Ffmpeg avformat_open_输入仅在自定义IO上下文中失败

avformat_open_输入遇到异常问题，它在以下方面失败：

处理输入时发现无效数据

但只有当我尝试使用自定义的

AVIOContext

读取文件时，才会发生这种情况

我的自定义代码如下（为了清楚起见，省略了错误检查）：

正在读取的数据是从磁盘上的文件加载的：

/tmp/25.jpeg

以下代码能够正确打开和提取图像：

auto fmtCtx = avformat_alloc_context();
int err = avformat_open_input(&fmtCtx, "/tmp/25.jpeg", NULL, NULL);

该项目使用的是精简版的

libavformat

，只包括我们需要的格式。我不认为这是问题的原因，因为当指定路径时，文件可以被正确打开和处理。我没有看到任何专门针对自定义IO上下文支持的

配置
选项

这就是问题中的图像：
问题是由我编译的
ffmpeg
带有自定义配置脚本试图禁用我不使用的所有格式引起的

如果我没记错的话，缺少的配置标志是
--enable protocol=pipe

这是
configure
的参数列表，我使用该参数仅启用我的应用程序感兴趣的音频和图像文件格式，从而创建精简的
ffmpeg
构建：

--disable-doc
--disable-debug
--disable-avdevice
--enable-swscale
--enable-rdft
--disable-ffmpeg
--disable-ffplay
--disable-ffprobe
--disable-ffserver
--disable-network
--disable-muxers
--disable-demuxers
--disable-zlib
--disable-bzlib
--disable-iconv
--disable-bsfs
--disable-filters
--disable-parsers
--disable-indevs
--disable-outdevs
--disable-encoders
--disable-decoders
--disable-hwaccels
--disable-nvenc
--disable-xvmc
--disable-videotoolbox
--disable-audiotoolbox
--disable-libxcb
--disable-network
--disable-sdl2
--disable-securetransport
--disable-xlib
--disable-filters
--enable-filter=aformat
--enable-filter=anull
--enable-filter=atrim
--enable-filter=format
--enable-filter=null
--enable-filter=setpts
--enable-filter=trim
--disable-protocols
--enable-protocol=file
--enable-protocol=pipe
--enable-demuxer=image2
--enable-demuxer=aac
--enable-demuxer=ac3
--enable-demuxer=aiff
--enable-demuxer=ape
--enable-demuxer=asf
--enable-demuxer=au
--enable-demuxer=avi
--enable-demuxer=flac
--enable-demuxer=flv
--enable-demuxer=matroska
--enable-demuxer=mov
--enable-demuxer=m4v
--enable-demuxer=mp3
--enable-demuxer=mpc
--enable-demuxer=mpc8
--enable-demuxer=ogg
--enable-demuxer=pcm_alaw
--enable-demuxer=pcm_mulaw
--enable-demuxer=pcm_f64be
--enable-demuxer=pcm_f64le
--enable-demuxer=pcm_f32be
--enable-demuxer=pcm_f32le
--enable-demuxer=pcm_s32be
--enable-demuxer=pcm_s32le
--enable-demuxer=pcm_s24be
--enable-demuxer=pcm_s24le
--enable-demuxer=pcm_s16be
--enable-demuxer=pcm_s16le
--enable-demuxer=pcm_s8
--enable-demuxer=pcm_u32be
--enable-demuxer=pcm_u32le
--enable-demuxer=pcm_u24be
--enable-demuxer=pcm_u24le
--enable-demuxer=pcm_u16be
--enable-demuxer=pcm_u16le
--enable-demuxer=pcm_u8
--enable-demuxer=rm
--enable-demuxer=shorten
--enable-demuxer=tak
--enable-demuxer=tta
--enable-demuxer=wav
--enable-demuxer=wv
--enable-demuxer=xwma
--enable-demuxer=dsf
--enable-decoder=aac
--enable-decoder=aac_latm
--enable-decoder=ac3
--enable-decoder=alac
--enable-decoder=als
--enable-decoder=ape
--enable-decoder=atrac1
--enable-decoder=atrac3
--enable-decoder=eac3
--enable-decoder=flac
--enable-decoder=gsm
--enable-decoder=gsm_ms
--enable-decoder=mp1
--enable-decoder=mp1float
--enable-decoder=mp2
--enable-decoder=mp2float
--enable-decoder=mp3
--enable-decoder=mp3adu
--enable-decoder=mp3adufloat
--enable-decoder=mp3float
--enable-decoder=mp3on4
--enable-decoder=mp3on4float
--enable-decoder=mpc7
--enable-decoder=mpc8
--enable-decoder=opus
--enable-decoder=ra_144
--enable-decoder=ra_288
--enable-decoder=ralf
--enable-decoder=shorten
--enable-decoder=tak
--enable-decoder=tta
--enable-decoder=vorbis
--enable-decoder=wavpack
--enable-decoder=wmalossless
--enable-decoder=wmapro
--enable-decoder=wmav1
--enable-decoder=wmav2
--enable-decoder=wmavoice
--enable-decoder=pcm_alaw
--enable-decoder=pcm_bluray
--enable-decoder=pcm_dvd
--enable-decoder=pcm_f32be
--enable-decoder=pcm_f32le
--enable-decoder=pcm_f64be
--enable-decoder=pcm_f64le
--enable-decoder=pcm_lxf
--enable-decoder=pcm_mulaw
--enable-decoder=pcm_s8
--enable-decoder=pcm_s8_planar
--enable-decoder=pcm_s16be
--enable-decoder=pcm_s16be_planar
--enable-decoder=pcm_s16le
--enable-decoder=pcm_s16le_planar
--enable-decoder=pcm_s24be
--enable-decoder=pcm_s24daud
--enable-decoder=pcm_s24le
--enable-decoder=pcm_s24le_planar
--enable-decoder=pcm_s32be
--enable-decoder=pcm_s32le
--enable-decoder=pcm_s32le_planar
--enable-decoder=pcm_u8
--enable-decoder=pcm_u16be
--enable-decoder=pcm_u16le
--enable-decoder=pcm_u24be
--enable-decoder=pcm_u24le
--enable-decoder=pcm_u32be
--enable-decoder=pcm_u32le
--enable-decoder=pcm_zork
--enable-decoder=dsd_lsbf
--enable-decoder=dsd_msbf
--enable-decoder=dsd_lsbf_planar
--enable-decoder=dsd_msbf_planar
--enable-parser=aac
--enable-parser=aac_latm
--enable-parser=ac3
--enable-parser=cook
--enable-parser=dca
--enable-parser=flac
--enable-parser=gsm
--enable-parser=mpegaudio
--enable-parser=tak
--enable-parser=vorbis
--enable-decoder=bmp
--enable-decoder=gif
--enable-decoder=jpeg2000
--enable-decoder=jpegls
--enable-decoder=mjpeg
--enable-decoder=mjpegb
--enable-decoder=pgm
--enable-decoder=png
--enable-decoder=ppm
--enable-decoder=tiff
--enable-demuxer=gif
--enable-demuxer=image2pipe
--enable-demuxer=image_bmp_pipe
--enable-demuxer=image_jpeg_pipe
--enable-demuxer=image_jpegls_pipe
--enable-demuxer=image_pgm_pipe
--enable-demuxer=image_png_pipe
--enable-demuxer=image_tiff_pipe
--enable-demuxer=mjpeg
--enable-demuxer=mjpeg_2000
--enable-encoder=mjpeg
--enable-encoder=png
--enable-muxer=image2
--enable-muxer=mjpeg
--enable-muxer=singlejpeg
--enable-parser=bmp
--enable-parser=mjpeg
--enable-parser=png
--enable-parser=pnm
--enable-bsf=mjpeg2jpeg

该列表很可能包含一些音频和图像处理不严格需要的额外功能，但这些选项解决了报告的问题。
您解决过这个问题吗？是的，我缺少一个配置选项。@Tim什么配置选项？请不要成为那种从不发布解决方案的人，让发现这一点的人束手无策。
auto fmtCtx = avformat_alloc_context();
int err = avformat_open_input(&fmtCtx, "/tmp/25.jpeg", NULL, NULL);

--disable-doc
--disable-debug
--disable-avdevice
--enable-swscale
--enable-rdft
--disable-ffmpeg
--disable-ffplay
--disable-ffprobe
--disable-ffserver
--disable-network
--disable-muxers
--disable-demuxers
--disable-zlib
--disable-bzlib
--disable-iconv
--disable-bsfs
--disable-filters
--disable-parsers
--disable-indevs
--disable-outdevs
--disable-encoders
--disable-decoders
--disable-hwaccels
--disable-nvenc
--disable-xvmc
--disable-videotoolbox
--disable-audiotoolbox
--disable-libxcb
--disable-network
--disable-sdl2
--disable-securetransport
--disable-xlib
--disable-filters
--enable-filter=aformat
--enable-filter=anull
--enable-filter=atrim
--enable-filter=format
--enable-filter=null
--enable-filter=setpts
--enable-filter=trim
--disable-protocols
--enable-protocol=file
--enable-protocol=pipe
--enable-demuxer=image2
--enable-demuxer=aac
--enable-demuxer=ac3
--enable-demuxer=aiff
--enable-demuxer=ape
--enable-demuxer=asf
--enable-demuxer=au
--enable-demuxer=avi
--enable-demuxer=flac
--enable-demuxer=flv
--enable-demuxer=matroska
--enable-demuxer=mov
--enable-demuxer=m4v
--enable-demuxer=mp3
--enable-demuxer=mpc
--enable-demuxer=mpc8
--enable-demuxer=ogg
--enable-demuxer=pcm_alaw
--enable-demuxer=pcm_mulaw
--enable-demuxer=pcm_f64be
--enable-demuxer=pcm_f64le
--enable-demuxer=pcm_f32be
--enable-demuxer=pcm_f32le
--enable-demuxer=pcm_s32be
--enable-demuxer=pcm_s32le
--enable-demuxer=pcm_s24be
--enable-demuxer=pcm_s24le
--enable-demuxer=pcm_s16be
--enable-demuxer=pcm_s16le
--enable-demuxer=pcm_s8
--enable-demuxer=pcm_u32be
--enable-demuxer=pcm_u32le
--enable-demuxer=pcm_u24be
--enable-demuxer=pcm_u24le
--enable-demuxer=pcm_u16be
--enable-demuxer=pcm_u16le
--enable-demuxer=pcm_u8
--enable-demuxer=rm
--enable-demuxer=shorten
--enable-demuxer=tak
--enable-demuxer=tta
--enable-demuxer=wav
--enable-demuxer=wv
--enable-demuxer=xwma
--enable-demuxer=dsf
--enable-decoder=aac
--enable-decoder=aac_latm
--enable-decoder=ac3
--enable-decoder=alac
--enable-decoder=als
--enable-decoder=ape
--enable-decoder=atrac1
--enable-decoder=atrac3
--enable-decoder=eac3
--enable-decoder=flac
--enable-decoder=gsm
--enable-decoder=gsm_ms
--enable-decoder=mp1
--enable-decoder=mp1float
--enable-decoder=mp2
--enable-decoder=mp2float
--enable-decoder=mp3
--enable-decoder=mp3adu
--enable-decoder=mp3adufloat
--enable-decoder=mp3float
--enable-decoder=mp3on4
--enable-decoder=mp3on4float
--enable-decoder=mpc7
--enable-decoder=mpc8
--enable-decoder=opus
--enable-decoder=ra_144
--enable-decoder=ra_288
--enable-decoder=ralf
--enable-decoder=shorten
--enable-decoder=tak
--enable-decoder=tta
--enable-decoder=vorbis
--enable-decoder=wavpack
--enable-decoder=wmalossless
--enable-decoder=wmapro
--enable-decoder=wmav1
--enable-decoder=wmav2
--enable-decoder=wmavoice
--enable-decoder=pcm_alaw
--enable-decoder=pcm_bluray
--enable-decoder=pcm_dvd
--enable-decoder=pcm_f32be
--enable-decoder=pcm_f32le
--enable-decoder=pcm_f64be
--enable-decoder=pcm_f64le
--enable-decoder=pcm_lxf
--enable-decoder=pcm_mulaw
--enable-decoder=pcm_s8
--enable-decoder=pcm_s8_planar
--enable-decoder=pcm_s16be
--enable-decoder=pcm_s16be_planar
--enable-decoder=pcm_s16le
--enable-decoder=pcm_s16le_planar
--enable-decoder=pcm_s24be
--enable-decoder=pcm_s24daud
--enable-decoder=pcm_s24le
--enable-decoder=pcm_s24le_planar
--enable-decoder=pcm_s32be
--enable-decoder=pcm_s32le
--enable-decoder=pcm_s32le_planar
--enable-decoder=pcm_u8
--enable-decoder=pcm_u16be
--enable-decoder=pcm_u16le
--enable-decoder=pcm_u24be
--enable-decoder=pcm_u24le
--enable-decoder=pcm_u32be
--enable-decoder=pcm_u32le
--enable-decoder=pcm_zork
--enable-decoder=dsd_lsbf
--enable-decoder=dsd_msbf
--enable-decoder=dsd_lsbf_planar
--enable-decoder=dsd_msbf_planar
--enable-parser=aac
--enable-parser=aac_latm
--enable-parser=ac3
--enable-parser=cook
--enable-parser=dca
--enable-parser=flac
--enable-parser=gsm
--enable-parser=mpegaudio
--enable-parser=tak
--enable-parser=vorbis
--enable-decoder=bmp
--enable-decoder=gif
--enable-decoder=jpeg2000
--enable-decoder=jpegls
--enable-decoder=mjpeg
--enable-decoder=mjpegb
--enable-decoder=pgm
--enable-decoder=png
--enable-decoder=ppm
--enable-decoder=tiff
--enable-demuxer=gif
--enable-demuxer=image2pipe
--enable-demuxer=image_bmp_pipe
--enable-demuxer=image_jpeg_pipe
--enable-demuxer=image_jpegls_pipe
--enable-demuxer=image_pgm_pipe
--enable-demuxer=image_png_pipe
--enable-demuxer=image_tiff_pipe
--enable-demuxer=mjpeg
--enable-demuxer=mjpeg_2000
--enable-encoder=mjpeg
--enable-encoder=png
--enable-muxer=image2
--enable-muxer=mjpeg
--enable-muxer=singlejpeg
--enable-parser=bmp
--enable-parser=mjpeg
--enable-parser=png
--enable-parser=pnm
--enable-bsf=mjpeg2jpeg