[FFmpeg-trac] #9090(ffmpeg:reopened): In the process of screen recording, adjusting the volume will cause confusion of screen recording progress bar

FFmpeg trac at avcodec.org
Wed Feb 3 04:12:54 EET 2021


#9090: In the process of screen recording, adjusting the volume will cause
confusion of screen recording progress bar
------------------------------------+------------------------------------
             Reporter:  HouLei      |                    Owner:
                 Type:  defect      |                   Status:  reopened
             Priority:  important   |                Component:  ffmpeg
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+------------------------------------
Changes (by HouLei):

 * cc: houlei@… (added)
 * priority:  normal => important
 * status:  closed => reopened
 * component:  undetermined => ffmpeg
 * resolution:  needs_more_info =>


Comment:

 houlei at houlei-PC:~/Desktop$ ffmpeg -f x11grab -framerate 25 -video_size
 1920*1080 -i :0.0  out.mp4
 ffmpeg version 4.1.6-1+dde Copyright (c) 2000-2020 the FFmpeg developers
   built with gcc 8 (Uos 8.3.0.3-3+rebuild)
   configuration: --prefix=/usr --extra-version=1+dde --toolchain=hardened
 --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu
 --arch=amd64 --enable-gpl --disable-stripping --enable-avresample
 --disable-filter=resample --enable-avisynth --enable-gnutls --enable-
 ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b
 --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite
 --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-
 libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-
 libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus
 --enable-libpulse --enable-librsvg --enable-librubberband --enable-
 libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-
 libssh --enable-libtheora --enable-libtwolame --enable-libvidstab
 --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp
 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq
 --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl
 --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883
 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
   libavutil      56. 22.100 / 56. 22.100
   libavcodec     58. 35.100 / 58. 35.100
   libavformat    58. 20.100 / 58. 20.100
   libavdevice    58.  5.100 / 58.  5.100
   libavfilter     7. 40.101 /  7. 40.101
   libavresample   4.  0.  0 /  4.  0.  0
   libswscale      5.  3.100 /  5.  3.100
   libswresample   3.  3.100 /  3.  3.100
   libpostproc    55.  3.100 / 55.  3.100
 [x11grab @ 0x55d65d3968c0] Stream #0: not enough frames to estimate rate;
 consider increasing probesize
 Input #0, x11grab, from ':0.0':
   Duration: N/A, start: 1612317357.270483, bitrate: N/A
     Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1920x1080, 25
 fps, 1000k tbr, 1000k tbn, 1000k tbc
 Cannot open libmwv206dec.so, libmwv206dec.so: cannot open shared object
 file: No such file or directory
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
 Press [q] to stop, [?] for help
 [libx264 @ 0x55d65d3a4580] using cpu capabilities: MMX2 SSE2Fast SSSE3
 SSE4.2 AVX FMA3 BMI2 AVX2
 [libx264 @ 0x55d65d3a4580] profile High 4:4:4 Predictive, level 4.0, 4:4:4
 8-bit
 [libx264 @ 0x55d65d3a4580] 264 - core 155 r2917 0a84d98 - H.264/MPEG-4 AVC
 codec - Copyleft 2003-2018 - 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=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0
 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=24
 lookahead_threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0
 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1
 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25
 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0
 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
 Output #0, mp4, to 'out.mp4':
   Metadata:
     encoder         : Lavf58.20.100
     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p,
 1920x1080, q=-1--1, 25 fps, 12800 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.35.100 libx264
     Side data:
       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
 frame=  938 fps= 25 q=-1.0 Lsize=    1658kB time=00:00:37.40 bitrate=
 363.1kbits/s speed=0.991x
 video:1646kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.714329%
 [libx264 @ 0x55d65d3a4580] frame I:4     Avg QP: 9.87  size:248582
 [libx264 @ 0x55d65d3a4580] frame P:246   Avg QP:19.03  size:  2033
 [libx264 @ 0x55d65d3a4580] frame B:688   Avg QP:28.86  size:   277
 [libx264 @ 0x55d65d3a4580] consecutive B-frames:  1.4%  1.5%  2.9% 94.2%
 [libx264 @ 0x55d65d3a4580] mb I  I16..4: 73.5%  0.0% 26.5%
 [libx264 @ 0x55d65d3a4580] mb P  I16..4:  0.5%  0.0%  0.2%  P16..4:  0.6%
 0.1%  0.0%  0.0%  0.0%    skip:98.6%
 [libx264 @ 0x55d65d3a4580] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.2%
 0.0%  0.0%  direct: 0.0%  skip:98.7%  L0:56.9% L1:42.9% BI: 0.2%
 [libx264 @ 0x55d65d3a4580] coded y,u,v intra: 21.4% 16.0% 16.8% inter:
 0.0% 0.0% 0.0%
 [libx264 @ 0x55d65d3a4580] i16 v,h,dc,p: 75% 23%  2%  0%
 [libx264 @ 0x55d65d3a4580] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 34% 27% 19%  2%
 4%  3%  4%  2%  4%
 [libx264 @ 0x55d65d3a4580] Weighted P-Frames: Y:0.0% UV:0.0%
 [libx264 @ 0x55d65d3a4580] ref P L0: 30.9%  3.2% 40.4% 25.5%
 [libx264 @ 0x55d65d3a4580] ref B L0: 56.0% 37.6%  6.4%
 [libx264 @ 0x55d65d3a4580] ref B L1: 95.0%  5.0%
 [libx264 @ 0x55d65d3a4580] kb/s:359.23
 Exiting normally, received signal 2.
 houlei at houlei-PC:~/Desktop$


 -----------------------------------------------------------------------
 Hello, you can download the attached file: out.mp4 , open it with the
 player, and then observe the progress bar when playing. You will find that
 the progress bar is stuck, but the picture is still playing.



 Repeat steps:

 1.Play music in Linux system.
 2.On Linux platform, execute: ffmpeg -f x11grab -framerate 25 -video_size
 1920*1080 -i :0.0  out.mp4
 3.Adjust the volume of Linux system repeatedly
 4.Save the screen video
 5.Play the video and observe the progress bar.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/9090#comment:2>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker


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