当我从命令行运行FFMpeg时，就像这样
ffmpeg.exe -hwaccel auto -re -i "C:\Users\Public\Videos\Sample Videos\Wildlife.wmv" -an -sn -c:v bmp -pix_fmt bgr24 -f rawvideo - > junk.bin
它工作正常。但是，当我产生完全相同的东西（减去> junk.bin）时，我会在几秒钟的播放后得到这个令人讨厌的“坏标题”错误。是什么造成的？我很难相信我的进程阻塞管道比文件系统更长，但它应该能够无限制地阻塞管道而不会破坏解码。截断的stderr在下面。我生成该东西的代码是here。
ffmpeg version N-60761-g916a792 Copyright (c) 2000-2014 the FFmpeg developers
built on Feb 19 2014 21:57:22 with gcc 4.8.2 (GCC)
configuration: --target-os=mingw32 --enable-shared --enable-runtime-cpudetect
libavutil 52. 65.100 / 52. 65.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 1.103 / 4. 1.103
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
cygwin warning:
MS-DOS style path detected: C:\Users\Public\Videos\Sample Videos\Wildlife.wmv
Preferred POSIX equivalent is: /cygdrive/c/Users/Public/Videos/Sample Videos/Wildlife.wmv
CYGWIN environment variable option "nodosfilewarning" turns off this warning.
Consult the user's guide for more details about POSIX paths:
http://cygwin.com/cygwin-ug-net/using.html#using-pathnames
[asf @ 0x600059480] Stream #0: not enough frames to estimate rate; consider increasing probesize
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, asf, from 'C:\Users\Public\Videos\Sample Videos\Wildlife.wmv':
Metadata:
SfOriginalFPS : 299700
WMFSDKVersion : 11.0.6001.7000
WMFSDKNeeded : 0.0.0.0000
comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
title : Wildlife in HD
copyright : © 2008 Microsoft Corporation
IsVBR : 0
DeviceConformanceTemplate: AP@L3
Duration: 00:00:30.09, start: 0.000000, bitrate: 6977 kb/s
Stream #0:0(eng): Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 192 kb/s
Stream #0:1(eng): Video: vc1 (Advanced) (WVC1 / 0x31435657), yuv420p, 1280x720, 5942 kb/s, 29.97 tbr, 1k tbn, 1k tbc
Output #0, rawvideo, to 'pipe:':
Metadata:
SfOriginalFPS : 299700
WMFSDKVersion : 11.0.6001.7000
WMFSDKNeeded : 0.0.0.0000
comment : Footage: Small World Productions, Inc; Tourism New Zealand | Producer: Gary F. Spradling | Music: Steve Ball
title : Wildlife in HD
copyright : © 2008 Microsoft Corporation
IsVBR : 0
DeviceConformanceTemplate: AP@L3
encoder : Lavf55.33.100
Stream #0:0(eng): Video: bmp, bgr24, 1280x720, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
Stream mapping:
Stream #0:1 -> #0:0 (vc1 -> bmp)
Press [q] to stop, [?] for help
frame= 3 fps=0.0 q=0.0 size= 8100kB time=00:00:00.10 bitrate=662902.1kbits/s
frame= 29 fps= 26 q=0.0 size= 78302kB time=00:00:00.96 bitrate=662902.3kbits/s
frame= 50 fps= 30 q=0.0 size= 135003kB time=00:00:01.66 bitrate=662902.2kbits/s
frame= 65 fps= 30 q=0.0 size= 175503kB time=00:00:02.16 bitrate=662902.2kbits/s
frame= 80 fps= 30 q=0.0 size= 216004kB time=00:00:02.66 bitrate=662902.1kbits/s
frame= 95 fps= 30 q=0.0 size= 256505kB time=00:00:03.16 bitrate=662902.1kbits/s
[asf @ 0x600059480] ff asf bad header 74 at:5053733
[asf @ 0x600059480] invalid packet_length -1908511255 at:5053740
[asf @ 0x600059480] ff asf bad header d4 at:5053759
[asf @ 0x600059480] ff asf skip 55629 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5181733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5189733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5197733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5205733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5213733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5221733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5229733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5237733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5245733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5357733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5365733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5373733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5381733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5493733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5501733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5509733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5517733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5629733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5637733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5645733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5653733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5701733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5709733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5717733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5725733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5805733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5813733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5821733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5829733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5877733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5885733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5893733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5901733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5949733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5957733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5965733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] ff asf bad header 0 at:5973733
[asf @ 0x600059480] ff asf skip 7991 (unknown stream)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 15 times
[asf @ 0x600059480] unexpected packet_replic_size of 2
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 7 times
[asf @ 0x600059480] ff asf skip 2562 (unknown stream)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 3 times
[asf @ 0x600059480] ff asf skip 448 (unknown stream)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 9 times
[asf @ 0x600059480] unexpected packet_replic_size of 6
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 7 times
[asf @ 0x600059480] packet_frag_size is invalid (1749-9)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 13 times
[asf @ 0x600059480] packet_frag_size is invalid (1749-9)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 24 times
[asf @ 0x600059480] unexpected packet_replic_size of 6
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 6 times
[asf @ 0x600059480] unexpected packet_replic_size of 5
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 6 times
[asf @ 0x600059480] packet_frag_size is invalid (1749-9)
[asf @ 0x600059480] packet_obj_size invalid
[asf @ 0x600059480] packet_frag_size is invalid (1749-9)
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 2 times
[asf @ 0x600059480] unexpected packet_replic_size of 5
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 8 times
[asf @ 0x600059480] unexpected packet_replic_size of 5
[asf @ 0x600059480] packet_obj_size invalid
Last message repeated 39 times
[asf @ 0x600059480] packet_frag_size is invalid (1749-40)
答案 0 :(得分：0)
尝试删除-re选项。它告诉ffmpeg read from the input at the native framerate，并且硬盘，ffmpeg和输出捕获程序之间可能存在一些同步或瓶颈问题。
由于您的输入存储在本地磁盘上，因此似乎没有任何理由不能正常读取文件。