On Compositor freeze: it was freezing in all my versions of CinelerraGG compiled after 2019-11-07. You don't even need to enable click-to-play, just enable zoom mode, click inside canvas so zoom bar appear and zoom set itself to 1.3 and then click on indicator area. Compositor freezed. Then I tried to play with lables. Set cursor (on empty black space outside of any track) somewhere and then clicked icon 'Add label in current position' in main window. It worked. I tried to click-and-hold this label with LMB. It worked, too. Now, not releasing LMB I dragged label right (beyond media end) and left (again, much left, so label become invisible), and then again right (all without releasing LMB). Now, I can't see label o.O It still here in Resources/Labels , but sometimes with strange time. In terminal I saw this: LANG=C cin Cinelerra Infinity - built: Feb 28 2020 20:17:26 git://git.cinelerra-gg.org/goodguy/cinelerra.git (c) 2006-2019 Heroine Virtual Ltd. by Adam Williams 2007-2020 mods for Cinelerra-GG by W.P.Morrow aka goodguy Cinelerra is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. There is absolutely no warranty for Cinelerra. MainUndo::update_undo_before 91 "": must be on an after entry to do this. size=9 UndoStack::dump 0 0xe633540 4 0000 * k 1 0xdee63a0 label 5892 0010 k 2 0xdec1810 label 5837 0010 3 0xdee3b48 drag label 978 0010 4 0xdee38f0 drag label 4 0010 k 5 0xde81e60 label 5829 0010 k 6 0xea40e28 label 5795 0010 7 0xee2b588 load 3257 ffffffff k 8 0xdd65718 load 4948 ffffffff MainUndo::update_undo_after 141 "label": must be on a before entry to do this. size=10 UndoStack::dump 0 0xee45760 923 0000 * 1 0xe633540 4 0000 k 2 0xdee63a0 label 5892 0010 k 3 0xdec1810 label 5837 0010 4 0xdee3b48 drag label 978 0010 5 0xdee38f0 drag label 4 0010 k 6 0xde81e60 label 5829 0010 k 7 0xea40e28 label 5795 0010 8 0xee2b588 load 3257 ffffffff k 9 0xdd65718 load 4948 ffffffff MainUndo::update_undo_before 91 "drag label": must be on an after entry to do this. size=11 UndoStack::dump k 0 0xde81fe0 label 5892 0010 * 1 0xee45760 label 923 0010 2 0xe633540 4 0000 k 3 0xdee63a0 label 5892 0010 k 4 0xdec1810 label 5837 0010 5 0xdee3b48 drag label 978 0010 6 0xdee38f0 drag label 4 0010 k 7 0xde81e60 label 5829 0010 k 8 0xea40e28 label 5795 0010 9 0xee2b588 load 3257 ffffffff k 10 0xdd65718 load 4948 ffffffff Session time: 0:04:08 Cpu time: user: 0:01:30.600 sys: 0:00:06.547 Additionally, just re-introduced Ogg/Theora video, while working in itself warns me in MPlayer: mplayer /dev/shm/12.ogg MPlayer SVN-r38152-5.5.0 (C) 2000-2019 MPlayer Team Playing /dev/shm/12.ogg. libavformat version 58.33.100 (internal) libavformat file format detected. [theora @ 0x577347e0]7 bits left in packet 82 [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. [lavf] stream 0: video (theora), -vid 0 [lavf] stream 1: audio (vorbis), -aid 0 VIDEO: [theo] 720x400 0bpp 25.000 fps 0.0 kbps ( 0.0 kbyte/s) ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family libavcodec version 58.59.102 (internal) [theora @ 0x577347e0]7 bits left in packet 82 Selected video codec: [fftheora] vfm: ffmpeg (FFmpeg Theora) ========================================================================== Load subtitles in /dev/shm/ ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 48000 Hz, 2 ch, floatle, 128.0 kbit/4.17% (ratio: 16000->384000) Selected audio codec: [ffvorbis] afm: ffmpeg (FFmpeg Vorbis) ========================================================================== [AO OSS] audio_setup: Can't open audio device /dev/dsp: No such file or directory [AO_ALSA] alsa-lib: confmisc.c:1281:(snd_func_refer) Unable to find definition 'defaults.pcm.dmix.channels' [AO_ALSA] alsa-lib: conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory [AO_ALSA] alsa-lib: conf.c:5036:(snd_config_expand) Args evaluate error: No such file or directory [AO_ALSA] alsa-lib: pcm.c:2564:(snd_pcm_open_noupdate) Unknown PCM dmix:SB [AO_ALSA] Playback open error: No such file or directory [AO ARTS] loading the aRts backend "/usr/lib/libartscbackend.la" failed [AO ESD] esd_open_sound failed: Connection timed out Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started [JACK] cannot open server [AO SDL] Samplerate: 48000Hz Channels: Stereo Format floatle [AO SDL] Unsupported audio format: 0x1d. [AO_ALSA] alsa-lib: confmisc.c:1281:(snd_func_refer) Unable to find definition 'defaults.pcm.dmix.channels' [AO_ALSA] alsa-lib: conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory [AO_ALSA] alsa-lib: conf.c:5036:(snd_config_expand) Args evaluate error: No such file or directory [AO_ALSA] alsa-lib: pcm.c:2564:(snd_pcm_open_noupdate) Unknown PCM dmix:SB [AO SDL] Unable to open audio: No available audio device [AO_ALSA] alsa-lib: confmisc.c:1281:(snd_func_refer) Unable to find definition 'defaults.pcm.dmix.channels' [AO_ALSA] alsa-lib: conf.c:4568:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory [AO_ALSA] alsa-lib: conf.c:5036:(snd_config_expand) Args evaluate error: No such file or directory [AO_ALSA] alsa-lib: pcm.c:2564:(snd_pcm_open_noupdate) Unknown PCM dmix:SB AL lib: (EE) alsa_open_playback: Could not open playback device 'default': No such file or directory [OpenAL] could not open device DVB card number must be between 1 and 4 AO: [null] 48000Hz 2ch floatle (4 bytes per sample) Starting playback... Movie-Aspect is 1.80:1 - prescaling to correct movie aspect. VO: [xv] 720x400 => 720x400 Planar YV12 [VD_FFMPEG] DRI failure. Movie-Aspect is 1.80:1 - prescaling to correct movie aspect. VO: [xv] 720x400 => 720x400 Planar YV12 A: 0.1 V: 0.0 A-V: 0.088 ct: 0.000 0/ 0 ??% ??% ??,?% 0 0 [VD_FFMPEG] DRI failure. A: 2.2 V: 2.2 A-V: -0.000 ct: -0.000 0/ 0 2% 2% 0.4% 0 0 [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. A: 3.4 V: 3.4 A-V: -0.000 ct: -0.000 0/ 0 1% 2% 0.4% 0 0 [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. A: 3.6 V: 3.6 A-V: -0.000 ct: -0.000 0/ 0 1% 2% 0.4% 0 0 [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. A: 4.1 V: 4.1 A-V: 0.000 ct: -0.000 0/ 0 1% 1% 0.4% 0 0 [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. [ogg @ 0x575dc9e0]Broken file, keyframe not correctly marked. A: 10.2 V: 10.2 A-V: 0.037 ct: 0.110 0/ 0 0% 0% 0.5% 0 0 -- ignore audio init fail, just some .asoundrc trouble under root. (keyframe/forced keyframe in vid. codec settings were left at 64) may be false alarm, will try to update MPlayer :}