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  • Installation en mode ferme

    4 février 2011, par

    Le mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
    C’est la méthode que nous utilisons sur cette même plateforme.
    L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
    Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...)

  • Submit bugs and patches

    13 avril 2011

    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
    You may also (...)

  • Configuration spécifique d’Apache

    4 février 2011, par

    Modules spécifiques
    Pour la configuration d’Apache, il est conseillé d’activer certains modules non spécifiques à MediaSPIP, mais permettant d’améliorer les performances : mod_deflate et mod_headers pour compresser automatiquement via Apache les pages. Cf ce tutoriel ; mode_expires pour gérer correctement l’expiration des hits. Cf ce tutoriel ;
    Il est également conseillé d’ajouter la prise en charge par apache du mime-type pour les fichiers WebM comme indiqué dans ce tutoriel.
    Création d’un (...)

Sur d’autres sites (8936)

  • Issue when combining 2 video files [after matching the specs]

    6 décembre 2015, par Rune

    Basically I got a .mp4 and a .flv file which I want to concatenate (the .mp4 should be the intro).

    So after having asked a previous question regarding this I went ahead and converted the intro video to an .flv with matching specifications of the second video.

    First I got the specifications of the second (.flv) video using ffprobe. This was the output :

    {
    
    "streams": [
    
        {
    
            "index": 0,
    
            "codec_name": "h264",
    
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
    
            "profile": "High",
    
            "codec_type": "video",
    
            "codec_time_base": "1/50",
    
            "codec_tag_string": "[0][0][0][0]",
    
            "codec_tag": "0x0000",
    
            "width": 646,
    
            "height": 364,
    
            "coded_width": 656,
    
            "coded_height": 368,
    
            "has_b_frames": 2,
    
            "sample_aspect_ratio": "1:1",
    
            "display_aspect_ratio": "323:182",
    
            "pix_fmt": "yuv420p",
    
            "level": 30,
    
            "chroma_location": "left",
    
            "refs": 5,
    
            "is_avc": "true",
    
            "nal_length_size": "4",
    
            "r_frame_rate": "25/1",
    
            "avg_frame_rate": "25/1",
    
            "time_base": "1/1000",
    
            "start_pts": 80,
    
            "start_time": "0.080000",
    
            "bit_rate": "400000",
    
            "bits_per_raw_sample": "8",
    
            "disposition": {
    
                "default": 0,
    
                "dub": 0,
    
                "original": 0,
    
                "comment": 0,
    
                "lyrics": 0,
    
                "karaoke": 0,
    
                "forced": 0,
    
                "hearing_impaired": 0,
    
                "visual_impaired": 0,
    
                "clean_effects": 0,
    
                "attached_pic": 0
    
            }
    
        },
    
        {
    
            "index": 1,
    
            "codec_name": "aac",
    
            "codec_long_name": "AAC (Advanced Audio Coding)",
    
            "profile": "LC",
    
            "codec_type": "audio",
    
            "codec_time_base": "1/44100",
    
            "codec_tag_string": "[0][0][0][0]",
    
            "codec_tag": "0x0000",
    
            "sample_fmt": "fltp",
    
            "sample_rate": "44100",
    
            "channels": 2,
    
            "channel_layout": "stereo",
    
            "bits_per_sample": 0,
    
            "r_frame_rate": "0/0",
    
            "avg_frame_rate": "0/0",
    
            "time_base": "1/1000",
    
            "start_pts": 241,
    
            "start_time": "0.241000",
    
            "bit_rate": "96000",
    
            "disposition": {
    
                "default": 0,
    
                "dub": 0,
    
                "original": 0,
    
                "comment": 0,
    
                "lyrics": 0,
    
                "karaoke": 0,
    
                "forced": 0,
    
                "hearing_impaired": 0,
    
                "visual_impaired": 0,
    
                "clean_effects": 0,
    
                "attached_pic": 0
    
            }
    
        }
    
    ],
    
    "format": {
    
        "filename": "vid2.flv",
    
        "nb_streams": 2,
    
        "nb_programs": 0,
    
        "format_name": "flv",
    
        "format_long_name": "FLV (Flash Video)",
    
        "start_time": "0.080000",
    
        "duration": "371.920000",
    
        "size": "23876671",
    
        "bit_rate": "513587",
    
        "probe_score": 100,
    
        "tags": {
    
            "audiosize": "4476626",
    
            "canSeekToEnd": "true",
    
            "datasize": "23876671",
    
            "videosize": "19004263",
    
            "hasAudio": "true",
    
            "hasCuePoints": "false",
    
            "hasKeyframes": "true",
    
            "hasMetadata": "true",
    
            "hasVideo": "true",
    
            "lasttimestamp": "372",
    
            "metadatacreator": "flvtool++ (Facebook, Motion project, dweatherford)",
    
            "totalframes": "9298",
    
            "encoder": "Lavf56.36.100"
    
        }
    
    }
    
}

    Here’s my command :

    -i prefix.mp4 -b:v 400k -b:a 96k -r 25 -ar 44100 -acodec aac -vf scale=646:364 -strict -2 prefix.flv.

    This produces the following output (as well as the video file) :

    ffmpeg version N-76137-gb0bb1dc Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 5.2.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
    
  libavutil      55.  4.100 / 55.  4.100
    
  libavcodec     57.  7.100 / 57.  7.100
    
  libavformat    57.  8.102 / 57.  8.102
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6. 12.100 /  6. 12.100
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.100 /  2.  0.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'prefix.mp4':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.8.102
    
  Duration: 00:00:05.31, start: 0.000000, bitrate: 1589 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1205 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 384 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
Output #0, flv, to 'prefix.flv':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.8.102
    
    Stream #0:0(und): Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 646x364 [SAR 2912:2907 DAR 16:9], q=2-31, 400 kb/s, 25 fps, 1k tbn, 25 tbc (default)
    
    Metadata:
    
      handler_name    : VideoHandler
    
      encoder         : Lavc57.7.100 flv
    
    Stream #0:1(und): Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, 5.1, fltp, 96 kb/s (default)
    
    Metadata:
    
      handler_name    : SoundHandler
    
      encoder         : Lavc57.7.100 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> flv1 (flv))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
frame=   79 fps=0.0 q=10.7 size=     381kB time=00:00:03.43 bitrate= 908.7kbits/frame=  132 fps=0.0 q=10.1 Lsize=     548kB time=00:00:05.31 bitrate= 844.1kbits/s
    
video:479kB audio:62kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.161623%
    
[aac @ 0000021aa893eae0] Qavg: 177.292

    I then run the outputted video file and it runs just like the old one.

    I then concatenate the ouputted intro file with my main video file using the following command (tmp.txt contains the 2 files) :

    -f concat -i tmp.txt -c copy newvid.flv

    This produces the following output :

    ffmpeg version N-76137-gb0bb1dc Copyright (c) 2000-2015 the FFmpeg developers
    
  built with gcc 5.2.0 (GCC)
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
    
  libavutil      55.  4.100 / 55.  4.100
    
  libavcodec     57.  7.100 / 57.  7.100
    
  libavformat    57.  8.102 / 57.  8.102
    
  libavdevice    57.  0.100 / 57.  0.100
    
  libavfilter     6. 12.100 /  6. 12.100
    
  libswscale      4.  0.100 /  4.  0.100
    
  libswresample   2.  0.100 /  2.  0.100
    
  libpostproc    54.  0.100 / 54.  0.100
    
Input #0, concat, from 'tmp.txt':
    
  Duration: N/A, start: 0.000000, bitrate: 496 kb/s
    
    Stream #0:0: Video: flv1, yuv420p, 646x364, 400 kb/s, 25 fps, 25 tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: aac (LC), 44100 Hz, 5.1, fltp, 96 kb/s
    
[flv @ 00000257b5f0e180] Codec for stream 0 does not use global headers but container format requires global headers
    
[flv @ 00000257b5f0e180] Codec for stream 1 does not use global headers but container format requires global headers
    
Output #0, flv, to 'newvid.flv':
    
  Metadata:
    
    encoder         : Lavf57.8.102
    
    Stream #0:0: Video: flv1 ([2][0][0][0] / 0x0002), yuv420p, 646x364, q=2-31, 400 kb/s, 25 fps, 25 tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: aac ([10][0][0][0] / 0x000A), 44100 Hz, 5.1, 96 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
[flv @ 00000257b56947e0] Packet mismatch 486539264 7424
    
[flv @ 00000257b56947e0] Auto-inserting h264_mp4toannexb bitstream filter
    
[flv @ 00000257b5f0e180] Non-monotonous DTS in output stream 0:0; previous: 5263, current: 5255; changing to 5263. This may result in incorrect timestamps in the output file.
    
frame= 6359 fps=0.0 q=-1.0 size=   15906kB time=00:04:14.30 bitrate= 512.4kbits/frame= 9428 fps=0.0 q=-1.0 Lsize=   23835kB time=00:06:17.05 bitrate= 517.8kbits/s
    
video:19016kB audio:4403kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.777447%

    When I try to run the final video (newvid.flv) it plays like this :

    It starts off playing the intro just fine.
    However, when the intro is finished the video freezes while the sound of the actual video continues for the entire duration of the video.

    Thus in conclusion what is lacking is the video of the second vid (the audio is fine).

    I’m new at using ffmpeg but I’ve tried my best to solve this, which is why I’m asking for your help.

    I’d certainly appreciate if someone could help me out.

  • Muxing of two audio files using ffmpeg (in C) [on hold]

    8 décembre 2015, par Abhishek Gupta

    I need to mux two audio files to create a final audio file using ffmpeg. There are a lot of easy solutions available for commandline approach of doing so (e.g. How to overlay two audio files using ffmpeg).

    I need something written natively in C or C++ language.

  • ffmpeg not capturing frames in windows using java

    19 août 2013, par user2320537

    I have to develop a tool in java that will capture frames from webcam, Now what I have done for that is, I have used Runtime class to run ffmpeg and other commands, when it opens web-cam then after sometime my web-cam hangs and it does not capture frames.

    I am using following method for that.

    public class FFMPEGClass {
    

    
    private String ffmpegExeLocation;
    
    private final String FRAME_DIGITS = "010";
    

    
    public FFMPEGClass(String capturingDName, String outputImagesLocation, int framesPerSecond) {
    
        ffmpegExeLocation = System.getProperty("user.dir") + "\\bin\\";
    
        System.out.println(ffmpegExeLocation);
    
        try {
    
            System.out.println(ffmpegExeLocation + "ffplay -f dshow -video_size 640x480 -i video=\"" + capturingDName + "\"");
    
            Runtime.getRuntime().exec(ffmpegExeLocation + "ffplay -f dshow -video_size 640x480 -i video=\"" + capturingDName + "\"");
    
            System.out.println(ffmpegExeLocation + "ffmpeg -t 100000 "
    
                    + "-f vfwcap -s 640x480 -i 0 -r 1/" + framesPerSecond + " -f image2 " + outputImagesLocation + "\\camera%"+FRAME_DIGITS+"d.jpg");
    
            Runtime.getRuntime().exec(ffmpegExeLocation + "ffmpeg -t 100000 "
    
                    + "-f vfwcap -s 640x480 -i 0 -r 1/" + framesPerSecond + " -f image2 " + outputImagesLocation + "\\camera%"+FRAME_DIGITS+"d.jpg");
    
        } catch (Exception ex) {
    
            ex.printStackTrace();
    
        }
    
    }
    
}

    In my case capturingDName is USB2.0 UVC VGA WebCam
    outputImagesLocation is d :\frames and
    framesPerSecond is 16

    For a moment if i run these commands in command prompt then also I am unable to capture frames.

    I have already checked many answers from google and stackoverflow but these are not working in my case

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