文档建议反馈控制台
首页
学习
活动
专区
圈层
工具
MCP广场
文章/答案/技术大牛
发布
首页
学习
活动
专区
圈层
工具
MCP广场
返回腾讯云官网
社区首页 >问答首页 >EMGU CV录像机无法制作视频

问EMGU CV录像机无法制作视频
EN

Stack Overflow用户
提问于 2015-07-04 05:53:42
回答 5查看 10.8K关注 0票数 4

我试着用Emgu CV VideoWriter捕捉视频，但它显示：

无法创建VideoWriter。确保安装了特定的编解码器。

我该怎么处理呢？

这就是我的代码的样子：

代码语言：javascript
运行
复制
Bitmap back = new Bitmap("jpg image path");
Image<Bgr, Byte> bg;
bg = new Image(Bgr, byte)(back);
vw = new VideoWriter("c://work//test1.mp4",CvInvoke.CV_FOURCC('M','S','V','C'), 17, 640, 480, true);

它对.avi扩展很好，但它的大小很大，仅几秒钟，所以我想压缩它更多。请建议对代码/库进行任何变通或更改。

c#
opencv
bitmap
emgucv
image-compression
EN

回答 5

Stack Overflow用户

发布于 2015-08-15 04:05:03

我也看到过这个问题。这是一个真正的痛苦，因为Emgu简历是一个很好的平台初学者！

由于有大约十个论坛的问题与这个主题有关，而且所有的问题都没有得到解答，而且没有在不同的委员会网上解决，我认为这值得更多的关注。

参见: FOURCC编码代码的http://www.fourcc.org/codecs.php。

C++代码：

代码语言：javascript
运行
复制
cout << "Codec Value: " << CV_FOURCC('D', 'I', 'V', '3') << endl;

回报: 861292868

C#代码：

代码语言：javascript
运行
复制
return Emgu.CV.CvInvoke.CV_FOURCC('D', 'I', 'V', '3');

回报: 861292868

因此，问题不在于函数/方法"CV_FOURCC“，而必须是在分配的代码中传递这个变量：

代码语言：javascript
运行
复制
int Codec = Emgu.CV.CvInvoke.CV_FOURCC('D', 'I', 'V', '3');
Emgu.CV.VideoWriter(path, Codec, 20, 640, 480, true);

Emgu.CV.VideoWriter类是我唯一能看到的问题。这些文件没有说明任何已知的这类问题：

http://www.emgu.com/wiki/files/1.3.0.0/html/3fb90645-ecc4-0c4e-b238-6d0ca38f4ebc.htm

以及：

http://www.emgu.com/wiki/files/1.3.0.0/html/a3e01212-2f4e-6ac8-7c74-77ddb5c16299.htm

这是一个答案吗，不，这是一个进一步研究Emgu.CV.VideoWriter类的命题。

编辑

根据文档，a-1应该打开“编解码器选择对话框”窗口。

使用C++和OpenCV，将出现此窗口，您可以从安装在计算机上的已安装的编解码器中选择：

​

​

使用C#和Emgu CV和-1作为Codec对话框选择，我得到了窗口，但是一些项目一旦选择Codec就无法工作：

​

如您所见，即使使用了相同的PC，Codec选择也是不一样的。

事实仍然是，使用C++和OpenCV，这一行代码可以工作：

代码语言：javascript
运行
复制
myVideoWriter = VideoWriter(path, CV_FOURCC('D', 'I', 'V', '3'), 30, fSize, true);

使用C#和Emgu CV，这行代码没有：

代码语言：javascript
运行
复制
myVideoWriter = new VideoWriter(path, CvInvoke.CV_FOURCC('D', 'I', 'V', '3'), 20, 640, 480, true);

编辑

我只是用了：

代码语言：javascript
运行
复制
CvInvoke.CV_FOURCC('I', 'Y', 'U', 'V')

这给了我相当好的压缩和视频质量。下面是我编写的FOURCC类，以帮助解决这个问题：

代码语言：javascript
运行
复制
public class FourCC
{
    /// <summary>
    /// Opens the Codec Selection Dialog...
    /// </summary>
    public static int UserSelect = -1;

    public static int _1978 = 943143217;
    public static int _2VUY = 1498764850;
    public static int _3IV0 = 810961203;
    public static int _3IV1 = 827738419;
    public static int _3IV2 = 844515635;
    public static int _3IVD = 1146505523;
    public static int _3IVX = 1482049843;
    public static int _8BPS = 1397768760;
    public static int AAS4 = 877871425;
    public static int AASC = 1129529665;
    public static int ABYR = 1381581377;
    public static int ACTL = 1280590657;
    public static int ADV1 = 827737153;
    public static int ADVJ = 1247167553;
    public static int AEIK = 1263093057;
    public static int AEMI = 1229800769;
    public static int AFLC = 1129072193;
    public static int AFLI = 1229735489;
    public static int AHDV = 1447315521;
    public static int AJPG = 1196444225;
    public static int AMPG = 1196444993;
    public static int ANIM = 1296649793;
    public static int AP41 = 825512001;
    public static int AP42 = 842289217;
    public static int ASLC = 1129075521;
    public static int ASV1 = 827740993;
    public static int ASV2 = 844518209;
    public static int ASVX = 1482052417;
    public static int ATM4 = 877483073;
    public static int AUR2 = 844256577;
    public static int AURA = 1095914817;
    public static int AVC1 = 826496577;
    public static int AVRN = 1314018881;
    public static int BA81 = 825770306;
    public static int BINK = 1263421762;
    public static int BLZ0 = 811224130;
    public static int BT20 = 808604738;
    public static int BTCV = 1447253058;
    public static int BW10 = 808539970;
    public static int BYR1 = 827480386;
    public static int BYR2 = 844257602;
    public static int CC12 = 842089283;
    public static int CDVC = 1129727043;
    public static int CFCC = 1128482371;
    public static int CGDI = 1229211459;
    public static int CHAM = 1296123971;
    public static int CJPG = 1196444227;
    public static int CMYK = 1264143683;
    public static int CPLA = 1095520323;
    public static int CRAM = 1296126531;
    public static int CSCD = 1145262915;
    public static int CTRX = 1481790531;
    public static int CVID = 1145656899;
    public static int CWLT = 1414289219;
    public static int CXY1 = 827938883;
    public static int CXY2 = 844716099;
    public static int CYUV = 1448433987;
    public static int CYUY = 1498765635;
    public static int D261 = 825635396;
    public static int D263 = 859189828;
    public static int DAVC = 1129726276;
    public static int DCL1 = 827081540;
    public static int DCL2 = 843858756;
    public static int DCL3 = 860635972;
    public static int DCL4 = 877413188;
    public static int DCL5 = 894190404;
    public static int DIV3 = 861292868;
    public static int DIV4 = 878070084;
    public static int DIV5 = 894847300;
    public static int DIVX = 1482049860;
    public static int DM4V = 1446268228;
    public static int DMB1 = 826428740;
    public static int DMB2 = 843205956;
    public static int DMK2 = 843795780;
    public static int DSVD = 1146508100;
    public static int DUCK = 1262703940;
    public static int DV25 = 892491332;
    public static int DV50 = 808801860;
    public static int DVAN = 1312904772;
    public static int DVCS = 1396921924;
    public static int DVE2 = 843404868;
    public static int DVH1 = 826824260;
    public static int DVHD = 1145591364;
    public static int DVSD = 1146312260;
    public static int DVSL = 1280529988;
    public static int DVX1 = 827872836;
    public static int DVX2 = 844650052;
    public static int DVX3 = 861427268;
    public static int DX50 = 808802372;
    public static int DXGM = 1296521284;
    public static int DXTC = 1129601092;
    public static int DXTN = 1314150468;
    public static int EKQ0 = 810634053;
    public static int ELK0 = 810241093;
    public static int EM2V = 1446137157;
    public static int ES07 = 925913925;
    public static int ESCP = 1346589509;
    public static int ETV1 = 827741253;
    public static int ETV2 = 844518469;
    public static int ETVC = 1129731141;
    public static int FFV1 = 827737670;
    public static int FLJP = 1347046470;
    public static int FMP4 = 877677894;
    public static int FMVC = 1129729350;
    public static int FPS1 = 827543622;
    public static int FRWA = 1096241734;
    public static int FRWD = 1146573382;
    public static int FVF1 = 826693190;
    public static int GEOX = 1481590087;
    public static int GJPG = 1196444231;
    public static int GLZW = 1465535559;
    public static int GPEG = 1195724871;
    public static int GWLT = 1414289223;
    public static int H260 = 808858184;
    public static int H261 = 825635400;
    public static int H262 = 842412616;
    public static int H263 = 859189832;
    public static int H264 = 875967048;
    public static int H265 = 892744264;
    public static int H266 = 909521480;
    public static int H267 = 926298696;
    public static int H268 = 943075912;
    public static int H269 = 959853128;
    public static int HDYC = 1129923656;
    public static int HEVC = 1129727304;
    public static int HFYU = 1431914056;
    public static int HMCR = 1380142408;
    public static int HMRR = 1381125448;
    public static int I263 = 859189833;
    public static int ICLB = 1112294217;
    public static int IGOR = 1380927305;
    public static int IJPG = 1196444233;
    public static int ILVC = 1129729097;
    public static int ILVR = 1381387337;
    public static int IPDV = 1447317577;
    public static int IR21 = 825381449;
    public static int IRAW = 1463898697;
    public static int ISME = 1162695497;
    public static int IV30 = 808670793;
    public static int IV31 = 825448009;
    public static int IV32 = 842225225;
    public static int IV33 = 859002441;
    public static int IV34 = 875779657;
    public static int IV35 = 892556873;
    public static int IV36 = 909334089;
    public static int IV37 = 926111305;
    public static int IV38 = 942888521;
    public static int IV39 = 959665737;
    public static int IV40 = 808736329;
    public static int IV41 = 825513545;
    public static int IV42 = 842290761;
    public static int IV43 = 859067977;
    public static int IV44 = 875845193;
    public static int IV45 = 892622409;
    public static int IV46 = 909399625;
    public static int IV47 = 926176841;
    public static int IV48 = 942954057;
    public static int IV49 = 959731273;
    public static int IV50 = 808801865;

    /// <summary>
    /// This is considered to be the Dfault Fallback Codec for Linux and also Windows may be following suit.
    /// Not in the Litrature on the FOURCC website.
    /// See: http://www.emgu.com/wiki/index.php/Video_Files
    /// </summary>
    public static int IYUV = 1448433993;

    public static int JBYR = 1381581386;
    public static int JPEG = 1195724874;
    public static int JPGL = 1279742026;
    public static int KMVC = 1129729355;
    public static int L261 = 825635404;
    public static int L263 = 859189836;
    public static int LBYR = 1381581388;
    public static int LCMW = 1464681292;
    public static int LCW2 = 844579660;
    public static int LEAD = 1145128268;
    public static int LGRY = 1498564428;
    public static int LJ11 = 825313868;
    public static int LJ22 = 842156620;
    public static int LJ2K = 1261587020;
    public static int LJ44 = 875842124;
    public static int LJPG = 1196444236;
    public static int LMP2 = 844123468;
    public static int LMP4 = 877677900;
    public static int LSVC = 1129730892;
    public static int LSVM = 1297503052;
    public static int LSVX = 1482052428;
    public static int LZO1 = 827284044;
    public static int M261 = 825635405;
    public static int M263 = 859189837;
    public static int M4CC = 1128477773;
    public static int M4S2 = 844313677;
    public static int MC12 = 842089293;
    public static int MCAM = 1296122701;
    public static int MJ2C = 1127369293;
    public static int MJPG = 1196444237;
    public static int MMES = 1397050701;
    public static int MP2A = 1093816397;
    public static int MP2T = 1412583501;
    public static int MP2V = 1446137933;
    public static int MP42 = 842289229;
    public static int MP43 = 859066445;
    public static int MP4A = 1093947469;
    public static int MP4S = 1395937357;
    public static int MP4T = 1412714573;
    public static int MP4V = 1446269005;
    public static int MPEG = 1195724877;
    public static int MPG4 = 877088845;
    public static int MPGI = 1229410381;
    public static int MR16 = 909201997;
    public static int MRCA = 1094931021;
    public static int MRLE = 1162629709;
    public static int MSVC = 1129730893;
    public static int MSZH = 1213879117;
    public static int MTX1 = 827872333;
    public static int MTX2 = 844649549;
    public static int MTX3 = 861426765;
    public static int MTX4 = 878203981;
    public static int MTX5 = 894981197;
    public static int MTX6 = 911758413;
    public static int MTX7 = 928535629;
    public static int MTX8 = 945312845;
    public static int MTX9 = 962090061;
    public static int MVI1 = 826889805;
    public static int MVI2 = 843667021;
    public static int MWV1 = 827742029;
    public static int NAVI = 1230389582;
    public static int NDSC = 1129530446;
    public static int NDSM = 1297302606;
    public static int NDSP = 1347634254;
    public static int NDSS = 1397965902;
    public static int NDXC = 1129858126;
    public static int NDXH = 1213744206;
    public static int NDXP = 1347961934;
    public static int NDXS = 1398293582;
    public static int NHVU = 1431717966;
    public static int NTN1 = 827216974;
    public static int NTN2 = 843994190;
    public static int NVDS = 1396987470;
    public static int NVHS = 1397249614;
    public static int NVS0 = 810767950;
    public static int NVS1 = 827545166;
    public static int NVS2 = 844322382;
    public static int NVS3 = 861099598;
    public static int NVS4 = 877876814;
    public static int NVS5 = 894654030;
    public static int NVT0 = 810833486;
    public static int NVT1 = 827610702;
    public static int NVT2 = 844387918;
    public static int NVT3 = 861165134;
    public static int NVT4 = 877942350;
    public static int NVT5 = 894719566;
    public static int PDVC = 1129727056;
    public static int PGVV = 1448494928;
    public static int PHMO = 1330464848;
    public static int PIM1 = 827148624;
    public static int PIM2 = 843925840;
    public static int PIMJ = 1246579024;
    public static int PIXL = 1280854352;
    public static int PJPG = 1196444240;
    public static int PVEZ = 1514493520;
    public static int PVMM = 1296914000;
    public static int PVW2 = 844584528;
    public static int QPEG = 1195724881;
    public static int QPEQ = 1363497041;
    public static int RGBT = 1413629778;
    public static int RLE = 1162629727;
    public static int RLE4 = 876956754;
    public static int RLE8 = 944065618;
    public static int RMP4 = 877677906;
    public static int RPZA = 1096437842;
    public static int RT21 = 825381970;
    public static int RV20 = 808605266;
    public static int RV30 = 808670802;
    public static int RV40 = 808736338;
    public static int S422 = 842150995;
    public static int SAN3 = 860766547;
    public static int SDCC = 1128481875;
    public static int SEDG = 1195656531;
    public static int SFMC = 1129137747;
    public static int SMP4 = 877677907;
    public static int SMSC = 1129532755;
    public static int SMSD = 1146309971;
    public static int SMSV = 1448299859;
    public static int SP40 = 808734803;
    public static int SP44 = 875843667;
    public static int SP54 = 875909203;
    public static int SPIG = 1195987027;
    public static int SQZ2 = 844779859;
    public static int STVA = 1096176723;
    public static int STVB = 1112953939;
    public static int STVC = 1129731155;
    public static int STVX = 1482052691;
    public static int STVY = 1498829907;
    public static int SV10 = 808539731;
    public static int SVQ1 = 827414099;
    public static int SVQ3 = 860968531;
    public static int TLMS = 1397574740;
    public static int TLST = 1414745172;
    public static int TM20 = 808602964;
    public static int TM2X = 1479691604;
    public static int TMIC = 1128877396;
    public static int TMOT = 1414483284;
    public static int TR20 = 808604244;
    public static int TSCC = 1128485716;
    public static int TV10 = 808539732;
    public static int TVJP = 1347049044;
    public static int TVMJ = 1246582356;
    public static int TY0N = 1311791444;
    public static int TY2C = 1127373140;
    public static int TY2N = 1311922516;
    public static int UCOD = 1146045269;
    public static int ULTI = 1230261333;
    public static int V210 = 808530518;
    public static int V261 = 825635414;
    public static int V655 = 892679766;
    public static int VCR1 = 827474774;
    public static int VCR2 = 844251990;
    public static int VCR3 = 861029206;
    public static int VCR4 = 877806422;
    public static int VCR5 = 894583638;
    public static int VCR6 = 911360854;
    public static int VCR7 = 928138070;
    public static int VCR8 = 944915286;
    public static int VCR9 = 961692502;
    public static int VDCT = 1413694550;
    public static int VDOM = 1297040470;
    public static int VDOW = 1464812630;
    public static int VDTZ = 1515471958;
    public static int VGPX = 1481656150;
    public static int VIDS = 1396984150;
    public static int VIFP = 1346783574;
    public static int VIVO = 1331054934;
    public static int VIXL = 1280854358;
    public static int VLV1 = 827739222;
    public static int VP30 = 808669270;
    public static int VP31 = 825446486;
    public static int VP40 = 808734806;
    public static int VP50 = 808800342;
    public static int VP60 = 808865878;
    public static int VP61 = 825643094;
    public static int VP62 = 842420310;
    public static int VP70 = 808931414;
    public static int VP80 = 808996950;
    public static int VQC1 = 826495318;
    public static int VQC2 = 843272534;
    public static int VQJC = 1128943958;
    public static int VSSV = 1448301398;
    public static int VUUU = 1431655766;
    public static int VX1K = 1261525078;
    public static int VX2K = 1261590614;
    public static int VXSP = 1347639382;
    public static int VYU9 = 961894742;
    public static int VYUY = 1498765654;
    public static int WBVC = 1129726551;
    public static int WHAM = 1296123991;
    public static int WINX = 1481525591;
    public static int WJPG = 1196444247;
    public static int WMV1 = 827739479;
    public static int WMV2 = 844516695;
    public static int WMV3 = 861293911;
    public static int WMVA = 1096174935;
    public static int WNV1 = 827739735;
    public static int WVC1 = 826496599;
    public static int X263 = 859189848;
    public static int X264 = 875967064;
    public static int XLV0 = 810962008;
    public static int XMPG = 1196445016;
    public static int XVID = 1145656920;
    public static int XWV0 = 810964824;
    public static int XWV1 = 827742040;
    public static int XWV2 = 844519256;
    public static int XWV3 = 861296472;
    public static int XWV4 = 878073688;
    public static int XWV5 = 894850904;
    public static int XWV6 = 911628120;
    public static int XWV7 = 928405336;
    public static int XWV8 = 945182552;
    public static int XWV9 = 961959768;
    public static int XXAN = 1312905304;
    public static int Y16 = 909203807;
    public static int Y411 = 825308249;
    public static int Y41P = 1345401945;
    public static int Y444 = 875836505;
    public static int Y8 = 945381215;
    public static int YC12 = 842089305;
    public static int YUV8 = 945182041;
    public static int YUV9 = 961959257;
    public static int YUVP = 1347835225;
    public static int YUY2 = 844715353;
    public static int YUYV = 1448695129;
    public static int YV12 = 842094169;
    public static int YV16 = 909203033;
    public static int YV92 = 842618457;
    public static int ZLIB = 1112099930;
    public static int ZMBV = 1447185754;
    public static int ZPEG = 1195724890;
    public static int ZYGO = 1330075994;
    public static int ZYYY = 1499027802;
}

只需通过：

代码语言：javascript
运行
复制
FourCC.IYUV

万事如意

克里斯

票数 11
EN

Stack Overflow用户

发布于 2018-04-30 22:17:07

我非常幸运地在FOURCC设置中使用了XVID。它为我的应用程序提供了最好的压缩。

我注意到，我使用的Emgu版本使用了一种不同的机制来指定VideoWriter中的FOURCC值。

我用来获取XVID编码器的调用是：

代码语言：javascript
运行
复制
    VideoWriter video = new VideoWriter(saveFilename, VideoWriter.Fourcc('X', 'V', 'I', 'D'), fps, videoFrameSize, true);

关键是发现VideoWriter本身有一种指定Fourcc设置的方法。

代码语言：javascript
运行
复制
VideoWriter.Fourcc('X', 'V', 'I', 'D')
票数 1
EN

Stack Overflow用户

发布于 2019-06-19 21:10:53

对我来说，问题在于fileName参数期待反斜杠，但我使用的是正斜杠。例如，c://work//test1.mp4抛出原始海报描述的异常，但c:\work\test1.mp4工作。

票数 1
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/31217410

复制
相关文章

相似问题

领券

腾讯云开发者

扫码关注腾讯云开发者

扫码关注腾讯云开发者

领取腾讯云代金券

热门产品

热门推荐

更多推荐

Copyright © 2013 - 2025 Tencent Cloud. All Rights Reserved. 腾讯云 版权所有 

深圳市腾讯计算机系统有限公司 ICP备案/许可证号：粤B2-20090059 深公网安备号 44030502008569

腾讯云计算（北京）有限责任公司 京ICP证150476号 |  京ICP备11018762号 | 京公网安备号11010802020287

问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档