[FFmpeg-trac] #2297(FFmpeg:new): benchmark only works if encoding is possible

[FFmpeg]

#2297: benchmark only works if encoding is possible
--------------------------------------+-----------------------------------
               Reporter:  cehoyos     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  FFmpeg
                Version:  git-master  |               Keywords:  benchmark
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+-----------------------------------
 The -benchmark option cannot be used to test the memory (and process time)
 requirement to probe the input file:
 {{{
 $ ffmpeg -benchmark -i tests/lena.pnm
 ffmpeg version N-50189-g239b88c Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Feb 22 2013 23:46:57 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 17.102 / 52. 17.102
   libavcodec     54. 92.100 / 54. 92.100
   libavformat    54. 63.100 / 54. 63.100
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 39.101 /  3. 39.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, image2, from 'tests/lena.pnm':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: ppm, rgb24, 256x256, 25 tbr, 25 tbn, 25 tbc
 At least one output file must be specified
 }}}
 {{{
 $ ffmpeg -benchmark -i tests/lena.pnm -f null -
 ffmpeg version N-50189-g239b88c Copyright (c) 2000-2013 the FFmpeg
 developers
   built on Feb 22 2013 23:46:57 with gcc 4.7 (SUSE Linux)
   configuration: --enable-gpl --disable-indev=jack
   libavutil      52. 17.102 / 52. 17.102
   libavcodec     54. 92.100 / 54. 92.100
   libavformat    54. 63.100 / 54. 63.100
   libavdevice    54.  3.103 / 54.  3.103
   libavfilter     3. 39.101 /  3. 39.101
   libswscale      2.  2.100 /  2.  2.100
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, image2, from 'tests/lena.pnm':
   Duration: 00:00:00.04, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: ppm, rgb24, 256x256, 25 tbr, 25 tbn, 25 tbc
 Output #0, null, to 'pipe:':
   Metadata:
     encoder         : Lavf54.63.100
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 256x256,
 q=2-31, 200 kb/s, 90k tbn, 25 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (ppm -> rawvideo)
 Press [q] to stop, [?] for help
 [null @ 0x2836ca0] Encoder did not produce proper pts, making some up.
 frame=    1 fps=0.0 q=0.0 Lsize=N/A time=00:00:00.04 bitrate=N/A
 video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead
 -122.916667%
 bench: utime=0.000s maxrss=4996kB
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2297>
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