test@workstation-91-i586-20210716 ~ $ mplayer testflv.flv
MPlayer 1.4-8 (C) 2000-2019 MPlayer Team
225 audio & 465 video codecs

Playing testflv.flv.
Cache fill: 11.46% (961436 bytes)   

libavformat version 58.45.100 (external)
Mismatching header version 58.27.102
libavformat file format detected.
[lavf] stream 1: audio (mp3float), -aid 0
[lavf] stream 2: video (flv), -vid 0
VIDEO:  [FLV1]  320x240  0bpp  29.970 fps  262.1 kbps (32.0 kbyte/s)
[VO_XV] It seems there is no Xvideo support for your video card available.
[VO_XV] Run 'xvinfo' to verify its Xv support and read
[VO_XV] DOCS/HTML/en/video.html#xv!
[VO_XV] See 'mplayer -vo help' for other (non-xv) video out drivers.
[VO_XV] Try -vo x11.
[VO_SDL] Using driver: x11.
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
libavcodec version 58.91.100 (external)
Mismatching header version 58.51.100
Selected video codec: [ffflv] vfm: ffmpeg (FFmpeg Flash video)
==========================================================================
Clip info:
 audiodelay: 0
 canSeekToEnd: true
Load subtitles in ./
==========================================================================
Opening audio decoder: [mpg123] MPEG 1.0/2.0/2.5 layers I, II, III
AUDIO: 44100 Hz, 2 ch, s16le, 64.0 kbit/4.54% (ratio: 8000->176400)
Selected audio codec: [mpg123] afm: mpg123 (MPEG 1.0/2.0/2.5 layers I, II, III)
==========================================================================
AO: [alsa] 44100Hz 2ch s16le (2 bytes per sample)
Starting playback...
Movie-Aspect is undefined - no prescaling applied.
VO: [sdl] 320x240 => 320x240 Planar YV12 
Movie-Aspect is undefined - no prescaling applied.
VO: [sdl] 320x240 => 320x240 Planar YV12 
A:  -0.0 V:   0.0 A-V: -0.027 ct:  0.000   0/  0 ??% ??% ??,?% 0 0 10% 


MPlayer interrupted by signal 11 in module: flip_page
- MPlayer crashed by bad usage of CPU/FPU/RAM.
  Recompile MPlayer with --enable-debug and make a 'gdb' backtrace and
  disassembly. Details in DOCS/HTML/en/bugreports_what.html#bugreports_crash.
- MPlayer crashed. This shouldn't happen.
  It can be a bug in the MPlayer code _or_ in your drivers _or_ in your
  gcc version. If you think it's MPlayer's fault, please read
  DOCS/HTML/en/bugreports.html and follow the instructions there. We can't and
  won't help unless you provide this information when reporting a possible bug.