[FFmpeg-trac] #4057(ffprobe:new): ffprobe top_field_first shows zero on tff content

[FFmpeg]

#4057: ffprobe top_field_first shows zero on tff content
--------------------------------------+---------------------------------
               Reporter:  dericed     |                  Owner:
                   Type:  defect      |                 Status:  new
               Priority:  normal      |              Component:  ffprobe
                Version:  git-master  |               Keywords:
             Blocked By:              |               Blocking:
Reproduced by developer:  0           |  Analyzed by developer:  0
--------------------------------------+---------------------------------
 Summary of the bug:

 The values for frame:interlaced_frames and frame:top_field_frame always
 seem to be set to zero.

 If I generate a test file that is TFF via
 {{{
 ffmpeg -y -f lavfi -i mandelbrot -target ntsc-dv -t 0.5 -vf setfield=tff
 tff.mov
 ffmpeg version git-2014-10-25-80b29c2 Copyright (c) 2000-2014 the FFmpeg
 developers
   built on Oct 25 2014 11:44:58 with Apple LLVM version 6.0
 (clang-600.0.54) (based on LLVM 3.5svn)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
 --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree
 --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang
 --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-
 libmp3lame --enable-libxvid --enable-libfreetype --enable-libass --enable-
 ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
 cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
   libavutil      54. 11.100 / 54. 11.100
   libavcodec     56.  9.100 / 56.  9.100
   libavformat    56. 10.100 / 56. 10.100
   libavdevice    56.  1.100 / 56.  1.100
   libavfilter     5.  2.100 /  5.  2.100
   libavresample   2.  1.  0 /  2.  1.  0
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 Input #0, lavfi, from 'mandelbrot':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (RGBA / 0x41424752), rgba, 640x480 [SAR
 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Output #0, dv, to 'tff.mov':
   Metadata:
     encoder         : Lavf56.10.100
     Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3],
 q=2-31, 200 kb/s, 29.97 fps, 29.97 tbn, 29.97 tbc
     Metadata:
       encoder         : Lavc56.9.100 dvvideo
 Stream mapping:
   Stream #0:0 -> #0:0 (rawvideo (native) -> dvvideo (native))
 Press [q] to stop, [?] for help
 frame=   15 fps=0.0 q=0.0 Lsize=    1758kB time=00:00:00.50
 bitrate=28771.2kbits/s dup=2 drop=0
 video:1758kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.000000%
 }}}

 then mediainfo and ffmbc report the file as TFF, but in ffprobe all
 top_field_first equals 0.

 {{{
 ffprobe -f lavfi "movie=tff.mov" -show_entries
 frame=top_field_first,interlaced_frame
 ffprobe version git-2014-10-25-80b29c2 Copyright (c) 2007-2014 the FFmpeg
 developers
   built on Oct 25 2014 11:44:58 with Apple LLVM version 6.0
 (clang-600.0.54) (based on LLVM 3.5svn)
   configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD --enable-shared
 --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree
 --enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang
 --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-
 libmp3lame --enable-libxvid --enable-libfreetype --enable-libass --enable-
 ffplay --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-
 cflags='-I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
   libavutil      54. 11.100 / 54. 11.100
   libavcodec     56.  9.100 / 56.  9.100
   libavformat    56. 10.100 / 56. 10.100
   libavdevice    56.  1.100 / 56.  1.100
   libavfilter     5.  2.100 /  5.  2.100
   libavresample   2.  1.  0 /  2.  1.  0
   libswscale      3.  1.101 /  3.  1.101
   libswresample   1.  1.100 /  1.  1.100
   libpostproc    53.  3.100 / 53.  3.100
 [dv @ 0x7fafd181a200] Estimating duration from bitrate, this may be
 inaccurate
 Input #0, lavfi, from 'movie=tff.mov':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (Y41B / 0x42313459), yuv411p, 720x480
 [SAR 1:1 DAR 3:2], 29.97 tbr, 29.97 tbn, 29.97 tbc
 [FRAME]
 interlaced_frame=0
 top_field_first=0
 [/FRAME]
 [FRAME]
 interlaced_frame=0
 top_field_first=0
 [/FRAME]
 [ ... ]
 [FRAME]
 interlaced_frame=0
 top_field_first=0
 [/FRAME]
 }}}

 Note that I'm not looking for information from idet on what the
 interlacement or scan order 'looks' like but I am hoping to use
 top_field_first and interlaced_frame to decipher whether the codec or
 container reports the frame as. I tested a number of files and have not
 been able to ever get a 1 for top_field_first or interlaced_frame over a
 variety of codecs.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/4057>
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