[FFmpeg-user] XDcam MXF wrong field order

[Marton Balint]

On Tue, 18 May 2021, Bouke wrote:

>
> Trying to make broadcast compliant (XDcam style) MXF files, but those fail on wrong field order, if the source is progressive.
> This used to work fine. (ffmpeg version 3.2.2 has no issues with this, and has done literally thousands of good / compliant files)
>
> FFmpeg always reports "top coded first (swapped))", and MediaInfo says:
> Scan order                               : Bottom Field First
>
> If I swap out -top 1 for -field_order tt it does not help at all.
>
> Now, it ’should’ not be an issue, except that Baton / pre baton scripts bitch about it, and the files get rejected.

Well, you should try to bisect when it went wrong. Also have you tried the 
-vf setfield filter to force a field order? Maybe that helps?

Regards,
Marton

>
>
> Bouke
>
> Stripped down line: (To indicate the problem, this will not make a compliant file, I know.)
>
> /Applications/ffmpeg -i /Volumes/Data/17-05-2021_14-34-56_1.mov -c:v mpeg2video -b:v 50000k -maxrate 50000k -bufsize 3835k -minrate 50000k -r 25 -flags +ilme+ildct -top 1 -pix_fmt yuv422p -profile:v 0 -level:v 2 -t 1 /Volumes/Data/interlacetest.mxf -y 
>
> ffmpeg version 4.4-tessus  https://evermeet.cx/ffmpeg/  Copyright (c) 2000-2021 the FFmpeg developers
>  built with Apple clang version 11.0.0 (clang-1100.0.33.17)
>  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvmaf --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
>  libavutil      56. 70.100 / 56. 70.100
>  libavcodec     58.134.100 / 58.134.100
>  libavformat    58. 76.100 / 58. 76.100
>  libavdevice    58. 13.100 / 58. 13.100
>  libavfilter     7.110.100 /  7.110.100
>  libswscale      5.  9.100 /  5.  9.100
>  libswresample   3.  9.100 /  3.  9.100
>  libpostproc    55.  9.100 / 55.  9.100
> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/Data/17-05-2021_14-34-56_1.mov':
>  Metadata:
>    major_brand     : qt
>    minor_version   : 512
>    compatible_brands: qt
>    encoder         : Lavf58.65.101
>  Duration: 00:00:15.20, start: 0.000000, bitrate: 276385 kb/s
>  Stream #0:0: Video: prores (HQ) (apch / 0x68637061), yuv422p10le(tv, top coded first (swapped)), 1920x1080, 274850 kb/s, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
>    Metadata:
>      handler_name    : VideoHandler
>      vendor_id       : FFMP
>      encoder         : Lavc58.117.101 prores
>      timecode        : 12:34:59:00
>  Stream #0:1: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
>    Metadata:
>      handler_name    : SoundHandler
>      vendor_id       : [0][0][0][0]
>  Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
>    Metadata:
>      handler_name    : TimeCodeHandler
>      timecode        : 12:34:59:00
> Stream mapping:
>  Stream #0:0 -> #0:0 (prores (native) -> mpeg2video (native))
>  Stream #0:1 -> #0:1 (pcm_s16le (native) -> pcm_s16le (native))
> Press [q] to stop, [?] for help
> Output #0, mxf, to '/Volumes/Data/interlacetest.mxf':
>  Metadata:
>    major_brand     : qt
>    minor_version   : 512
>    compatible_brands: qt
>    encoder         : Lavf58.76.100
>  Stream #0:0: Video: mpeg2video (4:2:2), yuv422p(tv, progressive), 1920x1080, q=2-31, 50000 kb/s, 25 fps, 25 tbn (default)
>    Metadata:
>      handler_name    : VideoHandler
>      vendor_id       : FFMP
>      timecode        : 12:34:59:00
>      encoder         : Lavc58.134.100 mpeg2video
>    Side data:
>      cpb: bitrate max/min/avg: 50000000/50000000/50000000 buffer size: 3835000 vbv_delay: N/A
>  Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s (default)
>    Metadata:
>      handler_name    : SoundHandler
>      vendor_id       : [0][0][0][0]
>      encoder         : Lavc58.134.100 pcm_s16le
> frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:00.16 bitrate=   0.0kbits/sframe=   24 fps=0.0 q=2.0 size=    5632kB time=00:00:00.96 bitrate=48059.7kbits/frame=   25 fps=0.0 q=1.6 Lsize=    6216kB time=00:00:00.96 bitrate=53043.7kbits/s speed=1.79x 
> video:5986kB audio:188kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.681476%
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