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

dave at dericed.com dave at dericed.com
Tue Nov 29 16:30:27 EET 2016 

> On Nov 29, 2016, at 9:27 AM, Bayram Curcur <b.curcur at gmail.com> wrote:
> 
> 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

Perhaps you get daily mails with questions because you subscribed to a listserv that was created for the submission of questions about ffmpeg. Also if you have a question unrelated to this thread, please start a new thread.

> 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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