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Sur d’autres sites (13854)

  • Node.js child_process TypeError : Cannot read property '_writableState' of undefined

    15 mai 2018, par functorial

    I am trying to wrap a piece of ffmpeg’s functionality in a Node.js API, using the child_process library, but when I attempt to send any data to ffmpeg’s stdin pipe, I get an error TypeError: Cannot read property '_writableState' of undefined.

    import {spawn} from "child_process"
    

    
export default frames => {
    
    // Spawn ffmpeg process
    
    const ffmpeg = spawn("ffmpeg", ["-f", "image2pipe", "-i", "-", "output.mkv"])
    
    // Send frames to ffmpeg as stdin
    
    frames.forEach(ffmpeg.stdin.write)
    

    
    // Listen for output and errors
    
    return new Promise((resolve, reject) => {
    
        const chunks = []
    

    
        ffmpeg.stdout.on("data", chunks.push)
    
        ffmpeg.stderr.on("data", reject(data))
    
        ffmpeg.on("close", code =>
    
            resolve(Buffer.concat(chunks))
    
        )
    
    })
    
}

    Error :

    TypeError: Cannot read property '_writableState' of undefined
    
    at Writable.write (_stream_writable.js:270:20)
    
    at Array.forEach (<anonymous>)
    
    at exports.default (/home/fiendfan1/workspace/nodejs/declare/dist/app/common/encodeVideo.js:21:12)
    
    at _callee$ (/home/fiendfan1/workspace/nodejs/declare/dist/app/tests/video.js:34:84)
    
    at tryCatch (/home/fiendfan1/workspace/nodejs/declare/node_modules/regenerator-runtime/runtime.js:65:40)
    
    at Generator.invoke [as _invoke] (/home/fiendfan1/workspace/nodejs/declare/node_modules/regenerator-runtime/runtime.js:303:22)
    
    at Generator.prototype.(anonymous function) [as next] (/home/fiendfan1/workspace/nodejs/declare/node_modules/regenerator-runtime/runtime.js:117:21)
    
    at Generator.tryCatcher (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/util.js:16:23)
    
    at PromiseSpawn._promiseFulfilled (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/generators.js:97:49)
    
    at Promise._settlePromise (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/promise.js:574:26)
    
    at Promise._settlePromise0 (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/promise.js:614:10)
    
    at Promise._settlePromises (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/promise.js:693:18)
    
    at Async._drainQueue (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/async.js:133:16)
    
    at Async._drainQueues (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/async.js:143:10)
    
    at Immediate.Async.drainQueues [as _onImmediate] (/home/fiendfan1/workspace/nodejs/declare/node_modules/bluebird/js/release/async.js:17:14)
    
    at runCallback (timers.js:696:18)
    
</anonymous>

  • Python script than run another python script, ffmpeg2vmaf

    16 mai 2018, par Asusio

    I want to build a little API to use ffmpeg2vmaf to analyze videos that are made for the video streaming (DASH, HLS).

    I’m on Linux Ubuntu 16.04, I’m using python 3.

    My API can now concatenate the files into an MP4 file. To do it I’m using the library subprocess and the command cat.

    But when I want to use ffmpeg2vmaf it can’t find a library that ffmpeg2vmaf use.

    This is how I do :

    try:
    
    os.chdir("/home/USERNAME/VMAF/vmaf/")
    
    output_cmd = subprocess.check_output(["sudo ./ffmpeg2vmaf WIDTH HEIGHT \
    
                 '/home/alexis/video/ref.mp4' '/home/alexis/video/dist.mp4'\
    
                 >> '/home/alexis/analyze/analyze.txt'"], shell = True)
    
except subprocess.CalledProcessError:
    
    print("Error")

    The error is :

    Traceback (most recent call last):
    
    File "./ffmpeg2vmaf", line 8, in <module>
    
        from vmaf.config import VmafConfig, DisplayConfig
    
ImportError: No module named vmaf.config
    
</module>

    But if I use the same command without python, in the terminal, it works.

    I have try to put my API in the same folder as "ffmpeg2vmaf" but it still doesn’t work.

    Thank you by advance

  • Linking libavcodec and libavformat : Undefined references

    8 décembre 2014, par Abhijit

    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

    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

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

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