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  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Organiser par catégorie

    17 mai 2013, par

    Dans MédiaSPIP, une rubrique a 2 noms : catégorie et rubrique.
    Les différents documents stockés dans MédiaSPIP peuvent être rangés dans différentes catégories. On peut créer une catégorie en cliquant sur "publier une catégorie" dans le menu publier en haut à droite ( après authentification ). Une catégorie peut être rangée dans une autre catégorie aussi ce qui fait qu’on peut construire une arborescence de catégories.
    Lors de la publication prochaine d’un document, la nouvelle catégorie créée sera proposée (...)

  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
    Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)

Sur d’autres sites (7793)

  • How to fix video in gallery from not playing (probable cause encoding from ffmpeg)

    30 avril 2020, par Nathan Sinclair

    I'm setting up a video stream by which I can download a video into the Android gallery, so that I can play it back later.
I have a problem with playing the video back from gallery. The same problem arises when trying to view the url in a videoview.

    



    video information from ffmpeg displays this.

    



    Input #0, mpjpeg, from '':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[swscaler @ 0x1cab5e0] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0x1c6f030] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x1c6f030] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit
[libx264 @ 0x1c6f030] 264 - core 157 r2969 d4099dd - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - http://www.videolan.org/x264.html - options: cabac=0 ref=2 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=6 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf mbtree=1 crf=18.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, mp4, to 'out.mp4':
  Metadata:
    encoder         : Lavf58.33.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x406, q=-1--1, 30 fps, 15360 tbn, 30 tbc
    Metadata:
      encoder         : Lavc58.59.101 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Error opening file out.mp4: IsoMedia File is truncated28.56 bitrate= 734.1kbits/s speed=0.478x
[pid: 5138|app: 0|req: 1/1] 192.168.178.21 () {32 vars in 406 bytes} [Mon Oct  7 01:12:17 2019] GET /stop => generated 39 bytes in 152 msecs (HTTP/1.1 200) 2 headers in 79 bytes (1 switches on core 0)
frame=  899 fps= 15 q=-1.0 Lsize=    2779kB time=00:00:29.93 bitrate= 760.6kbits/s speed=0.49x
video:2775kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.157041%


    



    I have attempted to follow this article. Android MediaPlayer error (1, -2147483648)

    



    I'm using FFMpeg to record from a mjpeg stream into a file, which then is hosted by a uwsgi/flask server into a convenient url : http://ipaddress/video.mp4

    



    Thus far ive been able to open the video fine using chrome in Android.

    



    my FFMPEG command looks like this :

    



    ffmpeg -i $1 -crf 18 -r 30 -vf "scale=720x406, setpts='1/(30*TB) * (N + 0.05 * sin(N*2*PI/25))', fps=fps=30" -profile:v baseline -pix_fmt yuv420p -f mp4 -preset fast out.mp4


    



    I thought it may have something to do with the transmission of the file. I'm using an android library called volley to send the url so it can be downloaded as a file on the Android. Then it is subsequently put in gallery. This is when I began to experience the problems. I wanted to be thorough, so tried to find out if the file contents was the issue. This is because when displaying it on gallery, there is no width or height information, or even duration. I have come to suspect something is at issue with ffmpeg. I'm not cutting out that it could be keeping the file from opening if it can't find it's normal file properties.

    



    The volley code for the downloaded file is as follows :

    



     @Override
    public void onResponse(byte[] response) {
        try {
            if (response!=null) {

                File file = createVideoFile();

                FileOutputStream stream = new FileOutputStream(file);
                try {
                    stream.write(response);
                } finally {
                    stream.close();
                }

                addToGallery(file.getAbsolutePath());
                MediaScannerConnection.scanFile(this, new String[]{file.getAbsolutePath()}, null, (path, uri) -> {
                    Intent intent = new Intent (context, VideoActivity.class);
                    intent.setData(uri);
                    startActivity(intent);

                });


                Toast.makeText(this, "Download complete.", Toast.LENGTH_LONG).show();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            Log.d("KEY_ERROR", "UNABLE TO DOWNLOAD FILE");
            e.printStackTrace();
        }
    }

private void addToGallery(String path) throws FileNotFoundException {
        MediaScannerConnection.scanFile(context, new String[]{

                        path},

                null, new MediaScannerConnection.OnScanCompletedListener() {

                    public void onScanCompleted(String path, Uri uri)

                    {

                        Log.e(TAG, "file" + path + " was scanned successfully");

                    }

                });

        Uri uri = Uri.parse("file:///" + path);
        Intent intent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE, uri);
        context.sendBroadcast(intent);

        }


    



    I did have a VideoView to display it, as pertaining to a code example i found to download videos using volley.

    



    https://github.com/coderminion/AndroidVolleyLib

    


  • arm : vp9itxfm : Do a simpler half/quarter idct16/idct32 when possible

    22 novembre 2016, par Martin Storsjö
    arm : vp9itxfm : Do a simpler half/quarter idct16/idct32 when possible

    This work is sponsored by, and copyright, Google.
    

    This avoids loading and calculating coefficients that we know will
    
be zero, and avoids filling the temp buffer with zeros in places
    
where we know the second pass won’t read.
    

    This gives a pretty substantial speedup for the smaller subpartitions.
    

    The code size increases from 12388 bytes to 19784 bytes.
    

    The idct16/32_end macros are moved above the individual functions ; the
    
instructions themselves are unchanged, but since new functions are added
    
at the same place where the code is moved from, the diff looks rather
    
messy.
    

    Before :                              Cortex A7       A8       A9      A53
    
vp9_inv_dct_dct_16x16_sub1_add_neon :     273.0    189.5    212.0    235.8
    
vp9_inv_dct_dct_16x16_sub2_add_neon :    2102.1   1521.7   1736.2   1265.8
    
vp9_inv_dct_dct_16x16_sub4_add_neon :    2104.5   1533.0   1736.6   1265.5
    
vp9_inv_dct_dct_16x16_sub8_add_neon :    2484.8   1828.7   2014.4   1506.5
    
vp9_inv_dct_dct_16x16_sub12_add_neon :   2851.2   2117.8   2294.8   1753.2
    
vp9_inv_dct_dct_16x16_sub16_add_neon :   3239.4   2408.3   2543.5   1994.9
    
vp9_inv_dct_dct_32x32_sub1_add_neon :     758.3    456.7    864.5    553.9
    
vp9_inv_dct_dct_32x32_sub2_add_neon :   10776.7   7949.8   8567.7   6819.7
    
vp9_inv_dct_dct_32x32_sub4_add_neon :   10865.6   8131.5   8589.6   6816.3
    
vp9_inv_dct_dct_32x32_sub8_add_neon :   12053.9   9271.3   9387.7   7564.0
    
vp9_inv_dct_dct_32x32_sub12_add_neon :  13328.3  10463.2  10217.0   8321.3
    
vp9_inv_dct_dct_32x32_sub16_add_neon :  14176.4  11509.5  11018.7   9062.3
    
vp9_inv_dct_dct_32x32_sub20_add_neon :  15301.5  12999.9  11855.1   9828.2
    
vp9_inv_dct_dct_32x32_sub24_add_neon :  16482.7  14931.5  12650.1  10575.0
    
vp9_inv_dct_dct_32x32_sub28_add_neon :  17589.5  15811.9  13482.8  11333.4
    
vp9_inv_dct_dct_32x32_sub32_add_neon :  18696.2  17049.2  14355.6  12089.7
    

    After :
    
vp9_inv_dct_dct_16x16_sub1_add_neon :     273.0    189.5    211.7    235.8
    
vp9_inv_dct_dct_16x16_sub2_add_neon :    1203.5    998.2   1035.3    763.0
    
vp9_inv_dct_dct_16x16_sub4_add_neon :    1203.5    998.1   1035.5    760.8
    
vp9_inv_dct_dct_16x16_sub8_add_neon :    1926.1   1610.6   1722.1   1271.7
    
vp9_inv_dct_dct_16x16_sub12_add_neon :   2873.2   2129.7   2285.1   1757.3
    
vp9_inv_dct_dct_16x16_sub16_add_neon :   3221.4   2520.3   2557.6   2002.1
    
vp9_inv_dct_dct_32x32_sub1_add_neon :     753.0    457.5    866.6    554.6
    
vp9_inv_dct_dct_32x32_sub2_add_neon :    7554.6   5652.4   6048.4   4920.2
    
vp9_inv_dct_dct_32x32_sub4_add_neon :    7549.9   5685.0   6046.9   4925.7
    
vp9_inv_dct_dct_32x32_sub8_add_neon :    8336.9   6704.5   6604.0   5478.0
    
vp9_inv_dct_dct_32x32_sub12_add_neon :  10914.0   9777.2   9240.4   7416.9
    
vp9_inv_dct_dct_32x32_sub16_add_neon :  11859.2  11223.3   9966.3   8095.1
    
vp9_inv_dct_dct_32x32_sub20_add_neon :  15237.1  13029.4  11838.3   9829.4
    
vp9_inv_dct_dct_32x32_sub24_add_neon :  16293.2  14379.8  12644.9  10572.0
    
vp9_inv_dct_dct_32x32_sub28_add_neon :  17424.3  15734.7  13473.0  11326.9
    
vp9_inv_dct_dct_32x32_sub32_add_neon :  18531.3  17457.0  14298.6  12080.0
    

    Signed-off-by : Martin Storsjö <martin@martin.st>
    • [DBH] libavcodec/arm/vp9itxfm_neon.S

  • FFMPEG intermittent failures reading live RTMP stream

    22 janvier 2019, par stevendesu

    The Command

    I’m attempting to read a live RTMP stream and save the result to a file with the following command :

    ffmpeg -re -rtmp_live live -y -i "rtmp://<server>/<app>/<stream>" -c copy -f flv /tmp/dump.flv
    
</stream></app></server>

    I run this command then after 10-15 seconds I kill the process and check /tmp/dump.flv. I’m trying to do this for stream diagnostic purposes (determine the encoding, bitrate, resolution, pixel format, and key frame interval of the live stream)

    This command works about 25-50% of the time. When it works FFMPEG takes about 5 seconds to connect to the stream, then it begins dumping data to disk. After I kill the process, I can find a couple of megabytes of video data in /tmp/dump.flv which can be probed using ffprobe.

    When the command fails, it goes into one of two failure states :

    Failure State 1

    stderr is flooded with a series of messages about "missing picture in access unit with size X", and the output file /tmp/dump.flv is created but contains 0 bytes

    ffmpeg version 3.4.4-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
[NULL @ 0x55b72d568920] pps_id 381 out of range
    
[AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
    
    Last message repeated 1 times
    
[h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
    
    Last message repeated 1 times
    
[h264 @ 0x55b72d568920] no frame!
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2200
    
[AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
    
    Last message repeated 2 times
    
[h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
    
    Last message repeated 2 times
    
[h264 @ 0x55b72d568920] no frame!
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3171
    
[AVBSFContext @ 0x55b72d5692c0] Invalid NAL unit 0, skipping.
    
[h264 @ 0x55b72d568920] Invalid NAL unit 0, skipping.
    
[h264 @ 0x55b72d568920] no frame!
    
[NULL @ 0x55b72d568920] missing picture in access unit with size 80572
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 1560
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2608
    
[h264 @ 0x55b72d568920] non-existing PPS 0 referenced
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2734
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2885
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 77739
    
[h264 @ 0x55b72d568920] non-existing PPS 254 referenced
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3360
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2804
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3051
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3067
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 77693
    
[h264 @ 0x55b72d568920] non-existing PPS 0 referenced
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2421
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2779
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2442
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2678
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 76877
    
[h264 @ 0x55b72d568920] sps_id 15 out of range
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 1342
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2412
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 2238
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3550
    
[h264 @ 0x55b72d568920] missing picture in access unit with size 3075
    
...
    
(after hitting Ctrl+C:)
    
Input #0, flv, from 'rtmp://<server>/<app>/<stream>':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.83.100
    
  Duration: 00:00:00.00, start: 5285.919000, bitrate: N/A
    
    Stream #0:0: Video: h264 (Constrained Baseline), yuv420p, 1920x1080, 2543 kb/s, 24 fps, 24 tbr, 1k tbn, 48 tbc
    
Output #0, flv, to '/tmp/dump.flv':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.83.100
    
    Stream #0:0: Video: h264 (Constrained Baseline) ([7][0][0][0] / 0x0007), yuv420p, 1920x1080, q=2-31, 2543 kb/s, 24 fps, 24 tbr, 1k tbn, 1k tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
Press [q] to stop, [?] for help
    
frame=    0 fps=0.0 q=-1.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
    
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
    
Exiting normally, received signal 2.
    
</stream></app></server>

    Failure State 2

    The message "No start code is found." is displayed and FFMPEG immediately terminates after less than a half-second. When this happens the file /tmp/dump.flv is not created.

    ffmpeg version 3.4.4-1~16.04.york0 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version='1~16.04.york0' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
[NULL @ 0x56274b0be920] missing picture in access unit with size 3710
    
[AVBSFContext @ 0x56274b0bf2c0] No start code is found.
    
rtmp://<server>/<app>/<stream>: could not find codec parameters
    
Input #0, flv, from 'rtmp://<server>/<app>/<stream>':
    
  Metadata:
    
    major_brand     : isom
    
    minor_version   : 512
    
    compatible_brands: isomiso2avc1mp41
    
    encoder         : Lavf57.83.100
    
  Duration: 00:00:00.00, start: 0.000000, bitrate: N/A
    
    Stream #0:0: Video: h264, none, 2543 kb/s, 24 fps, 1k tbn
    
Output #0, flv, to '/tmp/dump.flv':
    
Output file #0 does not contain any stream
    
</stream></app></server></stream></app></server>

    What I’ve tried

    • Adding or removing -re to try and limit the input frame rate to the source frame rate
    • Adding or removing -rtmp_live live
    • Adding or removing -timeout 5 (or any other timeout value)
    • Using RTMP URL parameters (e.g. -i "rtmp://<server>/<app>/<stream> live=1 timeout=5"</stream></app></server>)

    Does anyone know why this command’s success is so intermittent or how I can get more consistent results ?

    Alternate Acceptable Solution

    The only reason I’m using ffmpeg to dump the stream to a temporary file at all is because I plan to perform multiple tests on the file (at least two at the moment — one to get the encoding, and another to get the key frame interval). By downloading the stream I reduce bandwidth usage and reduce runtime. However it’s perfectly acceptable to forego ffmpeg and just use ffprobe directly on the RTMP URL if this would help.

    Note that I did try this and I get the same two failure states with ffprobe

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