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Autres articles (72)

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Sur d’autres sites (12116)

  • OpenCV and Cloud Cameras

    8 mai 2014, par Alexander

    So as a bit of context ; this program was built originally to work with USB cameras - but a few things changed. I’m trying to convert it to work with networked cameras, but my presence here should make it quite apparent what my level of success has been. I still consider myself somewhat new at programming, and definately new at visual processing/OpenCV - so please forgive a few blunders if I make them. I’m going to try to provide as much detail as possible, so apologies for the length below.


    I’m using :

    • OpenCV 2.4.6.0
    • Microsoft Visual Studio Express 2012
    • C++
    • D-Link Cloud Camera 7100

    I am trying to access the DLink camera’s video feed through OpenCV.

    I can access the camera through it’s IP address with a browser without any issues. Unfourtunately ; my program is less cooperative. I’ve put it on two computers (excluding the computer it gets compiled on, which for unrelated/unchangable reasons cannot be placed on the same network the network camera is on) which both fail to grant my program access to the camera. One computer gives the OpenCV-generated error :

    warning : Error opening file (../../modules/highgui/src/cap_ffmpeg_impl.hpp:529)

    This error occurs with just about everything I try that doesn’t somehow generate more problems. The other computer (same code) generates no such error - it just doesn’t get the camera’s output either.

    For reference - the code in OpenCV’s cap_ffmpeg_impl.hpp around line 529 is as follows :

    522    bool CvCapture_FFMPEG::open( const char* _filename )
    523    {
    524        unsigned i;
    525        bool valid = false;
    526
    527        close();
    528
    529    #if LIBAVFORMAT_BUILD >= CALC_FFMPEG_VERSION(52, 111, 0)
    530        int err = avformat_open_input(&ic, _filename, NULL, NULL);
    531    #else
    532        int err = av_open_input_file(&ic, _filename, NULL, 0, NULL);
    533    #endif
    ...
    616    }

    ...for which I have no idea what I’m looking at.

    My entire program is rather large, so I’m editing it down as much as possible to help keep this readable - if I miss something you think is important please leave a comment telling me as much so I can throw it in...

    First up - this is one of the first things in main() so I don’t have to recompile every time I want to try a different value :

    3380    cout << "Please Enter Video Location: ";
    3381    cin >> videoFeedAddress;
    3382    cout << "videoFeedAddress: " << videoFeedAddress << endl;

    Just a simple string value.
    Next up - the actual place we’re having the problem ! Probably...

    Note that in the below code - if networkCam is false and a USB camera is connected there is no problem. The error here is caused by line 153.

    121    void displayCameraView()
    122    {
    123     if(camviewOn) // displayCameraView is triggered by a button the user can press as often as they want. Doesn't mean we want to let them break everything.
    124     {return;}
    125     else
    126     {
    127         CvCapture* cv_cap;
    128         VideoCapture cv_cap_IP;
    129         Mat color_img_IP;
    130         camviewOn = true;
    131         int capture;
    132         IplImage* color_img;
    133         if(!networkCam)
    134         {
    135             cv_cap = cvCaptureFromCAM(0);
    136             Sleep(100);
    137             if(!cv_cap)
    138             {
    139                 setExitError(1002);
    140                 if(textOutput){cout << "Video Error: Video input will not work.\n";}
    141                 MessageBox(hwnd, "Error opening camera.", "Error", MB_ICONEXCLAMATION);
    142                 cvReleaseCapture( &cv_cap );
    143                 cvDestroyWindow("Camera View");
    144                 return;
    145             }
    146             color_img = cvQueryFrame(cv_cap);
    147             clickPointStorage.create(((Mat)color_img).rows, ((Mat)color_img).cols, CV_8UC3);
    148         }
    149         else
    150         {
    151             ///*\
    152            
    153             cv_cap_IP.open(videoFeedAddress);
    154             Sleep(100);
    155             if(!cv_cap_IP.isOpened())
    156             {
    157                 setExitError(1002);
    158                 if(textOutput){cout << "Video Error: Video input will not work.\n";}
    159                 MessageBox(hwnd, "Error opening camera.", "Error", MB_ICONEXCLAMATION);
    160                 cvDestroyWindow("Camera View");
    161                 return;
    162             }
    163             clickPointStorage.create(color_img_IP.rows, color_img_IP.cols, CV_8UC3);
    164    
    165             //\*/
    166         }
    167         clickPointStorage.setTo(Scalar(0, 0, 0));
    168         cvNamedWindow("Camera View", 0); // create window
    169         cvSetMouseCallback("Camera View", CallBackFunc, NULL);
    170         IplImage* IplClickPointStorage = new IplImage(clickPointStorage);
    171         IplImage* Ipl_IP_Img;
    172        
    173         if(!networkCam)
    174         {
    175             for(;;)
    176             {
    177                 IplClickPointStorage = new IplImage(clickPointStorage);
    178                 cvAdd(cvQueryFrame(cv_cap), IplClickPointStorage, color_img); // get frame
    181                 cvShowImage("Camera View", color_img); // show frame
    182                 capture = cvWaitKey(10); // wait 10 ms or for key stroke
    183                 if(capture == 27 || capture == 13 || capture == 32){break;} // if ESC, Return, or space; close window.
    184             }
    185             /* clean up */
    186             cvReleaseCapture( &cv_cap );
    187             delete cv_cap;
    188             delete IplClickPointStorage;
    189         }
    190         else
    191         {
    192             ///*\
    193    
    194             for(;;)
    195             {
    196                 cv_cap_IP.read(color_img_IP);
    197                 IplClickPointStorage = new IplImage(clickPointStorage);
    198                 Ipl_IP_Img = new IplImage(color_img_IP);
    199                 cvAdd(Ipl_IP_Img, IplClickPointStorage, color_img);
    200                 cvShowImage("Camera View", color_img); // show frame
    201                 capture = cvWaitKey(10); // wait 10 ms or for key stroke
    202                 if(capture == 27 || capture == 13 || capture == 32){break;} // if ESC, Return, or space; close window.
    203             }
    204             cv_cap_IP.release();
    205             delete Ipl_IP_Img;
    206             delete IplClickPointStorage;
    207    
    208             //\*/
    209         }
    210         cvDestroyWindow("Camera View");
    211         camviewOn = false;
    212     }
    213     return;
    214    }

    As I said, on one computer I get the above error - both of them give me my own error from here :

    155             if(!cv_cap_IP.isOpened())
    156             {
    157                 setExitError(1002);
    158                 if(textOutput){cout << "Video Error: Video input will not work.\n";}
    159                 MessageBox(hwnd, "Error opening camera.", "Error", MB_ICONEXCLAMATION);
    160                 cvDestroyWindow("Camera View");
    161                 return;
    162             }

    ...which of course tells me cv_cap_IP is not open. One of my primary concerns is with the videoFeedAddress variable. No value I enter seems to get a different result.

    I searched the Googles - and come across a number of different "possible" answers - but none of them seem to work for me. If you attempt to google it yourself you may come across some of these :

    1. This is one of the first configurations my code was in. No dice.
    2. This one is talking about files - not cameras. It also mentions codecs - but I wouldn’t be able to watch it in a web browser if that were the problem, right ? (Correct me if I’m wrong here...)
    3. This one has the wrong error code/points to the wrong line of code !
    4. This one mentions compiling OpenCV with ffmpeg support - but I believe 2.4.6.0 already comes with that all set and ready ! Otherwise it’s not that different from what I’ve already tried.
    5. Now THIS one appears to be very similar to what I have, but the only proposed solution doesn’t really help as I had already located a list of connections. I do not believe this is a duplicate, because as per THIS meta discussion I had a lot more information and so didn’t feel comfortable taking over someone else’s question - especially if I end up needing to add even more information later.

    Back to the videoFeedAddress variable : I found THIS site that lists a number of possible addresses to connect to it. since there exists no 7100 anywhere in the list - and the install is the same for the DCS-7010L I used the addresses found next to the DCS-7010L listings. Most of them can be reached through the browser, confirming that they reach the camera - but they don’t seem to affect the outcome when I change them.

    As per many of the above links, I’ve tried many of them both with any without username:password, port number (554), and variations on ?.mjpg (the format) at the end.

    Any ideas ?

  • Compress video with ffmpeg4android library

    30 mars 2015, par Huy Tower

    I tried to follow ffmpeg4android library, and I get the problem when compressing the video, as the Log image below.

    I use intent to transfer to Compressing Media class,

    Intent intent = new Intent(this, CompressingMedia.class);
    intent.putExtra("file_path", mLlItems.get(0).getPath());
    startActivity(intent);

    This is the class was transfered to :

    public class CompressingMedia extends BaseWizard {

    @Override
    public void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);

       Intent intent = getIntent();

       Log.d(Prefs.TAG, "path " + intent.getExtras().getString("file_path"));
       // /storage/emulated/0/DCIM/Camera/VID_20140312_090612.mp4

       String command = "ffmpeg -y -i " + intent.getExtras().getString("file_path") +
               " -strict experimental -s 320x240 -r 15 -aspect 3:4 -ab 12288 -vcodec mpeg4 -b 2097152 -sample_fmt s16 /sdcard/out.mp4";

       // if you want to change the default work location (/sdcard/videokit/) use the uncomment the below method.
       // It must be defined before calling the copyLicenseAndDemoFilesFromAssetsToSDIfNeeded method,
       // in order for this method to copy the assets to the correct location.
               //      setWorkingFolder("/sdcard/videokit/");

       // this will copy the license file and the demo video file.
       // to the videokit work folder location.
       // without the license file the library will not work.
       copyLicenseAndDemoFilesFromAssetsToSDIfNeeded();

       commandStr = command;
       setCommand(commandStr);

       runTranscoing();
       }
    }

    Although I received the notification Transcoding Successfully, but it looks like the capacity of file after compressing is always be 0. (the log in the bottom of images)

    I don’t know the result as image below is good or not, I can not get the expected result - The video was compressed totally successfully.

    Someone know why after compressing the file is always be 0, please tell me. Thanks.

    This is the Log Cat :

    03-13 14:49:45.655 : I/ActivityManager(6065) : Timeline :
    Activity_launch_request id:app.cloudstringers time:38212359

    03-13 14:49:45.665 : V/Home(6065) : Global ID is 000400010007 ;Sell is 3

    03-13 14:49:45.770 : D/ffmpeg4android(6065) : path
    /storage/emulated/0/videokit/out.mp4

    03-13 14:49:45.770 : I/ffmpeg4android(6065) : workingFolderPath :
    /sdcard/videokit/

    03-13 14:49:45.775 : D/ffmpeg4android(6065) : Working directory exists,
    not coping assests (license file and demo videos)

    03-13 14:49:45.785 : D/ffmpeg4android(6065) : output directory exists.

    03-13 14:49:45.785 : I/ffmpeg4android(6065) : Command is set

    03-13 14:49:45.785 : I/ffmpeg4android(6065) : set
    remoteNotificationIconId : 0

    03-13 14:49:45.785 : D/ffmpeg4android(6065) : Client Cannot unbind -
    service not bound

    03-13 14:49:45.785 : D/ffmpeg4android(6065) : Client stopService()

    03-13 14:49:45.790 : W/ContextImpl(6065) : Implicit intents with
    startService are not safe : Intent
    act=com.netcompss.ffmpeg4android.FFMpegRemoteServiceBridge

    android.content.ContextWrapper.stopService:499
    com.netcompss.ffmpeg4android_client.BaseWizard.stopService:451
    com.netcompss.ffmpeg4android_client.BaseWizard.runTranscoing:285

    03-13 14:49:45.795 : I/ffmpeg4android(6065) :
     !!!!!!!!!!!!!!!!!!services.size() : 1

    03-13 14:49:45.795 : I/ffmpeg4android(6065) : putting Base categoty

    03-13 14:49:45.810 : D/ffmpeg4android(6065) : started :
    com.netcompss.ffmpeg4android.FFMpegRemoteServiceBridge

    03-13 14:49:45.810 : D/ffmpeg4android(6065) : Client startService()

    03-13 14:49:45.810 : D/ffmpeg4android(6065) : bindService() called

    03-13 14:49:45.815 : W/ContextImpl(6065) : Implicit intents with
    startService are not safe : Intent
    act=com.netcompss.ffmpeg4android.FFMpegRemoteServiceBridge

    android.content.ContextWrapper.bindService:517
    com.netcompss.ffmpeg4android_client.BaseWizard.bindService:462
    com.netcompss.ffmpeg4android_client.BaseWizard.runTranscoing:288

    03-13 14:49:45.820 : D/ffmpeg4android(6065) : Client bindService()

    03-13 14:49:45.935 : I/ffmpeg4android(6616) : =======service onCreate() :
    Stopping forground (to overcome 2.3.x bug)

    03-13 14:49:45.935 : I/ffmpeg4android(6616) : =======service
    onBind()=======

    03-13 14:49:45.940 : I/ffmpeg4android(6616) : ===onStartCommand called

    03-13 14:49:45.940 : I/ffmpeg4android(6616) : ===onStartCommand cat :
    Base

    03-13 14:49:45.940 : D/ffmpeg4android(6616) : onStartCommand,
    START_STICKY, base Command

    03-13 14:49:45.955 : I/ffmpeg4android(6616) : get
    remoteNotificationIconId : 0

    03-13 14:49:45.955 : I/ffmpeg4android(6616) : notifIcon is set

    03-13 14:49:45.955 : I/ffmpeg4android(6616) : Start RemoteService with
    notification id : 5326

    03-13 14:49:45.965 : I/ffmpeg4android(6616) : Run called.

    03-13 14:49:45.965 : D/ffmpeg4android(6616) : Sleeping, waiting for
    command

    03-13 14:49:45.970 : D/ffmpeg4android(6065) : Client
    onServiceConnected()

    03-13 14:49:45.970 : I/ffmpeg4android(6065) : invokeService called

    03-13 14:49:45.970 : I/Videokit(6065) : licenseCheck in path :
    /sdcard/videokit

    03-13 14:49:45.970 : I/Videokit(6065) : isLicExistsComplex...

    03-13 14:49:45.970 : I/Videokit(6065) : trying to open
    /sdcard/videokit/ffmpeglicense.lic

    03-13 14:49:45.970 : I/Videokit(6065) : license file found...

    03-13 14:49:45.970 : I/Videokit(6065) : time decoded : 1394535283

    03-13 14:49:45.970 : I/Videokit(6065) : timeStrDec 1394535283 is a valid
    number.

    03-13 14:49:45.970 : I/Videokit(6065) : time diff : 161702

    03-13 14:49:45.970 : I/Videokit(6065) : You used 1 of your 15 trial
    days.

    03-13 14:49:45.970 : I/ffmpeg4android(6065) : setting remote
    notification info

    03-13 14:49:45.970 : D/ffmpeg4android(6616) : command items num : 21

    03-13 14:49:45.970 : D/ffmpeg4android(6616) : command : ffmpeg -y -i
    /storage/emulated/0/videokit/out.mp4 -strict experimental -s 320x240
    -r 15 -aspect 3:4 -ab 12288 -vcodec mpeg4 -b 2097152 -sample_fmt s16 /sdcard/out.mp4

    03-13 14:49:45.970 : D/ffmpeg4android(6616) : workingFolder from remote :
    /sdcard/videokit

    03-13 14:49:45.970 : D/ffmpeg4android(6065) : deleteing :
    /sdcard/videokit/vk.log isdeleted : true

    03-13 14:49:45.975 : D/ffmpeg4android(6065) : deleteing :
    /sdcard/videokit/ffmpeg4android.log isdeleted : false

    03-13 14:49:45.975 : D/ffmpeg4android(6065) : deleteing :
    /sdcard/videokit/videokit.log isdeleted : true

    03-13 14:49:45.980 : D/ffmpeg4android(6065) : Client invokeService()

    03-13 14:49:45.980 : D/ffmpeg4android(6065) : Acquire wake lock

    03-13 14:49:46.265 : D/ffmpeg4android(6616) : Sleeping, waiting for
    command

    03-13 14:49:46.295 : D/ffmpeg4android(6065) : TranscodeBackground
    doInBackground started

    03-13 14:49:46.295 : I/ffmpeg4android(6616) : =======remote service
    runTranscoding ======

    03-13 14:49:46.340 : V/HomeAsync(6065) : TOTAL_SPACE is
    1 ;AVAILABLE_SPACE is 0.451

    03-13 14:49:46.345 : I/ActivityManager(6065) : Timeline : Activity_idle
    id : android.os.BinderProxy@423deed8 time:38213045

    03-13 14:49:46.345 : I/ActivityManager(6065) : Timeline : Activity_idle
    id : android.os.BinderProxy@420323a0 time:38213045

    03-13 14:49:46.565 : D/dalvikvm(6616) : Trying to load lib
    /data/app-lib/app.cloudstringers-2/libvideokit.so 0x41b285f0

    03-13 14:49:46.570 : D/dalvikvm(6616) : Added shared lib
    /data/app-lib/app.cloudstringers-2/libvideokit.so 0x41b285f0

    03-13 14:49:46.570 : I/Videokit(6616) : Loading native library compiled
    at 21:59:53 Oct 23 2013

    03-13 14:49:46.575 : I/ffmpeg4android(6616) : ===============Running
    command from thread path : /sdcard/videokit

    03-13 14:49:46.575 : I/Videokit(6616) : vk ffmpeg sdcardPath :
    /sdcard/videokit

    03-13 14:49:46.575 : I/Videokit(6616) : licenseCheck in path :
    /sdcard/videokit

    03-13 14:49:46.575 : I/Videokit(6616) : isLicExistsComplex...

    03-13 14:49:46.575 : I/Videokit(6616) : trying to open
    /sdcard/videokit/ffmpeglicense.lic

    03-13 14:49:46.575 : I/Videokit(6616) : license file found...

    03-13 14:49:46.575 : I/ffmpeg4android(6616) :
    =======ProgressBackgroundRemote doInBackground=========

    03-13 14:49:46.575 : I/Videokit(6616) : time decoded : 1394535283

    03-13 14:49:46.575 : I/Videokit(6616) : timeStrDec 1394535283 is a valid
    number.

    03-13 14:49:46.575 : I/Videokit(6616) : time diff : 161703

    03-13 14:49:46.575 : I/Videokit(6616) : You used 1 of your 15 trial
    days.

    03-13 14:49:46.575 : D/Videokit(6616) : license check rc : 0

    03-13 14:49:46.575 : D/Videokit(6616) : run() called verion 2.0

    03-13 14:49:46.575 : D/Videokit(6616) : run passing off to main()

    03-13 14:49:46.800 : D/ffmpeg4android(6065) : onServiceDisconnected

    03-13 14:49:48.640 : I/ffmpeg4android(6065) : Got real duration :
    00:00:07.78

    03-13 14:49:48.640 : I/ffmpeg4android(6065) : ==== getting
    currentVkLogSize from VK

    03-13 14:49:48.640 : D/ffmpeg4android(6065) : currentVkLogSize : 5751

    03-13 14:49:48.645 : I/ffmpeg4android(6065) : No ffmpeg4android_log
    file, using vk log

    03-13 14:49:48.645 : I/line(6065) : _rate, rate, width or height

    03-13 14:49:48.650 : I/line(6065) : Statistics : 0 seeks, 0 writeouts

    03-13 14:49:48.650 : I/line(6065) : Statistics : 72873 bytes read, 2
    seeks

    03-13 14:49:48.650 : D/ffmpeg4android(6065) : currentTimeStr : exit

    03-13 14:49:48.650 : D/ffmpeg4android(6065) : ============Found one of
    the exit tokens in the log============

    03-13 14:49:48.650 : I/ffmpeg4android(6065) : onProgressUpdate : 100

    03-13 14:49:48.650 : D/ffmpeg4android(6065) : Releasing wake lock

    03-13 14:49:48.650 : D/ffmpeg4android(6065) : TranscodeBackground
    onPostExecute

    03-13 14:49:48.700 : D/ffmpeg4android(6065) : /sdcard/videokit/null
    length in bytes : 0

    03-13 14:49:48.700 : D/ffmpeg4android(6065) : showNotifications

    03-13 14:49:48.700 : W/ffmpeg4android(6065) : output file is not set use
    the setOutputFilePath method to set the full output file path

    03-13 14:49:48.705 : I/ffmpeg4android(6065) : FFMPEG finished.

    03-13 14:49:48.710 : D/ffmpeg4android(6065) : releaseService()

    03-13 14:49:48.710 : D/ffmpeg4android(6065) : Client stopService()

    03-13 14:49:48.710 : W/ContextImpl(6065) : Implicit intents with
    startService are not safe : Intent
    act=com.netcompss.ffmpeg4android.FFMpegRemoteServiceBridge

    android.content.ContextWrapper.stopService:499
    com.netcompss.ffmpeg4android_client.BaseWizard.stopService:451
    com.netcompss.ffmpeg4android_client.BaseWizard.handleServiceFinished:513

  • Convert video to animated GIF with FFmpeg [migrated]

    5 janvier 2014, par flexage

    I have FFmpeg installed and working on my Ubuntu 12.04 LTS Server.

    I have managed to successfully automate the process of uploading a video and converting it to both H264/MP4 and OGV for display on the web.

    I also wanted to generate an animated GIF thumbnail for the video.

    I have got as far as the following, which I'm pretty sure is generating 2 frames a second for the first 10 seconds of the video :

    /usr/local/bin/ffmpeg -i "$3/uploads/video-queue/$1.$2" -vf scale=320:-1 -t 10 -r 2 "$3/uploads/video-queue/processing/$1.gif"

    What I would prefer to do is generate 1 frame every 25 seconds for the duration of the entire video, but also with a maximum number of frames set as something like 50 frames.

    I would prefer not to have dependencies on other components such as Image Magik, and I would like to keep this purely shell based.

    Thanks in advance ! You guys are way smarter than me for sure !

    Here is the complete console output from an ffmpeg run of the command above :

    root@ubuntu:/home/fckster/etc/php5# /home/fckster/public_html/cronscripts/process-video-gif.sh 1-1388841621 wmv /home/fckster/public_html
    ffmpeg version N-59480-g8feaa83-syslint Copyright (c) 2000-2014 the FFmpeg developers
     built on Jan  2 2014 00:32:20 with gcc 4.6 (Ubuntu/Linaro 4.6.3-1ubuntu5)
     configuration: --prefix=/usr/local/cpffmpeg --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-decoder=liba52 --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslint
     libavutil      52. 59.100 / 52. 59.100
     libavcodec     55. 47.100 / 55. 47.100
     libavformat    55. 22.102 / 55. 22.102
     libavdevice    55.  5.102 / 55.  5.102
     libavfilter     4.  0.103 /  4.  0.103
     libswscale      2.  5.101 /  2.  5.101
     libswresample   0. 17.104 /  0. 17.104
     libpostproc    52.  3.100 / 52.  3.100
    [wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
    Guessed Channel Layout for  Input Stream #0.1 : stereo
    Input #0, asf, from '/home/fckster/public_html/uploads/video-queue/1-1388841621.wmv':
     Metadata:
       WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
       WM/ToolVersion  : 2204
       encoder         : Lavf54.29.104
     Duration: 00:01:11.30, start: 0.140000, bitrate: 2096 kb/s
       Stream #0:0: Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 1280x720, 29.97 tbr, 1k tbn, 1k tbc
       Stream #0:1: Audio: wmav2 (a[1][0][0] / 0x0161), 44100 Hz, stereo, fltp, 48 kb/s
    [wmv3 @ 0x24dd680] Extra data: 8 bits left, value: 0
    Output #0, gif, to '/home/fckster/public_html/uploads/video-queue/processing/1-1388841621.gif':
     Metadata:
       WM/ToolName     : Flip4Mac WMV Export Component for QuickTime (Mac)
       WM/ToolVersion  : 2204
       encoder         : Lavf55.22.102
       Stream #0:0: Video: gif, pal8, 320x180, q=2-31, 200 kb/s, 100 tbn, 10 tbc
    Stream mapping:
     Stream #0:0 -> #0:0 (wmv3 -> gif)
    Press [q] to stop, [?] for help
    frame=   87 fps= 52 q=0.0 Lsize=    2131kB time=00:00:10.00 bitrate=1745.9kbits/s dup=0 drop=170    
    video:2219kB audio:0kB subtitle:0 global headers:0kB muxing overhead -3.939009%