FFMPEG 无法将 mov 转换为 flv

Question

我不熟悉的FFMPEG问题。似乎只发生在这个特定的文件中。任何人都有机会查看这个长期输出并就可能导致此问题的实际原因提供任何反馈？

ffmpeg_18.exe -i "E:\TESTFILES\115637.mov" -vcodec libx264 -b:v 700k -s 720x480 -r 29.97 -pix_fmt yuv420p -vf yadif -aspect 4:3 -acodec libvo_aacenc -b:a 96k -ar 44100 -f mp4 -y "E:\TESTFILES\test\115637.flv"
ffmpeg version N-39877-g4fa706a Copyright (c) 2000-2012 the FFmpeg developers
  built on Apr 16 2012 14:53:47 with gcc 4.6.3
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-li
bnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
  libavutil      51. 46.100 / 51. 46.100
  libavcodec     54. 14.101 / 54. 14.101
  libavformat    54.  3.100 / 54.  3.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 70.100 /  2. 70.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0. 11.100 /  0. 11.100
  libpostproc    52.  0.100 / 52.  0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'E:\TESTFILES\115637.mov':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2018-05-03 20:48:28
  Duration: 00:00:30.03, start: 0.000000, bitrate: 154663 kb/s
    Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 151585 kb/s, SAR 1920:1920 DAR 16:9, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc
    Metadata:
      creation_time   : 2018-05-03 20:48:28
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Audio: pcm_s16le (lpcm / 0x6D63706C), 48000 Hz, 4 channels, s16, 3072 kb/s
    Metadata:
      creation_time   : 2018-05-03 20:48:28
      handler_name    : Apple Alias Data Handler
    Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
    Metadata:
      creation_time   : 2018-05-03 20:51:29
      handler_name    : Apple Alias Data Handler
      timecode        : 00:00:00;00
[buffer @ 035c33a0] w:1920 h:1080 pixfmt:yuv420p tb:1/1000000 sar:1920/1920 sws_param:flags=2
[yadif @ 01e7caa0] mode:0 parity:-1 auto_enable:0
[scale @ 01e7c6a0] w:1920 h:1080 fmt:yuv420p sar:1920/1920 -> w:720 h:480 fmt:yuv420p sar:32/27 flags:0x4
[libx264 @ 035b8c40] using SAR=8/9
[libx264 @ 035b8c40] using cpu capabilities: MMX2 SSE2Fast SSSE3 FastShuffle SSE4.2 AVX FMA3
[libx264 @ 035b8c40] profile High, level 3.0
[libx264 @ 035b8c40] 264 - core 120 r2164 da19765 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,
11 fast_pskip=1 chroma_qp_offset=-2 threads=24 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitra
te=700 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[libvo_aacenc @ 01e7bae0] Unable to set encoding parameters
Output #0, mp4, to 'E:\TESTFILES\test\115637.flv':
  Metadata:
    major_brand     : qt
    minor_version   : 537199360
    compatible_brands: qt
    creation_time   : 2018-05-03 20:48:28
    Stream #0:0(eng): Video: h264, yuv420p, 720x480 [SAR 8:9 DAR 4:3], q=-1--1, 700 kb/s, 90k tbn, 29.97 tbc
    Metadata:
      creation_time   : 2018-05-03 20:48:28
      handler_name    : Apple Alias Data Handler
    Stream #0:1(eng): Audio: aac, 44100 Hz, 4 channels, s16, 96 kb/s
    Metadata:
      creation_time   : 2018-05-03 20:48:28
      handler_name    : Apple Alias Data Handler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> libx264)
  Stream #0:1 -> #0:1 (pcm_s16le -> libvo_aacenc)
Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

Answer 1

您的 ffmpeg真的老了

您可以在 Zeranoe 获取适用于 Windows 的最新版本。 .

libvo_aacenc 很糟糕

它已从 ffmpeg 中删除几年前。质量很差，不能处理超过 2 个 channel 。更新并改用内置 AAC 编码器:

ffmpeg -i input.mov -c:v libx264 -crf 23 -preset medium -vf "yadif,scale=-2:720,format=yuv420p" -c:a aac -ac 2 -b:a 96k output.flv

此示例使用 -ac 2 将您的 4 channel 输入缩混为 2 channel (立体声)。选项。

见 FFmpeg Wiki: H.264用于视频编码信息。