[FFmpeg-trac] #1644(avfilter:new): vf select doesn't work with multiple images output

[FFmpeg]

#1644: vf select doesn't work with multiple images output
---------------------------------------+----------------------------------
               Reporter:  ubitux       |                  Owner:
                   Type:  defect       |                 Status:  new
               Priority:  normal       |              Component:  avfilter
                Version:  unspecified  |               Keywords:  select
             Blocked By:               |               Blocking:
Reproduced by developer:  1            |  Analyzed by developer:  0
---------------------------------------+----------------------------------
 {{{
 % ./ffmpeg -f lavfi -i testsrc -vf 'select=not(mod(n\,1000))' -frames:v 5
 out%d.png
 ffmpeg version N-43602-g569027e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug 16 2012 09:00:20 with gcc 4.7 (Debian 4.7.1-6)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --cc='ccache cc' --extra-cflags=-fstack-protector-all
 --enable-libx264 --enable-libvorbis --enable-libmodplug --enable-libass
 --samples=/home/cboesch/fate-samples
 --prefix=/home/cboesch/src/ff/ffmpeg/ffmpeg_build --enable-x11grab
 --enable-libvpx
   libavutil      51. 69.100 / 51. 69.100
   libavcodec     54. 53.100 / 54. 53.100
   libavformat    54. 24.100 / 54. 24.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  9.100 /  3.  9.100
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [lavfi @ 0x2f10260] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, image2, to 'out%d.png':
   Metadata:
     encoder         : Lavf54.24.100
     Stream #0:0: Video: png, rgb24, 320x240 [SAR 1:1 DAR 4:3], q=2-31, 200
 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo -> png)
 Press [q] to stop, [?] for help
 frame=    5 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.20 bitrate=
 0.0kbits/s dup=3 drop=0
 video:13kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 -100.000000%
 }}}

 Image 1 looks ok, but image 2 to 5 are identical; this is not correct.

 On the other hand, the output is correct with:

 {{{
 % ./ffmpeg -f lavfi -i testsrc -vf 'select=not(mod(n\,1000)),tile=5x1'
 -frames:v 1 out.png
 ffmpeg version N-43602-g569027e Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Aug 16 2012 09:00:20 with gcc 4.7 (Debian 4.7.1-6)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --cc='ccache cc' --extra-cflags=-fstack-protector-all
 --enable-libx264 --enable-libvorbis --enable-libmodplug --enable-libass
 --samples=/home/cboesch/fate-samples
 --prefix=/home/cboesch/src/ff/ffmpeg/ffmpeg_build --enable-x11grab
 --enable-libvpx
   libavutil      51. 69.100 / 51. 69.100
   libavcodec     54. 53.100 / 54. 53.100
   libavformat    54. 24.100 / 54. 24.100
   libavdevice    54.  2.100 / 54.  2.100
   libavfilter     3.  9.100 /  3.  9.100
   libswscale      2.  1.101 /  2.  1.101
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 [lavfi @ 0x1ec4260] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'testsrc':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, image2, to 'out.png':
   Metadata:
     encoder         : Lavf54.24.100
     Stream #0:0: Video: png, rgb24, 1600x240 [SAR 1:1 DAR 20:3], q=2-31,
 200 kb/s, 90k tbn, 5 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo -> png)
 Press [q] to stop, [?] for help
 frame=    1 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.20 bitrate=
 0.0kbits/s
 video:11kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 -100.000000%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1644>
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