Same issue here (ubuntu 12.04). Bypassed using ffmpegthumbnailer:
1. sudo apt-get install ffmpegthumbnailer 2. sudo cp /usr/share/thumbnailers/totem.thumbnailer ~/totem.thumbnailer .bak 3. sudo gedit /usr/share/thumbnailers/totem.thumbnailer 4. replace the text with this one:
[Thumbnailer Entry] TryExec=/usr/bin/ffmpegthumbnailer Exec=/usr/bin/ffmpegthumbnailer -s %s -i %i -o %o -c png -f MimeType=application/mxf;application/ogg;application/ram;application/sdp;application/vnd.ms-wpl;application/vnd.rn-realmedia;application/x-extension-m4a;application/x-extension-mp4;application/x-flash-video;application/x-matroska;application/x-netshow-channel;application/x-ogg;application/x-quicktimeplayer;application/x-shorten;image/vnd.rn-realpix;image/x-pict;misc/ultravox;text/x-google-video-pointer;video/3gpp;video/dv;video/fli;video/flv;video/mp2t;video/mp4;video/mp4v-es;video/mpeg;video/msvideo;video/ogg;video/quicktime;video/vivo;video/vnd.divx;video/vnd.rn-realvideo;video/vnd.vivo;video/webm;video/x-anim;video/x-avi;video/x-flc;video/x-fli;video/x-flic;video/x-flv;video/x-m4v;video/x-matroska;video/x-mpeg;video/x-ms-asf;video/x-ms-asx;video/x-msvideo;video/x-ms-wm;video/x-ms-wmv;video/x-ms-wmx;video/x-ms-wvx;video/x-nsv;video/x-ogm+ogg;video/x-theora+ogg;video/x-totem-stream;audio/x-pn-realaudio;audio/3gpp;audio/ac3;audio/AMR;audio/AMR-WB;audio/basic;audio/midi;audio/mp2;audio/mp4;audio/mpeg;audio/ogg;audio/prs.sid;audio/vnd.rn-realaudio;audio/x-aiff;audio/x-ape;audio/x-flac;audio/x-gsm;audio/x-it;audio/x-m4a;audio/x-matroska;audio/x-mod;audio/x-mp3;audio/x-mpeg;audio/x-ms-asf;audio/x-ms-asx;audio/x-ms-wax;audio/x-ms-wma;audio/x-musepack;audio/x-pn-aiff;audio/x-pn-au;audio/x-pn-wav;audio/x-pn-windows-acm;audio/x-realaudio;audio/x-real-audio;audio/x-sbc;audio/x-speex;audio/x-tta;audio/x-wav;audio/x-wavpack;audio/x-vorbis;audio/x-vorbis+ogg;audio/x-xm;application/x-flac;
5. save and quit 6. delete all folders in ~/.thumbnails; 7. restart nautilus.
(credit: http://is.gd/i4VmLt)
Same issue here (ubuntu 12.04).
Bypassed using ffmpegthumbnailer:
1. sudo apt-get install ffmpegthumbnailer thumbnailers/ totem.thumbnail er ~/totem.thumbnailer .bak thumbnailers/ totem.thumbnail er
2. sudo cp /usr/share/
3. sudo gedit /usr/share/
4. replace the text with this one:
[Thumbnailer Entry] /usr/bin/ ffmpegthumbnail er bin/ffmpegthumb nailer -s %s -i %i -o %o -c png -f application/ mxf;application /ogg;applicatio n/ram;applicati on/sdp; application/ vnd.ms- wpl;application /vnd.rn- realmedia; application/ x-extension- m4a;application /x-extension- mp4;application /x-flash- video;applicati on/x-matroska; application/ x-netshow- channel; application/ x-ogg;applicati on/x-quicktimep layer;applicati on/x-shorten; image/vnd. rn-realpix; image/x- pict;misc/ ultravox; text/x- google- video-pointer; video/3gpp; video/dv; video/fli; video/flv; video/mp2t; video/mp4; video/mp4v- es;video/ mpeg;video/ msvideo; video/ogg; video/quicktime ;video/ vivo;video/ vnd.divx; video/vnd. rn-realvideo; video/vnd. vivo;video/ webm;video/ x-anim; video/x- avi;video/ x-flc;video/ x-fli;video/ x-flic; video/x- flv;video/ x-m4v;video/ x-matroska; video/x- mpeg;video/ x-ms-asf; video/x- ms-asx; video/x- msvideo; video/x- ms-wm;video/ x-ms-wmv; video/x- ms-wmx; video/x- ms-wvx; video/x- nsv;video/ x-ogm+ogg; video/x- theora+ ogg;video/ x-totem- stream; audio/x- pn-realaudio; audio/3gpp; audio/ac3; audio/AMR; audio/AMR- WB;audio/ basic;audio/ midi;audio/ mp2;audio/ mp4;audio/ mpeg;audio/ ogg;audio/ prs.sid; audio/vnd. rn-realaudio; audio/x- aiff;audio/ x-ape;audio/ x-flac; audio/x- gsm;audio/ x-it;audio/ x-m4a;audio/ x-matroska; audio/x- mod;audio/ x-mp3;audio/ x-mpeg; audio/x- ms-asf; audio/x- ms-asx; audio/x- ms-wax; audio/x- ms-wma; audio/x- musepack; audio/x- pn-aiff; audio/x- pn-au;audio/ x-pn-wav; audio/x- pn-windows- acm;audio/ x-realaudio; audio/x- real-audio; audio/x- sbc;audio/ x-speex; audio/x- tta;audio/ x-wav;audio/ x-wavpack; audio/x- vorbis; audio/x- vorbis+ ogg;audio/ x-xm;applicatio n/x-flac;
TryExec=
Exec=/usr/
MimeType=
5. save and quit
6. delete all folders in ~/.thumbnails;
7. restart nautilus.
(credit: http:// is.gd/i4VmLt)