[FFmpeg-user] setfield and display order and storage order

[Bayram Curcur]

Hi at all
could anyone explain me why i get daily mails with Questions? I ´ve a
question but i dont understand how its work

2016-11-29 15:23 GMT+01:00 <dave at dericed.com>:

>
> > On Nov 28, 2016, at 2:48 PM, dave at dericed.com wrote:
> >
> > Hi all,
> > I'm trying to use the setfield filter to get an output that is stored
> and display as top field first. However the output of setfield with bff and
> tff always seems to have a conflict between storage and display.
> >
> > For examples, using mandelbrot, tinterlace, and setfield to make a tff
> output.
> >
> > ffmpeg -f lavfi -i  mandelbrot=s=720x288:r=50/1 -vf
> tinterlace=merge,setfield=tff -t 1 -c:v v210 -y interlaced.mov
> > ffmpeg version N-43913-g801b5c1 Copyright (c) 2000-2016 the FFmpeg
> developers
> >  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
> >  configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-801b5c1
> --enable-shared --enable-pthreads --enable-gpl --enable-version3
> --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags=
> --host-ldflags= --enable-ffplay --enable-libfreetype --enable-libmp3lame
> --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma
> --enable-vda
> >  libavutil      55. 41.101 / 55. 41.101
> >  libavcodec     57. 66.108 / 57. 66.108
> >  libavformat    57. 58.101 / 57. 58.101
> >  libavdevice    57.  2.100 / 57.  2.100
> >  libavfilter     6. 67.100 /  6. 67.100
> >  libavresample   3.  2.  0 /  3.  2.  0
> >  libswscale      4.  3.101 /  4.  3.101
> >  libswresample   2.  4.100 /  2.  4.100
> >  libpostproc    54.  2.100 / 54.  2.100
> > Input #0, lavfi, from 'mandelbrot=s=720x288:r=50/1':
> >  Duration: N/A, start: 0.000000, bitrate: N/A
> >    Stream #0:0: Video: rawvideo (RGB[0] / 0x424752), rgb0, 720x288 [SAR
> 1:1 DAR 5:2], 50 tbr, 50 tbn, 50 tbc
> > Output #0, mov, to 'interlaced.mov':
> >  Metadata:
> >    encoder         : Lavf57.58.101
> >    Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p, 720x576 [SAR
> 2:1 DAR 5:2], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
> >    Metadata:
> >      encoder         : Lavc57.66.108 v210
> > Stream mapping:
> >  Stream #0:0 -> #0:0 (rawvideo (native) -> v210 (native))
> > Press [q] to stop, [?] for help
> > frame=   25 fps=0.0 q=-0.0 Lsize=   27001kB time=00:00:00.96
> bitrate=230388.8kbits/s speed=2.49x
> > video:27000kB audio:0kB subtitle:0kB other streams:0kB global
> headers:0kB muxing overhead: 0.003277%
> >
> > But the output is:
> >
> > ffmpeg -i interlaced.mov
> > ffmpeg version N-43913-g801b5c1 Copyright (c) 2000-2016 the FFmpeg
> developers
> >  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
> >  configuration: --prefix=/usr/local/Cellar/ffmpeg/HEAD-801b5c1
> --enable-shared --enable-pthreads --enable-gpl --enable-version3
> --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags=
> --host-ldflags= --enable-ffplay --enable-libfreetype --enable-libmp3lame
> --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma
> --enable-vda
> >  libavutil      55. 41.101 / 55. 41.101
> >  libavcodec     57. 66.108 / 57. 66.108
> >  libavformat    57. 58.101 / 57. 58.101
> >  libavdevice    57.  2.100 / 57.  2.100
> >  libavfilter     6. 67.100 /  6. 67.100
> >  libavresample   3.  2.  0 /  3.  2.  0
> >  libswscale      4.  3.101 /  4.  3.101
> >  libswresample   2.  4.100 /  2.  4.100
> >  libpostproc    54.  2.100 / 54.  2.100
> > Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'interlaced.mov':
> >  Metadata:
> >    major_brand     : qt
> >    minor_version   : 512
> >    compatible_brands: qt
> >    encoder         : Lavf57.58.101
> >  Duration: 00:00:01.00, start: 0.000000, bitrate: 221191 kb/s
> >    Stream #0:0(eng): Video: v210 (v210 / 0x30313276), yuv422p10le(top
> coded first (swapped)), 720x576, 221184 kb/s, SAR 2:1 DAR 5:2, 25 fps, 25
> tbr, 12800 tbn, 12800 tbc (default)
> >    Metadata:
> >      handler_name    : DataHandler
> >      encoder         : Lavc57.66.108 v210
> > At least one output file must be specified
> >
> > So the result is "top coded first (swapped)" aka "AV_FIELD_TB". Is this
> expected and is it possible to use the setfield filter (or another filter
> or argument) to get an output with AV_FIELD_TT? I get the same issue with
> mkv.
>
> I found that if I add '-field_order tt', then I can force a 'top first'
> output with mov, but an mkv output with '-field_order tt' stays as 'top
> coded first (swapped)'.
> Dave
>
>
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-- 
Mit freundlichen Grüßen

(Bayram Curcur)

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