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Sur d’autres sites (12347)

  • Issues with processing media on windows Azure

    23 septembre 2015, par Ahmed Mujtaba

    I have a website built on ASP.NET web forms that works as a media portal for users to upload videos. I’m using ffmpeg encoders to produce video contents to be streamed in the browser. I’m using the web deploy method to publish the site on the Azure server. The website get’s deployed properly however I get following issues in the live site.

    1. Video never get’s encoded and published. I get some sort of error.

    2. Video get’s published but the process of uploading and encoding the video is way too slow on the web server.

    My project solution contains upload.ashx that handles the upload requests and makes the call to encode.ashx which is responsible for the encoding and publishing of the videos. I tried to remotely debug the site but the debugger never get’s to encode.ashx.

    I was wondering if these issues can be resolved by having the website deployed with a VM ?

    Script that uploads the video file :

    var filesuploaded = 0;
       var faileduploaded = 0;

       $(function () {
           var uploader = new plupload.Uploader({
               runtimes: 'gears,html5,flash,silverlight,browserplus',
               browse_button: '<%= pickfiles.ClientID %>',
               container: 'container',
               max_file_size: '<%= MaxMediaSize %>mb',
               url: '<%=Config.GetUrl() %>videos/upload/upload.ashx',
               flash_swf_url: '<%=Config.GetUrl() %>plupload/js/plupload.flash.swf',
               silverlight_xap_url: '<%=Config.GetUrl() %>plupload/js/plupload.silverlight.xap',
               chunk_size: '4mb',
               <%= UniqueNames %>
               filters: [
               { title: '<%= AllowedFormatsDisplay %>', extensions: '<%= AllowedFormats %>'}],
               headers: { UName: '<%=UserName %>', MTP: '<%= MediaType %>' }
           });
           //uploader.bind('Init', function (up, params) {
           //    $('#filelist').html("<div>Current runtime: " + params.runtime + "</div>");
           //});

           uploader.init();

           $('#uploadfiles').click(function (e) {
               uploader.start();
               e.preventDefault();
               $("#uploadfiles").hide();
               $("#&lt;%= embd.ClientID %>").hide();
           });

           uploader.bind('FilesAdded', function (up, files) {
               $("#uploadfiles").show();
               $("#&lt;%= msg.ClientID %>").html("");
               var count=0;
               $.each(files, function (i, file) {
                   $('#filelist').append(
                       '<div class="item_pad_4 bx_br_bt">' + (count + 1) + ': ' + file.name + ' (' + plupload.formatSize(file.size) + ')  <b></b></div>' );
                   count++;
               });
               var maxupload = &lt;%= MaxVideoUploads %>;
               if(count > maxupload)
               {              
                   $.each(files, function(i, file) {
                       uploader.removeFile(file);
                   });

                   $('#filelist').html("");
                   $("#uploadfiles").hide();
                   Display_Message("#&lt;%= msg.ClientID %>", "Can't upload more than " + maxupload + " records at once!", 1, 1);
                   return false;
               }
               else {
                   $("#tfiles").html(count);
                   $("#uploadfiles").removeClass("disabled");
                   $("#&lt;%= pickfiles.ClientID %>").hide();
               }
               up.refresh(); // Reposition Flash/Silverlight
           });

           uploader.bind('UploadProgress', function (up, file) {
               $('#' + file.id + " b").html(file.percent + "%");
           });

           uploader.bind('Error', function (up, err) {
               $('#filelist').append("<div>Error: " + err.code +
                   ", Message: " + err.message +
                   (err.file ? ", File: " + err.file.name : "") +
                   "</div>"
               );
               up.refresh(); // Reposition Flash/Silverlight
           });

           var failedstatus = 0;
           uploader.bind('FileUploaded', function (up, file, info) {
               // encode started
               if (info.response != "failed" &amp;&amp; info.response != "") {
                   EncodeVD(file.id, info.response, file.size);
                   Display_Message('#' + file.id, "Please wait for final processing", 0, 1);
                   if (failedstatus == 0)
                       Redirect(info.response);
                   filesuploaded++;
               }
               else {
                   Display_Message('#' + file.id, "Response is: " + info.response, 0, 1);
               }
           });
       });
       var redcnt = 0;
       function Redirect(filename) {
           var IntervalID = setInterval(function () {
               redcnt++;
               if (redcnt > 2) {
                   clearInterval(IntervalID);
                   var tfiles = $("#tfiles").html();
                   if(tfiles == faileduploaded) { // break further processing all videos failed to upload
                   }
                   else if (filesuploaded >= tfiles) {
                       document.location = "&lt;%=ConfirmPageUrl %>?fn=" + filename + "&amp;gid=&lt;%=GalleryID %>&amp;uvids=" + $("#tfiles").html() + "&amp;mpid=" + $("#maxpid").html().trim() + "&lt;%=GroupParam %>";
                   }
           }
           }, 2000);
    }
    function EncodeVD(mid, mfile, msize) {
       var params = '&lt;%= EncodingParams %>&amp;fn=' + mfile;
           $.ajax({
               type: 'GET',
               url: '&lt;%= Encoding_Handler_Path %>',
               data: params,
               async: true,
               success: function (msg) {
                   if (msg == "Success" || msg == "") {
                       $('#' + mid).html('<strong>Uploading Completed Successfully - Wait for Processing.');
                   }
                   else {
                       failedstatus = 1;
                       faileduploaded++;
                       Display_Message('#' + mid, "Response is: " + msg, 0, 1);
                   }
               }
           });
       }
    </strong>

    Server side code for processing the file upload :

    private int MediaType = 0; // 0 : video, 1: audio

       public void ProcessRequest (HttpContext context) {
           try
           {
               context.Response.ContentType = "text/plain";
               context.Response.Write(ProcessMedia(context));
           }
           catch (Exception ex)
           {
               context.Response.Write("error|" + ex.Message);
           }
       }

       public string ProcessMedia(HttpContext context)
       {
           if (context.Request.Files.Count > 0)
           {
               int chunk = context.Request["chunk"] != null ? int.Parse(context.Request["chunk"]) : 0;
               string fileName = context.Request["name"] != null ? context.Request["name"] : string.Empty;
               //string _fileName = fileName.Remove(fileName.LastIndexOf(".")) + "-" + Guid.NewGuid().ToString().Substring(0, 6) + "" + fileName.Remove(0, fileName.LastIndexOf("."));
               HttpPostedFile fileUpload = context.Request.Files[0];

               string upath = "";
               if (context.Request.Headers["UName"] != null)
                   upath = context.Request.Headers["UName"].ToString();

               //if (CloudSettings.EnableCloudStorage &amp;&amp; upath != "")
               //    _fileName = upath.Substring(0, 3) + "-" + _fileName; // avoid duplication in cloud storage

               if (context.Request.Headers["MTP"] != null)
                   MediaType = Convert.ToInt32(context.Request.Headers["MTP"]);

               //string extensions = "";
               //if (MediaType == 0)
               //    extensions = Site_Settings.Video_Allowed_Formats;
               //else
               //    extensions = Site_Settings.Audio_Allowed_Formats;

               //bool sts = UtilityBLL.Check_File_Extension(extensions, fileName.ToLower());
               //if (sts == false)
               //{
               //    return "Invalid format, please upload proper video!"; // Invalid video format, please upload proper video
               //}

               int allowable_size_mb = 0;
               if (MediaType == 0)
               {
                   allowable_size_mb = Site_Settings.Video_Max_Size;
               }
               else
               {
                   allowable_size_mb = Site_Settings.Audio_Max_Size;
               }
               int UploadSize = allowable_size_mb * 1000000;
               if (fileUpload.ContentLength > UploadSize)
               {
                   return "Video Limit Exceeds";
               }

               string uploadPath = "";
               // check whether audio / mp3 encoding enabled
               if (this.MediaType == 1)
               {
                   // audio encoding
                   if (fileName.EndsWith(".mp3"))
                   {
                       // upload mp3 directly in mp3 path instead of default path
                       if (upath == "")
                           uploadPath = UrlConfig.MP3_Path(); // source video path
                       else
                           uploadPath = UrlConfig.MP3_Path(upath); // source video path
                   }
                   else
                   {
                       // default path
                       if (upath == "")
                           uploadPath = UrlConfig.Source_Video_Path(); // source video path
                       else
                           uploadPath = UrlConfig.Source_Video_Path(upath); // source video path
                   }
               }
               else
               {//azure
                   // default path
                   if (upath == "")
                       uploadPath = UrlConfig.Source_Video_Path(); // source video path
                   else
                       uploadPath = UrlConfig.Source_Video_Path(upath); // source video path
               }

               FileStream fs;
               using (fs = new FileStream(Path.Combine(uploadPath, fileName), chunk == 0 ? FileMode.Create : FileMode.Append))
               {
                   byte[] buffer = new byte[fileUpload.InputStream.Length];
                   fileUpload.InputStream.Read(buffer, 0, buffer.Length);

                   fs.Write(buffer, 0, buffer.Length);
               }
               return fileName; // "Success";
           }
           else
           {
               return "failed";
           }

           return "";
       }
       public bool IsReusable {
           get {
               return false;
           }
       }

    code in encode.aspx responsible for encoding the video :

    private string EncodeMedia(HttpContext context)
    {
       string sourcepath = "";
       string publishedpath = "";
       string mp3path = "";
       string thumbpath = "";
       if (this.UserName != "")
       {//azure
           sourcepath = UrlConfig.Source_Video_Path(this.UserName);
           publishedpath = UrlConfig.Published_Video_Path(this.UserName);
           mp3path = UrlConfig.MP3_Path(this.UserName);
           thumbpath = UrlConfig.Thumbs_Path(this.UserName);
       }
       else
       {
           sourcepath = UrlConfig.Source_Video_Path();
           publishedpath = UrlConfig.Published_Video_Path();
           mp3path = UrlConfig.MP3_Path();
           thumbpath = UrlConfig.Thumbs_Path();
       }
       if (this.FileName.EndsWith(".mp3") &amp;&amp; this.MediaType == 1)
       {
           // mp3 and audio format
           if (!File.Exists(mp3path + "/" + this.FileName))
           {
               return "Audio file not found!";
           }
       }
       else
       {
           // rest normal video and audio encoding
           if (!File.Exists(sourcepath + "/" + this.FileName))
           {
               return "Source file not found!";
           }
       }

       if (CloudSettings.EnableCloudStorage &amp;&amp; this.UserName != "")
           this.FileName = this.UserName.Substring(0, 3) + "-" + this.FileName; // avoid duplication in cloud storage


       //double f_contentlength = 0;
       //if (Site_Settings.Feature_Packages == 1)
       //{
       //    if (Config.GetMembershipAccountUpgradeType() != 1)
       //    {
       //        // Check whether user have enough space to upload content
       //        // Restriction only for normal or premium users
       //        f_contentlength = (double)fileUpload.ContentLength / 1000000;
       //        string media_field_name = "space_video";
       //        if (MediaType == 1)
       //            media_field_name = "space_audio";
       //        if (!User_PackagesBLL.Check_User_Space_Status(upath, media_field_name, f_contentlength) &amp;&amp; !isAdmin)
       //        {
       //            // insufficient credits to upload content
       //            return "Insufficient credits to upload media file"; //   Response.Redirect(Config.GetUrl("myaccount/packages.aspx?status=" + media_field_name), true);
       //        }
       //    }
       //}

       this.backgroundpublishing = true; // should be true on direct encoding
       // Video Processing
       string flv_filename = "";
       string original_filename = "";
       string thumb_filename = "";
       string duration = "";
       int duration_sec = 0;

       // set video actions : 1 -> on, 0 -> off
       int isenabled = 1;
       int ispublished = 1;
       int isreviewed = 1;
       int isresponse = 0;
       if (Response_VideoID > 0)
           isresponse = 1;

       string flv_url = "none";
       string thumb_url = "none";
       string org_url = "none";
       string _embed = "";

       string errorcode = "0";
       VideoInfo info = null;

       if (Site_Settings.Content_Approval == 0)
           isreviewed = 0;


       // check whether audio / mp3 encoding enabled
       if (this.FileName.EndsWith(".mp3") &amp;&amp; this.MediaType==1)
       {
           // audio encoding
           // mp3 file already
           // so no encoding happens
           MediaHandler _minfo = new MediaHandler();
           _minfo.FFMPEGPath = Encoding_Settings.FFMPEGPATH;
           _minfo.FileName = FileName;
           _minfo.InputPath = mp3path;
           info = _minfo.Get_Info();

           flv_filename = FileName;
           original_filename = FileName;
           duration = info.Duration;
           duration_sec = info.Duration_Sec;
           isenabled = 1; // enabled
       }
       else if (this.directpublishing)
       {            

           // publish video
           ArrayList itags = new ArrayList();
           MHPEncoder encoder = new MHPEncoder();
           //if (this.FileName.EndsWith(".mpeg") || this.FileName.EndsWith(".mpg")) // use mpg compatible ffmpeg encoder
           //    encoder.FfmpegPath = HttpContext.Current.Server.MapPath(HttpContext.Current.Request.ApplicationPath) + "\\ffmpeg\\ffmpegbk\\ffmpeg.exe";
               //encoder.ThumbFfmpegPath = Encoding_Settings.FFMPEGPATH; // use normal ffmpeg encoder for thumbs processing

           //azure
           encoder.FfmpegPath = Encoding_Settings.FFMPEGPATH; // use normal ffmpeg encoder
           encoder.FlvToolPath = Encoding_Settings.FLVTOOLPATH; // set meta information for flv videos
           encoder.Mp4BoxPath = Encoding_Settings.MP4BoxPath; // set meta information for mp4 videos
           encoder.SourcePath = sourcepath;
           encoder.SourceFileName = this.FileName;

           // No cloud storage on direct encoding
           //if (CloudSettings.EnableCloudStorage)
           //    encoder.EnableCloudStorage = true;


           if (MediaType == 1)
           {
               // audio encoding
               itags.Add("14");
               encoder.iTags = itags;
               encoder.GrabThumbs = false;
               encoder.PublishedPath = mp3path;

               //_vprocess.OutputPath = this.MP3Path;
               //_vprocess.isAudio = true;
           }
           else
           {
               // video encoding
               itags.Add(EncoderSettings.DefaultITagValue.ToString()); // 5 for 360p mp4 encoding    
               //itags.Add(7);   // this will call 7 case settings to publish next video ending with _7.mp4 instead of _5.mp4
               // so there will be 2 videos with different resoultions published at the end of the process?
               // yesmake sure use proper settings first test it directly via command.    
               //okay i got it. But i'm gonna have to use a different media players to incroporate those settings
               // once published you can load different videos for different user by checking _7.mp4 (end) va
              //okay got it.

               //azure
               encoder.PublishedPath = publishedpath;
               encoder.iTags = itags;
               encoder.ThumbsDirectory = thumbpath;
               encoder.TotalThumbs = 15;

               //_vprocess.ThumbPath = this.ThumbPath;
               //_vprocess.OutputPath = this.FLVPath;
               //if (Config.isPostWaterMark())
               //{
               //    // script for posting watermark on video
               //    _vprocess.WaterMarkPath = Server.MapPath(Request.ApplicationPath) + "\\contents\\watermark";
               //    _vprocess.WaterMarkImage = "watermark.gif";

               //}
           }
           int deleteoption = Site_Settings.Video_Delete_Original;
           if (deleteoption == 1)
           {
               encoder.DeleteSource = true;
           }
           // background processing
           if (this.backgroundpublishing &amp;&amp; this.MediaType==0)
           {
               encoder.BackgroundProcessing = true;
               // get information from source video in order to store it in database
               MediaHandler _minfo = new MediaHandler();
               //if (this.FileName.EndsWith(".mpeg") || this.FileName.EndsWith(".mpg")) // use mpg compatible ffmpeg encoder
               //    encoder.FfmpegPath = HttpContext.Current.Server.MapPath(HttpContext.Current.Request.ApplicationPath) + "\\ffmpeg\\ffmpegbk\\ffmpeg.exe";
               //else
                   _minfo.FFMPEGPath = Encoding_Settings.FFMPEGPATH;

               _minfo.FileName = FileName;
               _minfo.InputPath = sourcepath;
               info = _minfo.Get_Info();
           }
           // encode video processing
           Video_Information vinfo = encoder.Process();
           if (vinfo.ErrorCode > 0)
           {
               errorcode = vinfo.ErrorCode.ToString();
               ErrorLgBLL.Add_Log("Encoding Failed Log", "", "encoding error: " + vinfo.ErrorCode.ToString() + "<br />Description: " + vinfo.ErrorDescription.ToString());
                //return vinfo.ErrorDescription;
           }
           // Double check validation
           // if published video exist
           // if thumb exist
           // then proceed further

           if (MediaType == 0)
           {
               if (!File.Exists(encoder.PublishedPath + "/" + vinfo.FLVVideoName))
               {
                   return "Video failed to published properly.";
               }
               if (!File.Exists(encoder.ThumbsDirectory + "/" + vinfo.ThumbFileName))
               {
                   return "Thumbs failed to grab from video properly.";
               }
           }
           else
           {
               if (vinfo.FLVVideoName == "")
               {
                   vinfo.FLVVideoName = this.FileName.Remove(this.FileName.LastIndexOf(".")) + "_14.mp3"; // mp3 file path name
               }
               if (!File.Exists(encoder.PublishedPath + "/" + vinfo.FLVVideoName))
               {
                   return "Audio failed to published properly.";
               }
           }
           // Now thumbs and video published, procceed for data processing
           // get information from vinfo object
           if (this.backgroundpublishing &amp;&amp; this.MediaType == 0)
           {
               string OutputFileName = this.FileName.Remove(this.FileName.LastIndexOf("."));
               flv_filename = OutputFileName + "_" + EncoderSettings.DefaultITagValue + "." + EncoderSettings.Return_Output_Extension(EncoderSettings.DefaultITagValue);
               original_filename = vinfo.OriginalVideoName;
               thumb_filename = OutputFileName + "_008.jpg"; // info.ThumbFileName;
               duration = info.Duration;
               duration_sec = info.Duration_Sec;
           }
           else
           {
               flv_filename = vinfo.FLVVideoName;
               original_filename = vinfo.OriginalVideoName;
               thumb_filename = vinfo.ThumbFileName;
               duration = vinfo.Duration;
               duration_sec = vinfo.Duration_Sec;
               isenabled = vinfo.isEnabled;
           }

           // No cloud storage on direct encoding.
           // Note cloude storage only works if background processing is disabled
           // Or works in cased of sheduled processing
           if (CloudSettings.EnableCloudStorage &amp;&amp; errorcode == "0")
           {
               flv_url = "amazon";
               org_url = "https://s3.amazonaws.com/" + CloudSettings.OriginalVideoBucketName + "/" + this.FileName;
               thumb_url = "https://s3.amazonaws.com/" + CloudSettings.ThumbsBucketName + "/" + thumb_filename;

           }

       }
       else
       {
           // set publishing status off.
           ispublished = 0;
           original_filename = this.FileName;
       }

       // Store video information in database
       string ipaddress = context.Request.ServerVariables["REMOTE_ADDR"].ToString();

       // Store media information in database
       Video_Struct vd = new Video_Struct();
       vd.CategoryID = 0; // store categoryname or term instead of category id
       vd.Categories = Categories;
       vd.UserName = UserName;
       vd.Title = "";
       vd.Description = "";
       vd.Tags = Tags;
       vd.Duration = duration;
       vd.Duration_Sec = duration_sec;
       vd.OriginalVideoFileName = original_filename;
       vd.VideoFileName = flv_filename;
       vd.ThumbFileName = thumb_filename;
       vd.isPrivate = Privacy;
       vd.AuthKey = PAuth;
       vd.isEnabled = isenabled;
       vd.Response_VideoID = Response_VideoID; // video responses
       vd.isResponse = isresponse;
       vd.isPublished = ispublished;
       vd.isReviewed = isreviewed;
       vd.FLV_Url = flv_url;
       vd.Thumb_Url = thumb_url;
       vd.Org_Url = org_url;
       vd.Embed_Script = _embed;
       vd.isExternal = 0; // website own video, 1: embed video
       vd.IPAddress = ipaddress;
       vd.Type = MediaType;
       vd.YoutubeID = "";
       vd.isTagsreViewed = 1;
       vd.Mode = 0; // filter videos based on website sections
       //vd.ContentLength = f_contentlength;
       vd.GalleryID = GID;
       vd.ErrorCode = Convert.ToInt32(errorcode);
       long videoid = VideoBLL.Process_Info(vd, false);

       // Process tags
       if (Tags != "")
       {
           int tag_type = 0; // represent videos
           if (MediaType == 1)
               tag_type = 4; // represent audio file
           TagsBLL.Process_Tags(Tags, tag_type, 0);
       }

       if (Response_VideoID > 0)
       {
           VideoBLL.Update_Responses(Response_VideoID);
       }

       return "Success";
    }
  • python ff-mpeg not working on VM

    2 août 2013, par Bob

    I have two Windows 2008 R2 64 bit servers with two different host providers (GoDaddy and company B). My python script runs successfully on GoDaddy's server. It doesn't run successfully on the server with company B.

    I installed the same software on both servers :

    • Python 2.7 for Windows 32 bit
    • NumPY module
    • SetupTools
    • EchoNest API for Windows

    The company B server is giving me an error related to an executable called en-ffmpeg.exe that uses the python ff-mpeg module. The exact error message is

    [dv @ 0x1449690]Can't determine profile of DV input stream.
    C :\Music\song1.mp3 : Error while opening file

    The song.mp3 file exists. I installed the latest Windows updates on the server with Company B but still I get the error. I believe the error is because something is not configured properly on this server (missing libraries or drivers ?). However, I don't know what that is !

    Please help :)

    UPDATED TO INCLUDE COMMAND AND ERROR OUTPUT FROM FFMPEG

    COMMAND :

    c :\Python27>en-ffmpeg -i "C :\Music\song1.mp3" -y -ac 2 -ar 44100
    "c :\users\x07 dmini 1\x07ppdata\local\temp\x02\tmpax82jf.wav"

    FULL ERROR :

    FFmpeg version SVN-r17988-Komeil, Copyright (c) 2000-2009 Fabrice Bellard, et al
    .
     configuration: --enable-memalign-hack --extra-cflags=-fno-common --enable-stat
    ic --disable-shared --disable-debug --enable-gpl --enable-nonfree --enable-avfil
    ter --enable-avfilter-lavf --enable-avisynth --enable-postproc --enable-pthreads
    --enable-libamr-nb --enable-libamr-wb --enable-libgsm --enable-libfaac --enable
    -libfaad --enable-libmp3lame --enable-libschroedinger --enable-libspeex --enable
    -libtheora --enable-libvorbis --enable-libx264 --enable-libxvid
     libavutil     50. 0. 0 / 50. 0. 0
     libavcodec    52.21. 0 / 52.21. 0
     libavformat   52.31. 1 / 52.31. 1
     libavdevice   52. 1. 0 / 52. 1. 0
     libavfilter    0. 4. 0 /  0. 4. 0
     libswscale     0. 7. 1 /  0. 7. 1
     libpostproc   51. 2. 0 / 51. 2. 0
     built on Mar 15 2009 18:16:31, gcc: 4.3.0 20080305 (alpha-testing) mingw-20080
    502
    [dv @ 0x1449690]Can&#39;t determine profile of DV input stream.
    C:\\Music\\song1.mp3: Error while opening file

    I also tried removing the double back slashes from the command but got the same error.

  • Cannot save animation in matplotlib : Windows permission denied

    13 mai 2015, par Vladimir

    I’ve been trying for a day long to sort this out, checking similar threads but with no success.
    Stretch’s Cannot save matplotlib animation with ffmpeg helped with previous errors (I had ffmpeg path wrong), but I kept getting Access denied after fixing it.

    My ffmpeg binary is on C:\ffmpeg\bin

    A nice alternative would be to able to export gif files, but I keep getting an ascii error with imagemagick. I think both problems are related, so I wanted to sort out the ffmpeg first.

    I think the problem might have to do with the fact I’m working with Canopy (in Windows 8 64bit), which pretty much hegemonized my path variable and broke some things along the way (e.g. I can’t open IDLE since I installed Canopy, didn’t tried to fix that yet). As I fixed things along the way I found at least 3 distinct path variables, all of which I updated : windows advanced settings path (set manually), windows console path (set via console with setx), and sys.path (set or checked at runtime), adding ";C:\ffmpeg\bin", where ffmpeg effectively is. Regardless I sort out the problem or not, I would like to learn which of these environment variables are relevant for what, I find it very confusing.

    The code is the following :

    # -*- coding: utf-8 -*-
    import sys
    import numpy as np
    from matplotlib import pyplot as plt
    from matplotlib import animation
    plt.rcParams['animation.ffmpeg_path'] = r'C:\ffmpeg\bin'
    if r'C:\ffmpeg\bin' not in sys.path: sys.path.append(r'C:\ffmpeg\bin')

    fig = plt.figure()
    ax = plt.axes(xlim=(0, 2), ylim=(-2, 2))
    line, = ax.plot([], [], lw=2)

    def init():
       line.set_data([], [])
       return line,

    def animate(i):
       x = np.linspace(0, 2, 1000)
       y = np.sin(2 * np.pi * (x - 0.01 * i))
       line.set_data(x, y)
       return line,

    anim = animation.FuncAnimation(fig, animate, init_func=init, frames=200, interval=20, blit=True)
    plt.show()

    # This case generates Windows err: Access Denied
    FFwriter = animation.FFMpegWriter()
    # anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30)

    # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3
    # anim.save(r'C:\animation.gif', writer='imagemagick', fps=30)

    The traceback for anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30) :

    %run "C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py"
    ---------------------------------------------------------------------------
    WindowsError                              Traceback (most recent call last)
    C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py in <module>()
        27 # This case generates Windows err: Access Denied
        28 FFwriter = animation.FFMpegWriter()
    ---> 29 anim.save(r'C:\basic_animation.mp4', writer = FFwriter, fps=30)
        30
        31 # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs)
       759         # since GUI widgets are gone. Either need to remove extra code to
       760         # allow for this non-existant use case or find a way to make it work.
    --> 761         with writer.saving(self._fig, filename, dpi):
       762             for data in zip(*[a.new_saved_frame_seq()
       763                               for a in all_anim]):

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\contextlib.pyc in __enter__(self)
        15     def __enter__(self):
        16         try:
    ---> 17             return self.gen.next()
        18         except StopIteration:
        19             raise RuntimeError("generator didn't yield")

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in saving(self, *args)
       184         '''
       185         # This particular sequence is what contextlib.contextmanager wants
    --> 186         self.setup(*args)
       187         yield
       188         self.finish()

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in setup(self, fig, outfile, dpi, *args)
       174         # Run here so that grab_frame() can write the data to a pipe. This
       175         # eliminates the need for temp files.
    --> 176         self._run()
       177
       178     @contextlib.contextmanager

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in _run(self)
       202                                       stdout=output, stderr=output,
       203                                       stdin=subprocess.PIPE,
    --> 204                                       creationflags=subprocess_creation_flags)
       205
       206     def finish(self):

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\subprocess.pyc in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags)
       707                                 p2cread, p2cwrite,
       708                                 c2pread, c2pwrite,
    --> 709                                 errread, errwrite)
       710         except Exception:
       711             # Preserve original exception in case os.close raises.

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\App\appdata\canopy-1.5.2.2785.win-x86_64\lib\subprocess.pyc in _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, to_close, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
       955                                          env,
       956                                          cwd,
    --> 957                                          startupinfo)
       958             except pywintypes.error, e:
       959                 # Translate pywintypes.error to WindowsError, which is

    WindowsError: [Error 5] Acceso denegado
    </module>

    The traceback for anim.save(r'C:\animation.gif', writer='imagemagick', fps=30) :

    In [8]: %run "C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py"
    ---------------------------------------------------------------------------
    UnicodeDecodeError                        Traceback (most recent call last)
    C:\Users\Yahveh\Documents\Vlad\Investigacion\animation saving.py in <module>()
        30
        31 # This case generates UnicodeDecodeError:'ascii' codec can't decode byte 0xa0 in position 3
    ---> 32 anim.save(r'C:\animation.gif', writer='imagemagick', fps=30)

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in save(self, filename, writer, fps, dpi, codec, bitrate, extra_args, metadata, extra_anim, savefig_kwargs)
       765                     # TODO: Need to see if turning off blit is really necessary
       766                     anim._draw_next_frame(d, blit=False)
    --> 767                 writer.grab_frame(**savefig_kwargs)
       768
       769         # Reconnect signal for first draw if necessary

    C:\Users\Yahveh\AppData\Local\Enthought\Canopy\User\lib\site-packages\matplotlib\animation.pyc in grab_frame(self, **savefig_kwargs)
       225             verbose.report('MovieWriter -- Error '
       226                            'running proc:\n%s\n%s' % (out,
    --> 227                                                       err), level='helpful')
       228             raise
       229

    UnicodeDecodeError: 'ascii' codec can't decode byte 0xa0 in position 3: ordinal not in range(128)
    </module>

    Stared at them for a while.

    Thanks for your time !

    UPDATE : I followed the steps in this post for granting access to both C :\ffmpeg and destination folder, but no luck :(