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ffmpeg - ffmpeg：视频参数与DNxHD不兼容

问题描述

我正在尝试转换mp4为mov，但是ffmpeg视频转换存在问题：

  Stream #0:0 -> #0:0 (h264 (native) -> dnxhd (native))

我已经尝试了几个建议的配置但没有成功：

知道有什么问题吗？如何选择“正确”的视频格式？

相机旋转 90° 时是否有可能ffmpeg拒绝转换视频？即输入分辨率是1080x1920？

ffmpeg -i google-2020/VID-20200421-WA0000.mp4 -map_metadata 0 -vcodec dnxhd -acodec pcm_s16le -pix_fmt yuv422p10 -r 24000/1001 -b:v 175M google-2020-conv2/VID-20200421-WA0000.mov
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'google-2020/VID-20200421-WA0000.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2020-04-26T12:06:16.000000Z
  Duration: 00:00:12.98, start: 0.000000, bitrate: 720 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m/bt470bg/bt709), 640x352 [SAR 1:1 DAR 20:11], 592 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      creation_time   : 2020-04-26T12:06:16.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 04/26/2020.
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      creation_time   : 2020-04-26T12:06:16.000000Z
      handler_name    : ISO Media file produced by Google Inc. Created on: 04/26/2020.
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> dnxhd (native))
  Stream #0:1 -> #0:1 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
[dnxhd @ 0x55b24eeae0a0] video parameters incompatible with DNxHD. Valid DNxHD profiles:
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 175Mbps; pixel format: yuv422p10; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 185Mbps; pixel format: yuv422p10; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 365Mbps; pixel format: yuv422p10; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 440Mbps; pixel format: yuv422p10; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 115Mbps; pixel format: yuv422p; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 120Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 145Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 240Mbps; pixel format: yuv422p; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 290Mbps; pixel format: yuv422p; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 175Mbps; pixel format: yuv422p; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 185Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 220Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 365Mbps; pixel format: yuv422p; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 440Mbps; pixel format: yuv422p; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 185Mbps; pixel format: yuv422p10; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 220Mbps; pixel format: yuv422p10; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 120Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 145Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 185Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080i; bitrate: 220Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 120Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 145Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 90Mbps; pixel format: yuv422p10; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 90Mbps; pixel format: yuv422p10; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 180Mbps; pixel format: yuv422p10; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 220Mbps; pixel format: yuv422p10; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 90Mbps; pixel format: yuv422p; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 90Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 110Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 180Mbps; pixel format: yuv422p; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 220Mbps; pixel format: yuv422p; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 60Mbps; pixel format: yuv422p; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 60Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 75Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 120Mbps; pixel format: yuv422p; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1280x720p; bitrate: 145Mbps; pixel format: yuv422p; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 36Mbps; pixel format: yuv422p; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 36Mbps; pixel format: yuv422p; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 45Mbps; pixel format: yuv422p; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 75Mbps; pixel format: yuv422p; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 90Mbps; pixel format: yuv422p; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 350Mbps; pixel format: yuv422p10; framerate: 24000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 390Mbps; pixel format: yuv422p10; framerate: 25/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 440Mbps; pixel format: yuv422p10; framerate: 30000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 730Mbps; pixel format: yuv422p10; framerate: 50/1
[dnxhd @ 0x55b24eeae0a0] Frame size: 1920x1080p; bitrate: 880Mbps; pixel format: yuv422p10; framerate: 60000/1001
[dnxhd @ 0x55b24eeae0a0] Frame size: 960x720p; bitrate: 42Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 960x720p; bitrate: 60Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 960x720p; bitrate: 75Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 960x720p; bitrate: 115Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080p; bitrate: 63Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080p; bitrate: 84Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080p; bitrate: 100Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080p; bitrate: 110Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 80Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 90Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 100Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24eeae0a0] Frame size: 1440x1080i; bitrate: 110Mbps; pixel format: yuv422p; framerate: 0/0
[dnxhd @ 0x55b24ea11a60] ff_frame_thread_encoder_init failed
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!

标签： ffmpegmp4quicktime

解决方案

知道有什么问题吗？如何选择“正确”的视频格式？

DNxHD 有特定的要求。你必须选择一个正确的：

  • 宽x高
  • 比特率
  • 像素格式
  • 帧率

您的命令缺少可接受的宽度 x 高度。您的输入是 640x352，但 DNxHD 需要 720p 或更大。请参阅问题输出中的有效DNxHD 配置文件。ffmpeg

对于 640x352 的输入，我想知道 DNxHD 是否是正确的选择。为什么需要 DNxHD？可能是 XY 问题。

相机旋转 90° 时是否有可能ffmpeg拒绝转换视频？即输入分辨率是1080x1920？

我在您的文件信息中没有看到轮换元数据/sidedata。ffmpeg编码时会自动旋转，除非你告诉它不要 with -noautorotate。

如果它旋转到 1080x1920，那么它将是无效的，因为它没有在您的问题输出的有效 DNxHD 配置文件中明确列出。ffmpeg

例子

与您的输入相匹配的最接近接受的个人资料是：

Frame size: 1280x720p; bitrate: 110Mbps; pixel format: yuv422p; framerate: 30000/1001

命令：

ffmpeg -i input.mp4 -vf "fps=30000/1001,scale=1280:720:force_original_aspect_ratio=increase,crop=1280:720,setsar=1,format=yuv422p" -c:v dnxhd -b:v 110M -c:a pcm_s16le output.mov

比例和填充过滤器示例来自Resizing videos with ffmpegto fit into specific size。如果您更喜欢 pad-to-fit（信箱/邮筒）而不是crop-to-fit，请参阅此链接以获取更多示例。

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