[FFmpeg-trac] #4164(undetermined:new): x11grab (xcb) with show_region gives (partial) static image

[FFmpeg]

#4164: x11grab (xcb) with show_region gives (partial) static image
--------------------------------+----------------------------------------
             Reporter:  DiJuMx  |                    Owner:
                 Type:  defect  |                   Status:  new
             Priority:  normal  |                Component:  undetermined
              Version:  2.5     |               Resolution:
             Keywords:  xcb     |               Blocked By:
             Blocking:          |  Reproduced by developer:  0
Analyzed by developer:  0       |
--------------------------------+----------------------------------------

Comment (by cehoyos):

 I tested the following with xcb and the output file is not static:
 {{{
 $ ffmpeg -f x11grab -show_region 1 -i :0 -qscale 2 out.avi
 ffmpeg version N-68239-ga0d0799 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Dec  6 2014 00:41:32 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl
   libavutil      54. 15.100 / 54. 15.100
   libavcodec     56. 14.100 / 56. 14.100
   libavformat    56. 15.102 / 56. 15.102
   libavdevice    56.  3.100 / 56.  3.100
   libavfilter     5.  2.103 /  5.  2.103
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, x11grab, from ':0':
   Duration: N/A, start: 1417895763.578158, bitrate: N/A
     Stream #0:0: Video: rawvideo (BGRA / 0x41524742), bgra, 640x480, 29.97
 fps, 29.97 tbr, 1000k tbn, 29.97 tbc
 Please use -q:a or -q:v, -qscale is ambiguous
 Output #0, avi, to 'out.avi':
   Metadata:
     ISFT            : Lavf56.15.102
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 640x480,
 q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc56.14.100 mpeg4
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
 Press [q] to stop, [?] for help
 frame=   18 fps=0.0 q=2.0 size=     529kB time=00:00:01.10
 bitrate=3934.5kbits/s dup=0 drop=14
 frame=   33 fps= 33 q=2.0 size=     868kB time=00:00:01.60
 bitrate=4437.8kbits/s dup=0 drop=14
 frame=   48 fps= 32 q=2.0 size=    1165kB time=00:00:02.10
 bitrate=4541.6kbits/s dup=0 drop=14
 frame=   64 fps= 31 q=2.0 size=    1504kB time=00:00:02.63
 bitrate=4675.4kbits/s dup=0 drop=14
 frame=   79 fps= 31 q=2.0 size=    1802kB time=00:00:03.13
 bitrate=4707.0kbits/s dup=0 drop=14
 frame=   94 fps= 31 q=2.0 size=    2144kB time=00:00:03.63
 bitrate=4828.6kbits/s dup=0 drop=14
 frame=  109 fps= 31 q=2.0 size=    2645kB time=00:00:04.13
 bitrate=5236.1kbits/s dup=0 drop=14
 frame=  124 fps= 31 q=2.0 size=    2952kB time=00:00:04.63
 bitrate=5214.0kbits/s dup=0 drop=14
 frame=  140 fps= 31 q=2.0 size=    3254kB time=00:00:05.17
 bitrate=5154.8kbits/s dup=0 drop=14
 frame=  155 fps= 30 q=2.0 size=    3560kB time=00:00:05.67
 bitrate=5141.7kbits/s dup=0 drop=14
 frame=  170 fps= 30 q=2.0 size=    4067kB time=00:00:06.17
 bitrate=5397.0kbits/s dup=0 drop=14
 frame=  176 fps= 25 q=2.0 size=    4221kB time=00:00:07.44
 bitrate=4647.0kbits/s dup=0 drop=14
 frame=  194 fps= 26 q=2.0 size=    4728kB time=00:00:08.04
 bitrate=4816.1kbits/s dup=0 drop=46
 frame=  210 fps= 26 q=2.0 size=    5077kB time=00:00:08.57
 bitrate=4849.7kbits/s dup=0 drop=46
 frame=  222 fps= 26 q=2.0 Lsize=    5401kB time=00:00:08.97
 bitrate=4929.7kbits/s dup=0 drop=46
 video:5389kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.223046%
 }}}
 I don't have a Debian installation to test.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4164#comment:3>
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