[FFmpeg-trac] #6971(undetermined:new): ffmpeg drops frames after deinterlacing

[FFmpeg]

#6971: ffmpeg drops frames after deinterlacing
-------------------------------------+-------------------------------------
             Reporter:  CaryKnoop    |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:  cuvid        |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
-------------------------------------+-------------------------------------

Comment (by CaryKnoop):

 Full command line with console output:
 {{{
 ffmpeg -hwaccel cuvid -c:v mpeg2_cuvid -deint 2 -drop_second_field 0 -i
 touched.demuxed.m2v -c:v h264_nvenc -b:v 80M -profile:v high -preset slow
 out1.mp4
 ffmpeg version N-89825-g1b5d3c08e3 Copyright (c) 2000-2018 the FFmpeg
 developers
   built with gcc 7.2.0 (GCC)
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
 --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-
 libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
 --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr
 --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2
 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-
 libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa
 --enable-libspeex --enable-libmfx --enable-amf --enable-cuda --enable-
 cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth
   libavutil      56.  7.100 / 56.  7.100
   libavcodec     58.  9.100 / 58.  9.100
   libavformat    58.  5.100 / 58.  5.100
   libavdevice    58.  0.100 / 58.  0.100
   libavfilter     7. 11.101 /  7. 11.101
   libswscale      5.  0.101 /  5.  0.101
   libswresample   3.  0.101 /  3.  0.101
   libpostproc    55.  0.100 / 55.  0.100
 Input #0, mpegvideo, from 'touched.demuxed.m2v':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: mpeg2video (Main), yuv420p(tv, smpte170m, top
 first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 1200k tbn, 59.94
 tbc
 Stream mapping:
   Stream #0:0 -> #0:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
 Press [q] to stop, [?] for help
 Output #0, mp4, to 'out1.mp4':
   Metadata:
     encoder         : Lavf58.5.100
     Stream #0:0: Video: h264 (h264_nvenc) (High) (avc1 / 0x31637661),
 cuda, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 80000 kb/s, 29.97 fps, 30k tbn,
 29.97 tbc
     Metadata:
       encoder         : Lavc58.9.100 h264_nvenc
     Side data:
       cpb: bitrate max/min/avg: 0/0/80000000 buffer size: 160000000
 vbv_delay: -1
 Past duration 0.999992 too large
 frame= 4362 fps=1068 q=12.0 Lsize=  122530kB time=00:02:25.51
 bitrate=6898.1kbits/s dup=18 drop=4338 speed=35.6x
 video:122510kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.015960%
 }}}

--
Ticket URL: <https://trac.ffmpeg.org/ticket/6971#comment:2>
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