我正在尝试将mov文件转换为H264编码的mp4 相同的命令可以很好地转换另一个mov文件。
但是对于特定的mov文件失败了。转换后原始视频为29.6MB我得到966KB
我的声音和持续时间正确。但即使原始视频很好，所有画面都是黑色的。
这是命令：
ffmpeg -i file3.mov -movflags +faststart -vcodec libx264 -preset slow -crf 20 -vf -threads 0 -acodec libvo_aacenc -b:a 128k "file3.mp4"
以下是ffmpeg -i：＆gt; ffmpeg.exe -i file3.mov
的结果ffmpeg version N-54691-g7f4a1fd Copyright (c) 2000-2013 the FFmpeg developers
built on Jul 12 2013 16:31:48 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
libavutil 52. 39.100 / 52. 39.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.102 / 55. 12.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 80.101 / 3. 80.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000003077e0] sample aspect ratio already set to
118:81, ignoring 'pasp' atom (10000:7031)
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file3.mov':
Metadata:
creation_time : 2009-02-12 01:19:22
Duration: 00:00:08.00, start: 0.000000, bitrate: 30338 kb/s
Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), yuv411p, 720x576 [SAR
64:45 DAR 16:9], 28800 kb/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 600 tbn, 25
tbc
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s1
6, 1536 kb/s
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
在转换过程中，这是我看到的（没有异常或没有错误）：
ffmpeg version N-54691-g7f4a1fd Copyright (c) 2000-2013 the FFmpeg developers
built on Jul 12 2013 16:31:48 with gcc 4.7.3 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av
isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab
le-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetyp
e --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --ena
ble-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-l
ibopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libsp
eex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-
amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --
enable-libxvid --enable-zlib
libavutil 52. 39.100 / 52. 39.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.102 / 55. 12.102
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 80.101 / 3. 80.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 00000000024aafe0] sample aspect ratio already set to
118:81, ignoring 'pasp' atom (10000:7031)
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'file3.mov':
Metadata:
creation_time : 2009-02-12 01:19:22
Duration: 00:00:08.00, start: 0.000000, bitrate: 30338 kb/s
Stream #0:0(eng): Video: dvvideo (dvpp / 0x70707664), yuv411p, 720x576 [SAR
64:45 DAR 16:9], 28800 kb/s, SAR 118:81 DAR 295:162, 25 fps, 25 tbr, 600 tbn, 25
tbc
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, stereo, s1
6, 1536 kb/s
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
No pixel format specified, yuv422p for H.264 encoding chosen.
Use -pix_fmt yuv420p for compatibility with outdated media players.
[libx264 @ 0000000000347340] using SAR=118/81
[libx264 @ 0000000000347340] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2
AVX
[libx264 @ 0000000000347340] profile High 4:2:2, level 2.1, 4:2:2 8-bit
[libx264 @ 0000000000347340] 264 - core 133 r2334 a3ac64b - H.264/MPEG-4 AVC cod
ec - Copyleft 2003-2013 - http://www.videolan.org/x264.html - options: cabac=1 r
ef=5 deblock=1:0:0 analyse=0x3:0x113 me=umh subme=8 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_pski
p=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 deci
mate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_
adapt=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=2
5 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=20.0 qcomp=0.6
0 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'file4a.mp4':
Metadata:
encoder : Lavf55.12.102
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv422p, 4
80x320 [SAR 118:81 DAR 59:27], q=-1--1, 12800 tbn, 25 tbc
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
Stream #0:1(eng): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000
Hz, stereo, s16, 128 kb/s
Metadata:
creation_time : 2009-02-12 01:19:22
handler_name : Apple Alias Data Handler
Stream mapping:
Stream #0:0 -> #0:0 (dvvideo -> libx264)
Stream #0:1 -> #0:1 (pcm_s16be -> libvo_aacenc)
Press [q] to stop, [?] for help
[swscaler @ 00000000024b0740] Warning: data is not aligned! This can lead to a s
peedloss
frame= 78 fps=0.0 q=25.0 size= 128kB time=00:00:02.14 bitrate= 487.8kbits/
frame= 113 fps=109 q=25.0 size= 272kB time=00:00:04.27 bitrate= 520.9kbits/
frame= 145 fps= 94 q=25.0 size= 399kB time=00:00:05.36 bitrate= 609.2kbits/
frame= 182 fps= 89 q=25.0 size= 571kB time=00:00:06.45 bitrate= 725.0kbits/
Starting second pass: moving header on top of the file
frame= 200 fps= 70 q=-1.0 Lsize= 965kB time=00:00:08.00 bitrate= 987.2kbits
/s
video:832kB audio:126kB subtitle:0 global headers:0kB muxing overhead 0.755121%
[libx264 @ 0000000000347340] frame I:1 Avg QP:21.14 size: 39885
[libx264 @ 0000000000347340] frame P:50 Avg QP:21.80 size: 7412
[libx264 @ 0000000000347340] frame B:149 Avg QP:26.25 size: 2960
[libx264 @ 0000000000347340] consecutive B-frames: 0.5% 0.0% 1.5% 98.0%
[libx264 @ 0000000000347340] mb I I16..4: 13.7% 46.7% 39.7%
[libx264 @ 0000000000347340] mb P I16..4: 0.5% 19.7% 3.8% P16..4: 32.8% 11.9
% 14.1% 0.0% 0.0% skip:17.1%
[libx264 @ 0000000000347340] mb B I16..4: 0.0% 5.1% 1.3% B16..8: 14.4% 9.2
% 2.9% direct: 7.3% skip:59.8% L0:42.8% L1:38.3% BI:19.0%
[libx264 @ 0000000000347340] 8x8 transform intra:79.4% inter:71.7%
[libx264 @ 0000000000347340] direct mvs spatial:97.3% temporal:2.7%
[libx264 @ 0000000000347340] coded y,uvDC,uvAC intra: 92.8% 80.1% 26.3% inter: 2
4.2% 28.8% 8.1%
[libx264 @ 0000000000347340] i16 v,h,dc,p: 64% 17% 3% 16%
[libx264 @ 0000000000347340] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 1% 33% 4% 3% 8%
2% 35% 2% 11%
[libx264 @ 0000000000347340] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 3% 23% 5% 4% 11%
5% 33% 4% 13%
[libx264 @ 0000000000347340] i8c dc,h,v,p: 38% 40% 14% 8%
[libx264 @ 0000000000347340] Weighted P-Frames: Y:2.0% UV:0.0%
[libx264 @ 0000000000347340] ref P L0: 39.9% 10.0% 25.6% 8.7% 15.3% 0.6%
[libx264 @ 0000000000347340] ref B L0: 76.9% 15.1% 5.7% 2.3%
[libx264 @ 0000000000347340] ref B L1: 96.3% 3.7%
[libx264 @ 0000000000347340] kb/s:851.49