[FFmpeg-trac] #2012(FFmpeg:new): -filter without specifier fails without explicit error

[FFmpeg]

#2012: -filter without specifier fails without explicit error
--------------------------------------+--------------------------------
               Reporter:  ubitux      |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  FFmpeg
                Version:  git-master  |               Keywords:
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+--------------------------------
 Given a random input file with both audio and video:

 {{{
 ☭ ./ffmpeg -f lavfi -i 'testsrc[out0]; aevalsrc=sin(2*PI*t*440)[out1]' -t
 5 -y test.avi
 ffmpeg version N-47714-g7eafd27 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec 11 2012 03:04:42 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264
 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg
 --enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc
 --samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-
 runtime-cpudetect --enable-libcelt
   libavutil      52. 12.100 / 52. 12.100
   libavcodec     54. 79.101 / 54. 79.101
   libavformat    54. 49.101 / 54. 49.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 26.101 /  3. 26.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 [lavfi @ 0x2a3b260] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'testsrc[out0]; aevalsrc=sin(2*PI*t*440)[out1]':
   Duration: N/A, start: 0.000000, bitrate: 2822 kb/s
     Stream #0:0: Video: rawvideo (RGB[24] / 0x18424752), rgb24, 320x240
 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
     Stream #0:1: Audio: pcm_f64le, 44100 Hz, mono, dbl, 2822 kb/s
 Output #0, avi, to 'test.avi':
   Metadata:
     ISFT            : Lavf54.49.101
     Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p, 320x240 [SAR
 1:1 DAR 4:3], q=2-31, 200 kb/s, 25 tbn, 25 tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, s32p
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo -> mpeg4)
   Stream #0:1 -> #0:1 (pcm_f64le -> libmp3lame)
 Press [q] to stop, [?] for help
 frame=  125 fps=0.0 q=2.0 Lsize=     256kB time=00:00:05.01 bitrate=
 418.1kbits/s
 video:199kB audio:39kB subtitle:0 global headers:0kB muxing overhead
 7.317413%
 }}}

 ...and trying the following commands fail:

 {{{
 ☭ ./ffmpeg -i test.avi -filter edgedetect -f null -
 ffmpeg version N-47714-g7eafd27 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec 11 2012 03:04:42 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264
 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg
 --enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc
 --samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-
 runtime-cpudetect --enable-libcelt
   libavutil      52. 12.100 / 52. 12.100
   libavcodec     54. 79.101 / 54. 79.101
   libavformat    54. 49.101 / 54. 49.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 26.101 /  3. 26.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, avi, from 'test.avi':
   Metadata:
     encoder         : Lavf54.49.101
   Duration: 00:00:05.04, start: 0.000000, bitrate: 415 kb/s
     Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, s16p,
 64 kb/s
 [buffer @ 0x178f040] Unable to parse option value "0x0" as image size
 Error opening filters!
 }}}

 {{{
 ☭ ./ffmpeg -i test.avi -filter volume -f null -
 ffmpeg version N-47714-g7eafd27 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Dec 11 2012 03:04:42 with gcc 4.7.2 (GCC)
   configuration: --enable-gpl --enable-fontconfig --enable-libfreetype
 --enable-libmp3lame --enable-libvorbis --enable-libxvid --enable-libx264
 --enable-libvpx --enable-libtheora --enable-x11grab --enable-libopenjpeg
 --enable-libass --enable-libmodplug --enable-libv4l2 --cc=colorgcc
 --samples=/home/ubitux/fate-samples --prefix=/tmp/ffinstall --enable-
 runtime-cpudetect --enable-libcelt
   libavutil      52. 12.100 / 52. 12.100
   libavcodec     54. 79.101 / 54. 79.101
   libavformat    54. 49.101 / 54. 49.101
   libavdevice    54.  3.102 / 54.  3.102
   libavfilter     3. 26.101 /  3. 26.101
   libswscale      2.  1.103 /  2.  1.103
   libswresample   0. 17.102 /  0. 17.102
   libpostproc    52.  2.100 / 52.  2.100
 Input #0, avi, from 'test.avi':
   Metadata:
     encoder         : Lavf54.49.101
   Duration: 00:00:05.04, start: 0.000000, bitrate: 415 kb/s
     Stream #0:0: Video: mpeg4 (Simple Profile) (FMP4 / 0x34504D46),
 yuv420p, 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
     Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 44100 Hz, mono, s16p,
 64 kb/s
 [abuffer @ 0x1e057e0] Value inf for parameter 'time_base' out of range [0
 - 2.14748e+09]
 Error opening filters!
 }}}

 It works fine when using {{{-filter:v}}} or {{{-vf}}}, and {{{-filter:a}}}
 or {{{-af}}} though.

 We should either fail with a more explicit error when the type specifier
 is not set, or have better heuristics to guess what the user wants.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2012>
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