gp
  - truehd
  - rcv
  - voc
  - wav
  - webm
  - yuv4mpegpipe
  - alsa
  - oss
...
state saved
project state modified
state saved
NEW SDL CONSUMER
on_mnuMakeMovie1_activate called with self.GtkImageMenuItem
on_tlbMakeMovie_clicked called with self.GtkImageMenuItem
on_cboExportType_changed
on_cboUploadServices_changed
on_cboProjectType_changed
on_cboExportTo_changed
on_cboProjectType_changed
on_btnExportVideo_clicked
NEW SDL CONSUMER
[libx264 @ 0xa31a1520] interlace + weightp is not implemented
[ac3_fixed @ 0xa3ffa780] channel_layout not specified
[ac3_fixed @ 0xa3ffa780] No channel layout specified. The encoder will guess the layout, but it might be incorrect.
[h264 @ 0x17620140] get_buffer() failed (-1 1 (nil))
[h264 @ 0x17620140] decode_slice_header error
[h264 @ 0x17620140] no frame!
[h264 @ 0x17620b00] get_buffer() failed (-1 0 (nil))
[h264 @ 0x17620b00] decode_slice_header error
[h264 @ 0x18885500] mmco: unref short failure
[h264 @ 0x17620140] get_buffer() failed (-1 1 (nil))
[h264 @ 0x17620140] decode_slice_header error
[h264 @ 0x17620140] no frame!
[h264 @ 0x17620b00] get_buffer() failed (-1 1 (nil))
[h264 @ 0x17620b00] decode_slice_header error
[h264 @ 0x17620b00] no frame!
[h264 @ 0x18885500] get_buffer() failed (-1 0 (nil))
[h264 @ 0x18885500] decode_slice_header error
[h264 @ 0x18885900] mmco: unref short failure
Segmentation fault (core dumped)

[Andy Finch (fincha)]

It looks as if there is a problem with the libx264 encoder. It's hard to guess what the problem might be. You could try transcoding your source files to a different format and see if that helps. But it appears as if libx264 is having problems with your source files.

[CBnation (cedric-baelemans)]

Not so familiar with the encoder. What can I do to test further? I would really like to get to the bottom of this problem. Any help appreciated.

[Andy Finch (fincha)]

The only thing I can think of at the moment is to try transcoding one of your files to a different format, using something like WinFF. If you follow the instructions here with one of your files:

https://answers.launchpad.net/openshot/+faq/983

You will most likely see the same messages in the terminal as you originally posted above.

But it's not possible for us to tell if there is a problem with how you're files were generated or the libx264 decoder itself.

[CBnation (cedric-baelemans)]

I checked out that link. My movies play just fine with both ffplay and melt. Also, sometimes I manage to export a video, but most of the times it fails. I also experience regular crashes of openshot while editing.

I googled on the errors I was getting, like the get_buffer() failed. On http://ubuntuforums.org/archive/index.php/t-1349956.html, they discuss the same problem but with another software. One thing mentioned is that Nvidia drivers could play a role. I have an Nvidia card. Can this play a role?

I'm currently at the point where openshot is too unstable to continue using. Never had this in the past on older ubuntu versions. I hope someone can help.

[Andy Finch (fincha)]

Did you try transcoding one of your files to another format?

[CBnation (cedric-baelemans)]

Just tried transcoding, without any errors. See below.

Is there a way to get a verbose output of openshot to see with which options it calls the different tools/libraries?

cedric@PC-living:~/Videos/hb0/deel1$ ffmpeg -i MAH00029.MP4 -vcodec libx264 -s 352x288 -b 300k -r 10 -acodec ac3 -ar 22050 -ab 64k -f mp4 output.mp4

ffmpeg version 0.8.4-4:0.8.4-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
  built on Nov 6 2012 16:50:25 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MAH00029.MP4':
  Metadata:
    major_brand : MSNV
    minor_version : 21364851
    compatible_brands: MSNVmp42isom
    creation_time : 2012-06-05 19:31:22
  Duration: 00:00:54.05, start: 0.000000, bitrate: 11028 kb/s
    Stream #0.0(und): Video: h264 (Main), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 10870 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
    Metadata:
      creation_time : 2012-06-05 19:31:22
    Stream #0.1(und): Audio: aac, 48000 Hz, stereo, s16, 128 kb/s
    Metadata:
      creation_time : 2012-06-05 19:31:22
[buffer @ 0x9b804c0] w:1920 h:1080 pixfmt:yuv420p
[scale @ 0x9b7a680] w:1920 h:1080 fmt:yuv420p -> w:352 h:288 fmt:yuv420p flags:0x4
Incompatible sample format 's16' for codec 'ac3', auto-selecting format 'flt'
[libx264 @ 0x9b7f8c0] using SAR=16/11
[libx264 @ 0x9b7f8c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2
[libx264 @ 0x9b7f8c0] profile Main, level 1.3
[libx264 @ 0x9b7f8c0] 264 - core 120 r2151 a3f4407 - H.264/MPEG-4 AVC codec - Copyleft 2003-2011 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=0 b_adapt=1 b_bias=0 direct=1 weightb=0 open_gop=1 weightp=2 keyint=250 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=300 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.25 aq=1:1.00
Output #0, mp4, to 'output.mp4':
  Metadata:
    major_brand : MSNV
    minor_version : 21364851
    compatible_brands: MSNVmp42isom
    creation_time : 2012-06-05 19:31:22
    encoder : Lavf53.21.0
    Stream #0.0(und): Video: libx264, yuv420p, 352x288 [PAR 16:11 DAR 16:9], q=-1--1, 300 kb/s, 10 tbn, 10 tbc
    Metadata:
      creation_time : 2012-06-05 19:31:22
    Stream #0.1(und): Audio: ac3, 22050 Hz, stereo, flt, 64 kb/s
    Metadata:
      creation_time : 2012-06-05 19:31:22
Stream mapping:
  Stream #0.0 -> #0.0
  Stream #0.1 -> #0.1
Press ctrl-c to stop encoding
Input stream #0.1 frame changed from rate:48000 fmt:s16 ch:2 to rate:48000 fmt:flt ch:2
Warning, using s16 intermediate sample format for resampling
frame= 542 fps= 14 q=21.0 Lsize= 2412kB time=53.92 bitrate= 366.5kbits/s dup=0 drop=1078
video:1976kB audio:421kB global headers:0kB muxing overhead 0.625923%
frame I:3 Avg QP:15.80 s...

[CBnation (cedric-baelemans)]

I just did a fresh install of ubuntu 12.10, installed openshot, the libavformat-extra and tried to export my video. Exactly the same error. This drives me crazy. Impossible to continue to use openshot like this.