Question

使用此处的FFmpeg构建：https://github.com/illuspas/ffmpeg-hw-win32

gcc 5.3.0
--enable-nvenc nvidia_video_sdk_6.0.1
--enable-libmfx Intel(R)_Media_SDK_2016.0.1
--enable-libfdk-aac 0.1.4
--enable-libspeex 1.2rc1
--enable-libx264 1:148.20150725
--enable-libopenh264 1.5.0
--enable-libx265 1.8
--enable-libopus 1.1.2
--enable-libmp3lame 3.99.5
--enable-libkvazaar 0.8.2

./ configure --prefix = / home / aliang / FFmpeg / x86_64 --enable-small --disable-debug --disable-doc --arch = x86_64 --cc ='ccache x86_64-w64-mingw32- gcc'--cross-prefix = x86_64-w64-mingw32- --enable-cross-compile --target-os = mingw32 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libx264 --enable-libx265 --enable-libmfx --enable-nvenc --enable-libopenh264 --enable-libkvazaar --enable-gpl --enable-nonfree

我在MacBook Pro上运行Windows。我也尝试过更新的版本，并且输出相同。

输入视频来自sample-videos.com。

我正在运行的ffmpeg命令是：

ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4

sample-out-nvenc.mp4通过ffplay或vlc看起来像这样：

当我使用jpeg2抓取一个框架时，颜色显得正常，但高度会被压扁。

ffmpeg -y -ss 15.5 -i sample.mp4 -vframes 1 -s 480x300 -f image2 grab.jpg

输出的ffprobe结果（sample-out-nvenc.mp4）：

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample-out-nvenc.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.25.100
  Duration: 00:00:31.02, start: 0.021333, bitrate: 1994 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 1650 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 342 kb/s (default)
    Metadata:
      handler_name    : SoundHandler

最后是nvenc encoding命令的输出：

ffmpeg -y -i sample.mp4 -vcodec nvenc_h264 -pixel_format yuv420p -f mp4 sample-out-nvenc.mp4
ffmpeg version 3.0 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.3.0 (GCC)
  configuration: --prefix=/home/aliang/FFmpeg/x86_64 --enable-small --disable-debug --disable-doc --arch=x86_64 --cc='ccache x86_64-w64-mingw32-gcc' --cross-prefix=x86_64-w64-mingw32- --enable-cross-compile --target-os=mingw32 --enable-libfdk-aac --enable-libmp3lame --enable-libopus --enable-libspeex --enable-libx264 --enable-libx265 --enable-libmfx --enable-nvenc --enable-libopenh264 --enable-libkvazaar --enable-gpl --enable-nonfree
  libavutil      55. 17.103 / 55. 17.103
  libavcodec     57. 24.102 / 57. 24.102
  libavformat    57. 25.100 / 57. 25.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 31.100 /  6. 31.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sample.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    creation_time   : 1970-01-01 00:00:00
    encoder         : Lavf53.24.2
  Duration: 00:00:31.00, start: 0.000000, bitrate: 1353 kb/s
    Stream #0:0(und): Video: h264 (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 966 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler
Output #0, mp4, to 'sample-out-nvenc.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf57.25.100
    Stream #0:0(und): Video: h264 (nvenc_h264) ([33][0][0][0] / 0x0021), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 2000 kb/s, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : VideoHandler
      encoder         : Lavc57.24.102 nvenc_h264
    Side data:
      unknown side data type 10 (24 bytes)
    Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 48000 Hz, 5.1, fltp, 341 kb/s (default)
    Metadata:
      creation_time   : 1970-01-01 00:00:00
      handler_name    : SoundHandler
      encoder         : Lavc57.24.102 aac
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (nvenc_h264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
frame=  774 fps=253 q=-0.0 Lsize=    7551kB time=00:00:30.99 bitrate=1995.6kbits/s speed=10.1x
video:6236kB audio:1297kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.243011%
[aac @ 000001cdd9900520] Qavg: 743.457

Answer 1

我遇到了与GTX 980完全相同的问题。这是在安装驱动程序更新368.22之后开始的。我从nividia driver archive下载并恢复到驱动程序版本365.19，问题就消失了。

所以它似乎会影响所有的nvidia卡和驱动程序。

Answer 2

我通过另一个用例遇到了与nvenc相同的问题。它似乎是由最新的nvidia quadro驱动程序引起的。当我还原它时问题得到了解决。由于你有一个macbook，我觉得假设你没有一个四核卡是公平的，但它仍然可能是一个驱动程序问题。

使用NVENC的FFmpeg硬件加速产生半绿色输出视频

2 个答案: