SMPlayer Support Forum

Start smplayer, choose Video/Thumbnail Generator, choose options, click generate. One of two failure modes then occur.
First failure mode: dialog complaining 'The file /tmp/smplayer_preview/00000001.jpg doesn't exist. (It does, created manually). Or it says that file 'can't be loaded'.
Second failure mode: A small dialog with titlebar 'Thutor' appears briefly, followed by the Plasmashell 'oops' showing a mpv crash.

This problem started appearing on five different systems immediately after upgrading to Fedora 33 (from, variously, F30, F31, F32 one version at a time). On all five systems the thumbnail generator worked fine on F30 through F32. It still works on an up-to-date ubuntu 20.04.1 LTS.
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[20-12-19-15:28] 20<Lacrocivious>30 I use the Thumbnail Generator in smplayer with mpv backend extensively. This worked very well until I upgraded five different systems variously from Fedora 30, 31, and 32 to 33. Now it is broken on all five F33 systems but still works on an up-to-date Ubuuntu 20.04.1 LTS system. Is this a known issue? I've not found anything from DDG searches
[20-12-19-15:29] 20<Lacrocivious>30 I learned in #mpv that Fedora does not package mpv at all, so I must have gotten mpv from rpmfusion. Might the package maintainer for mpv for rpmfusion be lurking about?
[20-12-19-15:38] 19<leigh123linux> Lacrocivious: mpv doesn't do thumbnails
[20-12-19-15:40] 20<Lacrocivious>30 leigh123linux: Ah, thanks, that is useful information. Thumbnails are coming then from ffmpeg?
[20-12-19-15:40] 18<28leigh123linux18> Maybe smplayer was broken by my recent update to mpv-0.33.0 update
[20-12-19-15:41] 19<leigh123linux> Lacrocivious: Try installing ffmpegthumbnailer
[20-12-19-15:41] 20<Lacrocivious>30 I attempted ABRT report but eventually got: Retrace server is unable to process package 'mpv-0.33.0-1.fc33.x86_64'
[20-12-19-15:41] 20<Lacrocivious>30 ffmpegthumbnailer is installed
[20-12-19-15:42] 20<Lacrocivious>30 It may or may not have been updated in the (4 to 5 thousand) packages upgraded during F3x to F33
[20-12-19-15:44] 19<leigh123linux> Lacrocivious: What filemanager is failing to show thumbnails
[20-12-19-15:44] 20<Lacrocivious>30 On one sysstem kffmpegthumbnailer is also installed but this appears to make no difference. On the other systems only ffmpegthumbnailer is installed
[20-12-19-15:44] 20<Lacrocivious>30 Dolphin is showing thumbnails fine. It is only generating thumbnails from within smplayer that stopped working with F33
[20-12-19-15:46] 20<Lacrocivious>30 Unfortunately I am not a coder and I am thus uncertain about what tree to be barking up at May very well not be anything to do with mpv
[20-12-19-15:53] 20<Lacrocivious>30 leigh123linux: By the way I am honored to speak with you. I have certainly benefitted from your myriad contributions to several projects
[20-12-19-16:18] 19<leigh123linux> Lacrocivious: I can reproduce the smplayer thumbnail generator issue with mpv, it works fine with mplayer
[20-12-19-16:19] 19<leigh123linux> Lacrocivious: Can you file an issue against smplayer, maybe it needs changes for newer mpv

What version of smplayer are you using?

I'm not using Fedora 33, but smplayer 20.6.0 with mpv 0.33 works fine in my computer with Ubuntu.

Thank you for your quick response!

Each of the five Fedora 33 systems has the same smplayer and mpv packages. They all run under the KDE Plasma 5 desktop environment. The first uname -a line below is from the most recently built system, a Ryzen 7 3700X with Radeon RX 5600 XT. These five systems differ in CPU and GPU between AMD, Intel, and nVidia:

SMPlayer Version: 20.6.0 (revision 9418)
mpv-0.33.0-1.fc33.x86_64
mpv-libs-0.33.0-1.fc33.x86_64
mpv-libs-devel-0.33.0-1.fc33.x86_64
ffmpegthumbnailer-2.2.2-6.fc33.x86_64
Linux kahaba.cos.lan 5.9.13-200.fc33.x86_64 #1 SMP Tue Dec 8 15:42:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

All five systems exhibit the Thumbnail Generator failure with Fedora 33, and all five worked fine with it through Fedora 32.

A single system that has not been upgraded to Fedora 33 -- an old hp530 notebook -- is running Fedora 32 under KDE Plasma desktop environment, and Thumbnail Generator works fine on it:

smplayer-20.6.0-3.fc32.x86_64
mpv-0.32.0-6.fc32.x86_64
ffmpegthumbnailer-2.2.2-3.fc32.x86_64
Linux meretrix.cos.lan 5.8.15-201.fc32.x86_64 #1 SMP Thu Oct 15 15:56:44 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

My Ubuntu system also works fine with the Thumbnail Generator. It is an old Intel Core2 Duo E4500 with AMD Radeon HD 4830, under the GNOME desktop environment:

smplayer/focal,now 19.10.2~ds0-1build1 amd64 [installed]
mpv/focal,now 0.32.0-1ubuntu1 amd64 [installed,automatic]
Linux sharmuta 5.4.0-58-generic #64-Ubuntu SMP Wed Dec 9 08:16:25 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

My Raspberry Pi 4 Model B also works fine with the Thumbnail Generator:

smplayer/stable,now 18.10.0~ds0-1+b2 armhf [installed]
mpv/stable,now 0.29.1-1 armhf [installed,automatic]
Linux raspberrypi 5.4.51-v7l+ #1333 SMP Mon Aug 10 16:51:40 BST 2020 armv7l GNU/Linux

Please send the smplayer log (menu View) after running the thumbnail generator. Maybe it could give me a clue about the cause of the problem.

The SMPlayer log is blank. However, the MPlayer/mvp log shows:

/usr/bin/mpv --no-config --no-quiet --terminal --no-msg-color --input-ipc-server=/tmp/smplayer-mpv-ac637 --msg-level=ffmpeg/demuxer=error --no-fs --hwdec=auto --sub-auto=fuzzy --audio-device=pulse/alsa_output.pci-0000_11_00.4.analog-surround-51 --ao=pulse, --no-input-default-bindings --input-vo-keyboard=no --no-input-cursor --cursor-autohide=no --no-keepaspect --wid=100663313 --monitorpixelaspect=1 --osd-level=1 --osd-scale=1.2 --osd-bar-align-y=0.6 --sub-ass --embeddedfonts --sub-ass-line-spacing=0 --sub-scale=1 --sub-font=Arial --sub-color=#ffffffff --sub-shadow-color=#ff000000 --sub-border-color=#ff000000 --sub-border-size=0.75 --sub-shadow-offset=2.5 --sub-font-size=50 --sub-bold=no --sub-italic=no --sub-margin-y=8 --sub-margin-x=20 --sub-codepage=ISO-8859-1 --vid=1 --sub-pos=100 --volume=56 --cache=auto --start=7 --screenshot-template=cap_%F_%p_%02n --screenshot-format=jpg --screenshot-directory=/home/humpher/Pictures/smplayer_screenshots --audio-pitch-correction=yes --volume-max=110 --term-playing-msg=MPV_VERSION=${=mpv-version:}
INFO_VIDEO_WIDTH=${=width}
INFO_VIDEO_HEIGHT=${=height}
INFO_VIDEO_ASPECT=${=video-params/aspect}
INFO_VIDEO_FPS=${=container-fps:${=fps}}
INFO_VIDEO_FORMAT=${=video-format}
INFO_VIDEO_CODEC=${=video-codec}
INFO_AUDIO_FORMAT=${=audio-codec-name}
INFO_AUDIO_CODEC=${=audio-codec}
INFO_AUDIO_RATE=${=audio-params/samplerate}
INFO_AUDIO_NCH=${=audio-params/channel-count}
INFO_LENGTH=${=duration:${=length}}
INFO_DEMUXER=${=current-demuxer:${=demuxer}}
INFO_SEEKABLE=${=seekable}
INFO_TITLES=${=disc-titles}
INFO_CHAPTERS=${=chapters}
INFO_TRACKS_COUNT=${=track-list/count}
METADATA_TITLE=${metadata/by-key/title:}
METADATA_ARTIST=${metadata/by-key/artist:}
METADATA_ALBUM=${metadata/by-key/album:}
METADATA_GENRE=${metadata/by-key/genre:}
METADATA_DATE=${metadata/by-key/date:}
METADATA_TRACK=${metadata/by-key/track:}
METADATA_COPYRIGHT=${metadata/by-key/copyright:}
INFO_MEDIA_TITLE=${=media-title:}
INFO_STREAM_PATH=${stream-path}
--audio-client-name=SMPlayer --term-status-msg=STATUS: ${=time-pos} / ${=duration:${=length:0}} P: ${=pause} B: ${=paused-for-cache} I: ${=core-idle} VB: ${=video-bitrate:0} AB: ${=audio-bitrate:0} /pub/kahaba04/youtube-downloads/Former President Barack Obama's 2020 Democratic National Convention Speech _ FULL-YIfwrKHkYRA.mp4

(+) Video --vid=1 (*) (h264 1280x720 30.000fps)
(+) Audio --aid=1 (*) (aac 2ch 44100Hz)
Cannot load libcuda.so.1
Failed to open VDPAU backend libvdpau_radeonsi.so: cannot open shared object file: No such file or directory
Using hardware decoding (vaapi).
AO: [pulse] 44100Hz stereo 2ch float
VO: [gpu] 1280x720 vaapi[nv12]
INFO_VIDEO_DSIZE=1280x720
MPV_VERSION=mpv 0.33.0
INFO_VIDEO_WIDTH=1280
INFO_VIDEO_HEIGHT=720
INFO_VIDEO_ASPECT=1.777778
INFO_VIDEO_FPS=30.000000
INFO_VIDEO_FORMAT=h264
INFO_VIDEO_CODEC=h264 (H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10)
INFO_AUDIO_FORMAT=aac
INFO_AUDIO_CODEC=aac (AAC (Advanced Audio Coding))
INFO_AUDIO_RATE=44100
INFO_AUDIO_NCH=2
INFO_LENGTH=1157.283000
INFO_DEMUXER=lavf
INFO_SEEKABLE=yes
INFO_TITLES=
INFO_CHAPTERS=0
INFO_TRACKS_COUNT=2
METADATA_TITLE=
METADATA_ARTIST=
METADATA_ALBUM=
METADATA_GENRE=
METADATA_DATE=
METADATA_TRACK=
METADATA_COPYRIGHT=
INFO_MEDIA_TITLE=Former President Barack Obama's 2020 Democratic National Convention Speech _ FULL-YIfwrKHkYRA.mp4
INFO_STREAM_PATH=/pub/kahaba04/youtube-downloads/Former President Barack Obama's 2020 Democratic National Convention Speech _ FULL-YIfwrKHkYRA.mp4
INFO_TRACK_0: video 1 '' '' yes
INFO_TRACK_1: audio 1 '' '' yes

I'm afraid that log doesn't provide any information related to the problem.

Precisely as I suspected.

I have tried repeatedly to bug-report this with Fedora's 'Problem Reporting' ABRT, but after reporting fairly early with 'Retrace server is unable to process package 'mpv-0.33.0-1.fc33.x86_64'.', and offering to create a stack trace locally, after much downloading of debuginfo packages, it fails with:

--- Running report_Bugzilla ---
Logging into Bugzilla at https://bugzilla.redhat.com
Checking for duplicates
Creating a new bug
fatal: RPC failed at server. There is no component named 'mpv' in the 'Fedora' product.
('report_Bugzilla' exited with 1)

<sigh>.

So I am unable to report the bug at present, because I am too ignorant to know how to do a gdb backtrace that calls another program from within the program I told gdb to run. If you have a link that tells me how to do this -- I am sure there must be a way to have gdb include child programs -- I would appreciate it.

Thank you very much for your attention to this problem to date.

Be sure the "Log SMPlayer output" is enabled in preferences -> advanced -> logs.
Maybe with a log I could figure out what is going on.

This is maddening.

I did not have all the logging features enabled under 'Advanced' but they are all enabled now.
When I play a video and select Thumbnail Generator, the failure happens as before.
The new file ~/Documents/smplayer-logs/mpv-MPlayer.log is created.
The View/SMPlayer log is still *blank*!

So. Whatever is keeping Thumbnail Generator from working under Fedora 33 on five widely different systems is preventing the smplayer.log from being created, ABRT won't let me file a bugzilla report because there is no mpv package in Fedora (that means it has to be from rpmfusion), the ABRT crash text is not selectable for copy/paste, and the cause of this failure remains mysterious. Plus I don't know how to do a gdb trace for a program that calls child programs, and not being a coder, I am too stupid to figure out how.

Snakes on everything.

Thanks again for your help, and I suppose I will just have to wait until the problem is mysteriously fixed. Meanwhile, I will have to create all the thumbnails using the Ubuntu system, where Thumbnail Generator still works as intended.

Is the directory /tmp writable?

smplayer extracts the pictures from the video and temporary stores them in /tmp.