链接libav codeC和了libavformat：未定义的引用 [英] Linking libavcodec and libavformat: Undefined references

问题描述

我试图编译一个项目，我对使用的ffmpeg库工作。该项目是用C写的头文件适当地包括在源$ C ​​$ C。特别是，它似乎是使用 libav codeC 和了libavformat ，和这些库适当地链接Makefile中的LDFLAGS。下面是使用的标志：

I am trying to compile a project I am working on that uses ffmpeg libraries. The project is written in C. The header files are appropriately included in the source code. In particular, it seems to be using libavcodec and libavformat, and these libraries are appropriately linked in the Makefile with the LDFLAGS. Here are the flags used:

-lavcodec -lavformat -lswscale -lavutil

现在，因为Ubuntu配有包装的图书馆是太出过期，我下载了最新的源$ C ​​$ c代表的ffmpeg，编译并安装它。我删除了所有通过包管理器已安装的打包库。现在，尽管上面添加的标志，我得到了很多未定义的引用，我似乎无法修复它。这里是输出关于所述未定义的引用：

Now, because the packaged libraries that come with Ubuntu were too out-of-date, I downloaded the latest source code for ffmpeg, compiled it and installed it. I removed all of the packaged libraries that were installed via the package manager. Now, despite adding the flags above, I get a lot of undefined references and I cannot seem to fix it. Here is the output with regard to the undefined references:

//usr/local/lib/libavcodec.a(cscd.o): In function `decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/cscd.c:91: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(dxa.o): In function `decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/dxa.c:250: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(exr.o): In function `pxr24_uncompress':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/exr.c:784: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(exr.o): In function `zip_uncompress':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/exr.c:259: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(flashsv.o): In function `flashsv_decode_block':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:191: undefined reference to `inflateReset'
//usr/local/lib/libavcodec.a(flashsv.o): In function `flashsv2_prime':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:158: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:160: undefined reference to `deflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:166: undefined reference to `deflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:167: undefined reference to `deflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:169: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:178: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(flashsv.o): In function `flashsv_decode_block':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:207: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:210: undefined reference to `inflateSync'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:211: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(flashsv.o): In function `calc_deflate_block_size':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:259: undefined reference to `deflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:261: undefined reference to `deflateBound'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:262: undefined reference to `deflateEnd'
//usr/local/lib/libavcodec.a(flashsv.o): In function `flashsv_decode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:107: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(flashsv.o): In function `flashsv_decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv.c:126: undefined reference to `inflateInit_'
//usr/local/lib/libavcodec.a(flashsv2enc.o): In function `encode_zlib':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv2enc.c:354: undefined reference to `compress2'
//usr/local/lib/libavcodec.a(flashsv2enc.o): In function `encode_zlibprime':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv2enc.c:366: undefined reference to `deflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv2enc.c:375: undefined reference to `deflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv2enc.c:384: undefined reference to `deflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsv2enc.c:385: undefined reference to `deflateEnd'
//usr/local/lib/libavcodec.a(flashsvenc.o): In function `encode_bitstream':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsvenc.c:190: undefined reference to `compress2'
//usr/local/lib/libavcodec.a(flashsvenc.o): In function `flashsv_encode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/flashsvenc.c:95: undefined reference to `deflateEnd'
//usr/local/lib/libavcodec.a(g2meet.o): In function `kempf_decode_tile':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/g2meet.c:408: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(lcldec.o): In function `zlib_decomp':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:137: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:146: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:137: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:146: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:137: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:146: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(lcldec.o): In function `decode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:647: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(lcldec.o): In function `decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lcldec.c:623: undefined reference to `inflateInit_'
//usr/local/lib/libavcodec.a(lclenc.o): In function `encode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:80: undefined reference to `deflateBound'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:90: undefined reference to `deflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:101: undefined reference to `deflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:107: undefined reference to `deflate'
//usr/local/lib/libavcodec.a(lclenc.o): In function `encode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:184: undefined reference to `deflateEnd'
//usr/local/lib/libavcodec.a(lclenc.o): In function `encode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/lclenc.c:165: undefined reference to `deflateInit_'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_subpacket':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:376: undefined reference to `swr_is_initialized'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:222: undefined reference to `swr_is_initialized'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_init_resample':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:163: undefined reference to `swr_init'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:169: undefined reference to `swr_convert'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:236: undefined reference to `swr_convert'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_flush_resample':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:117: undefined reference to `swr_convert'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_subpacket':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:408: undefined reference to `swr_close'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_flush':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:563: undefined reference to `swr_close'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_close':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:585: undefined reference to `swr_free'
//usr/local/lib/libavcodec.a(opusdec.o): In function `opus_decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/opusdec.c:638: undefined reference to `swr_alloc'
//usr/local/lib/libavcodec.a(pngdec.o): In function `decode_zbuf':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:425: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:439: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:448: undefined reference to `inflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:453: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(pngdec.o): In function `png_decode_idat':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:393: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(pngdec.o): In function `decode_frame_apng':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:1179: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:1203: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(pngdec.o): In function `decode_frame_png':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:1126: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngdec.c:1142: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(pngenc.o): In function `png_write_chunk':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:200: undefined reference to `crc32'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:202: undefined reference to `crc32'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:205: undefined reference to `crc32'
//usr/local/lib/libavcodec.a(pngenc.o): In function `encode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:298: undefined reference to `deflateInit2_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:303: undefined reference to `deflateBound'
//usr/local/lib/libavcodec.a(pngenc.o): In function `png_write_row':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:220: undefined reference to `deflate'
//usr/local/lib/libavcodec.a(pngenc.o): In function `encode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:447: undefined reference to `deflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:422: undefined reference to `deflate'
//usr/local/lib/libavcodec.a(pngenc.o): In function `png_write_row':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:220: undefined reference to `deflate'
//usr/local/lib/libavcodec.a(pngenc.o): In function `png_write_chunk':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:200: undefined reference to `crc32'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/pngenc.c:202: undefined reference to `crc32'
//usr/local/lib/libavcodec.a(svq3.o): In function `svq3_decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/svq3.c:1016: undefined reference to `uncompress'
//usr/local/lib/libavcodec.a(tiff.o): In function `tiff_uncompress':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tiff.c:329: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tiff.c:334: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tiff.c:335: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(tiffenc.o): In function `encode_strip':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tiffenc.c:175: undefined reference to `compress'
//usr/local/lib/libavcodec.a(tscc.o): In function `decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tscc.c:77: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tscc.c:86: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(tscc.o): In function `decode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tscc.c:173: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(tscc.o): In function `decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/tscc.c:155: undefined reference to `inflateInit_'
//usr/local/lib/libavcodec.a(zerocodec.o): In function `zerocodec_decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zerocodec.c:56: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zerocodec.c:79: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(zerocodec.o): In function `zerocodec_decode_close':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zerocodec.c:109: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(zerocodec.o): In function `zerocodec_decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zerocodec.c:127: undefined reference to `inflateInit_'
//usr/local/lib/libavcodec.a(zmbv.o): In function `decode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbv.c:486: undefined reference to `inflateReset'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbv.c:523: undefined reference to `inflate'
//usr/local/lib/libavcodec.a(zmbv.o): In function `decode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbv.c:616: undefined reference to `inflateEnd'
//usr/local/lib/libavcodec.a(zmbv.o): In function `decode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbv.c:601: undefined reference to `inflateInit_'
//usr/local/lib/libavcodec.a(zmbvenc.o): In function `encode_frame':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbvenc.c:224: undefined reference to `deflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbvenc.c:215: undefined reference to `deflateReset'
//usr/local/lib/libavcodec.a(zmbvenc.o): In function `encode_end':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbvenc.c:259: undefined reference to `deflateEnd'
//usr/local/lib/libavcodec.a(zmbvenc.o): In function `encode_init':
/home/abhijitv/Downloads/ffmpeg-2.5/libavcodec/zmbvenc.c:321: undefined reference to `deflateInit_'
//usr/local/lib/libavformat.a(rtmpproto.o): In function `rtmp_uncompress_swfplayer':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/rtmpproto.c:1097: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/rtmpproto.c:1107: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/rtmpproto.c:1125: undefined reference to `inflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/rtmpproto.c:1125: undefined reference to `inflateEnd'
//usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_packet':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/swfdec.c:335: undefined reference to `uncompress'
//usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_header':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/swfdec.c:124: undefined reference to `inflateInit_'
//usr/local/lib/libavformat.a(swfdec.o): In function `zlib_refill':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/swfdec.c:92: undefined reference to `inflate'
//usr/local/lib/libavformat.a(swfdec.o): In function `swf_read_close':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/swfdec.c:502: undefined reference to `inflateEnd'
//usr/local/lib/libavformat.a(http.o): In function `http_close':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/http.c:1093: undefined reference to `inflateEnd'
//usr/local/lib/libavformat.a(http.o): In function `parse_content_encoding':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/http.c:419: undefined reference to `inflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/http.c:420: undefined reference to `inflateInit2_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/http.c:425: undefined reference to `zlibCompileFlags'
//usr/local/lib/libavformat.a(http.o): In function `http_buf_read_compressed':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/http.c:902: undefined reference to `inflate'
//usr/local/lib/libavformat.a(id3v2.o): In function `id3v2_parse':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/id3v2.c:900: undefined reference to `uncompress'
//usr/local/lib/libavformat.a(matroskadec.o): In function `matroska_decode_buffer':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/matroskadec.c:1212: undefined reference to `inflateInit_'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/matroskadec.c:1227: undefined reference to `inflate'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/matroskadec.c:1220: undefined reference to `inflateEnd'
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/matroskadec.c:1232: undefined reference to `inflateEnd'
//usr/local/lib/libavformat.a(mov.o): In function `mov_read_cmov':
/home/abhijitv/Downloads/ffmpeg-2.5/libavformat/mov.c:3146: undefined reference to `uncompress'
collect2: error: ld returned 1 exit status

任何人能解释这是怎么回事错在这里，我怎么能解决这个问题？

Can anyone explain what is going wrong over here, and how I can fix this?

推荐答案

您错过一些库。结果
附加：

You're missing some libraries.
Append:

-lswresample -lm -lz

这篇关于链接libav codeC和了libavformat：未定义的引用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！