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  • La file d’attente de SPIPmotion

    28 novembre 2010, par

    Une file d’attente stockée dans la base de donnée
    Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
    Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...)

  • Contribute to documentation

    13 avril 2011

    Documentation is vital to the development of improved technical capabilities.
    MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
    To contribute, register to the project users’ mailing (...)

  • Selection of projects using MediaSPIP

    2 mai 2011, par

    The examples below are representative elements of MediaSPIP specific uses for specific projects.
    MediaSPIP farm @ Infini
    The non profit organizationInfini develops hospitality activities, internet access point, training, realizing innovative projects in the field of information and communication technologies and Communication, and hosting of websites. It plays a unique and prominent role in the Brest (France) area, at the national level, among the half-dozen such association. Its members (...)

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  • Real Time Audio and Video Streaming in C#

    16 novembre 2014, par Nuwan

    I am developing an application which can be used to stream audio and video in real time.
    I can stream in two different ways. I used a capture card to capture live HD stream and
    re send it. And also I need to stream local video file in real time.

    Now I capture video using OpenCV and store frames as bitmaps in blokingCollection bitmap queue.
    After that I encode video frames using ffmpeg (used c# library Nreco) and stored in a queue. Then I send that encoded data through UDP (did not used RTP/RTSP) to omxplayer in raspberry pi and it works very fine.

    Then I captured audio data using ffmpeg
    I used this command to capture and encode audio data.

                     data = ms.ToArray();
    
                 ffMpegTask = ffmpegConverter.ConvertLiveMedia(
    
                        fileName,
    
                        null,
    
                        ms,
    
                        Format.avi,
    
                        new ConvertSettings()
    
                        {                                
    
                            CustomOutputArgs = " -tune zerolatency -ss " + second + " -t " + endTime + " -strict experimental -acodec aac -ab 160k -ac 2 -ar 44100 -vn ",                             
    
                        });
    
                ffMpegTask.Start();
    
                ffMpegTask.Stop();
    
                byte[] data = ms.ToArray();

    After that I saved every audio data packet to queue.

    And I tried to stream these separate audio and video data to omxplayer by using two different
    ports. and received streams by using two omxplayers. And it works fine.

    But what I need to do is multiplex this audio and video stream and send as one stream.
    what I do is first stream two streams as UDP://224.1.1.1:1250(video) and UDP://224.1.1.1:1260(audio)
    then I used nreco invoke method. We can use it to execute ffmpeg commands.

    " -re -i udp://224.1.1.1:1250 -i udp://224.1.1.1:1260 -c copy -f avi udp://224.1.1.1:1270"

    and this works for both audio and video stream but completely out of sync.

    Next thing what I do is creating another ffmpeg ConvertLiveMedia task and write audio and video data
    to that task using write method. And I stream that mux data and received using ffplay. And it plays the stream
    and the sync problem is solved. But sometimes audio and video frames are dropping and then it begins to
    play out of sync.

                    combine = new MemoryStream();
    
                ffMpegTaskcom = ffmpegConvertercom.ConvertLiveMedia(
    
                        Format.mpeg,
    
                        combine,
    
                        Format.avi,
    
                        new ConvertSettings()
    
                        {
    
                            CustomInputArgs = " ", // windows bitmap pixel format
    
                            CustomOutputArgs = " -threads 7 -c:v libx264 -preset ultrafast -tune zerolatency -strict experimental -profile:v baseline -movflags +faststart -tune film -level 3.0 -tune zerolatency -tune film -pix_fmt yuv420p -g 250 -crf 22 -b:v 4000k -minrate 3000k -maxrate 5000k -acodec aac -ab 160k -ac 2 -ar 44100",
    

    
                        });
    
                ffMpegTaskcom.Start();
    
                byte[] streamBytesvi = null;
    
                byte[] streamBytesau = null;
    
                encodeQueqe.TryDequeue(out streamBytesvi);
    
                encodeQueqeau.TryDequeue(out streamBytesau);
    
                ffMpegTaskcom.Write(streamBytesvi, 0, streamBytesvi.Length);
    
                ffMpegTaskcom.Write(streamBytesau, 0, streamBytesau.Length);
    

    
                //ffMpegTaskcom.Wait();
    
                ffMpegTaskcom.Stop();

    Now I need to know a good method to deliver audio and video data with synchronization.
    Please tell me what is the wrong I have done or suggest a better way to do this.

    Thank You !

  • Recording a video by webcam on Raspberry Pi [on hold]

    9 août 2019, par Stan Eskin

    Need a python3 script for recording a video by a USB webcam on Raspberry Pi. For instance, I’d like to capture a video to the RasPi’s SD card when a motion sensor gives the signal.

    I’ve found this code for the terminal :
    ffmpeg -f v4l2 -r 25 -s 640x480 -i /dev/video0 out.avi

    Unfortunately, I don’t know how to implement it in my python3 script.

  • Bad video quality and only 3 fps

    25 juillet 2019, par ApplowPi

    There are a few things wrong with the quality of the output file when I run this command.

    arecord -d 0 -r 48000 -c 2 -f S16_LE -t wav -D sysdefault:CARD=tc358743 | avconv -t 0 -i pipe:0 -f v4l2 -i /dev/video0 -c:v libx264 -r 30 -acodec aac -ar 48000 -vcodec flv -strict experimental -y -f flv test.flv

    The audio seems okay at the moment but, if I’m reading it correctly (at the very bottom of the output below), the fps is about 3 and the quality is at 31, which I understand is the worse. This is the output during the process.

    I’m looking to get 30 fps (ideally 60 if possible).

    I’m pretty new to this, any help would be great. Thanks in advance.

    ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
Guessed Channel Layout for Input Stream #0.0 : stereo
    
Input #0, wav, from 'pipe:0':
    
  Duration: N/A, bitrate: 1536 kb/s
    
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo, s16, 1536 kb/s
    
[video4linux2,v4l2 @ 0x172e110] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
    
[video4linux2,v4l2 @ 0x172e110] Time per frame unknown
    
Input #1, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 927.631204, bitrate: N/A
    
    Stream #1:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 120 tbr, 1000k tbn, 1000k tbc
    
Output #0, flv, to 'test.flv':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Stream #0:0: Video: flv1 (flv) ([2][0][0][0] / 0x0002), yuv420p, 1280x720, q=2-31, 200 kb/s, 120 fps, 1k tbn, 120 tbc
    
    Metadata:
    
      encoder         : Lavc57.64.101 flv
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 128 kb/s
    
    Metadata:
    
      encoder         : Lavc57.64.101 aac
    
Stream mapping:
    
  Stream #1:0 -> #0:0 (rawvideo (native) -> flv1 (flv))
    
  Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native))
    
[wav @ 0x1728730] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    
[video4linux2,v4l2 @ 0x172e110] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
    
overrun!!! (at least 9513.101 ms long)44kB time=00:00:00.97 bitrate=2890.9kbits/s speed=0.0987x
    
overrun!!! (at least 25.077 ms long) 363kB time=00:00:01.84 bitrate=1614.1kbits/s speed=0.162x
    
overrun!!! (at least 254.192 ms long)421kB time=00:00:02.97 bitrate=1159.1kbits/s speed=0.226x
    
overrun!!! (at least 93.349 ms long) 441kB time=00:00:03.86 bitrate= 935.3kbits/s speed=0.263x
    
overrun!!! (at least 198.942 ms long)461kB time=00:00:04.97 bitrate= 758.6kbits/s speed=0.303x
    
overrun!!! (at least 155.909 ms long)526kB time=00:00:06.14 bitrate= 701.0kbits/s speed=0.337x
    
frame=   54 fps=2.8 q=31.0 Lsize=     534kB time=00:00:06.67 bitrate= 655.6kbits/s speed=0.352x

    Running different commands to see what happens. This command :

    avconv -t 0 -i /dev/video0 -c:v libx264 -preset ultrafast -y newtest.h264

    Slowly builds up to 40 fps but the result is still poor. Feels like it’s 5 fps not 40. The CPU percentage when running this is 65-70%. Output is :

    ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[video4linux2,v4l2 @ 0x16d4600] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
    
[video4linux2,v4l2 @ 0x16d4600] Time per frame unknown
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 5015.769341, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 59.94 tbr, 1000k tbn, 1000k tbc
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x16d77e0] using cpu capabilities: ARMv6 NEON
    
[libx264 @ 0x16d77e0] profile High 4:2:2, level 3.2, 4:2:2 8-bit
    
Output #0, h264, to 'newtest.h264':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Stream #0:0: Video: h264 (libx264), yuv422p, 1280x720, q=-1--1, 59.94 fps, 59.94 tbn, 59.94 tbc
    
    Metadata:
    
      encoder         : Lavc57.64.101 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
frame= 1813 fps= 37 q=-1.0 Lsize=    3218kB time=00:00:30.24 bitrate= 871.5kbits/s dup=1700 drop=0 speed=0.617x
    
video:3218kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%
    
[libx264 @ 0x16d77e0] frame I:8     Avg QP:14.00  size:170114
    
[libx264 @ 0x16d77e0] frame P:1805  Avg QP:15.46  size:  1071
    
[libx264 @ 0x16d77e0] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x16d77e0] mb P  I16..4:  0.4%  0.0%  0.0%  P16..4:  2.0%  0.0%  0.0%  0.0%  0.0%    skip:97.6%
    
[libx264 @ 0x16d77e0] coded y,uvDC,uvAC intra: 43.4% 28.3% 19.2% inter: 1.1% 0.8% 0.2%
    
[libx264 @ 0x16d77e0] i16 v,h,dc,p: 61% 26%  8%  5%
    
[libx264 @ 0x16d77e0] i8c dc,h,v,p: 68% 12% 17%  4%
    
[libx264 @ 0x16d77e0] kb/s:871.45

    Running this command :

    avconv -t 0 -i /dev/video0 -r 60 -c:v libx264 -preset ultrafast -y newtest.flv

    (just specifying a different output file format, results in a CPU usage of about 30% and produces this output :

    avconv -t 0 -i /dev/video0 -r 60 -c:v libx264 -preset ultrafast -y newtest.flv
    
ffmpeg version 3.2.10-1~deb9u1+rpt2 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
    
  configuration: --prefix=/usr --extra-version='1~deb9u1+rpt2' --toolchain=hardened --libdir=/usr/lib/arm-linux-gnueabihf --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libebur128 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --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-libxvid --enable-libzmq --enable-libzvbi --enable-omx-rpi --enable-mmal --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libiec61883 --arch=armhf --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
    
  libavutil      55. 34.101 / 55. 34.101
    
  libavcodec     57. 64.101 / 57. 64.101
    
  libavformat    57. 56.101 / 57. 56.101
    
  libavdevice    57.  1.100 / 57.  1.100
    
  libavfilter     6. 65.100 /  6. 65.100
    
  libavresample   3.  1.  0 /  3.  1.  0
    
  libswscale      4.  2.100 /  4.  2.100
    
  libswresample   2.  3.100 /  2.  3.100
    
  libpostproc    54.  1.100 / 54.  1.100
    
[video4linux2,v4l2 @ 0x527620] ioctl(VIDIOC_G_PARM): Inappropriate ioctl for device
    
[video4linux2,v4l2 @ 0x527620] Time per frame unknown
    
Input #0, video4linux2,v4l2, from '/dev/video0':
    
  Duration: N/A, start: 6071.912862, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (UYVY / 0x59565955), uyvy422, 1280x720, 120 tbr, 1000k tbn, 1000k tbc
    
No pixel format specified, yuv422p for H.264 encoding chosen.
    
Use -pix_fmt yuv420p for compatibility with outdated media players.
    
[libx264 @ 0x52a870] using cpu capabilities: ARMv6 NEON
    
[libx264 @ 0x52a870] profile High 4:2:2, level 3.2, 4:2:2 8-bit
    
[libx264 @ 0x52a870] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 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=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
    
Output #0, flv, to 'newtest.flv':
    
  Metadata:
    
    encoder         : Lavf57.56.101
    
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv422p, 1280x720, q=-1--1, 60 fps, 1k tbn, 60 tbc
    
    Metadata:
    
      encoder         : Lavc57.64.101 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
frame=  158 fps=4.1 q=-1.0 Lsize=     878kB time=00:00:30.70 bitrate= 234.2kbits/s speed=0.803x
    
video:874kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.385400%
    
[libx264 @ 0x52a870] frame I:1     Avg QP:20.00  size: 68854
    
[libx264 @ 0x52a870] frame P:157   Avg QP: 8.93  size:  5261
    
[libx264 @ 0x52a870] mb I  I16..4: 100.0%  0.0%  0.0%
    
[libx264 @ 0x52a870] mb P  I16..4:  1.4%  0.0%  0.0%  P16..4:  7.7%  0.0%  0.0%  0.0%  0.0%    skip:90.9%
    
[libx264 @ 0x52a870] coded y,uvDC,uvAC intra: 28.1% 13.8% 13.4% inter: 3.4% 2.7% 2.3%
    
[libx264 @ 0x52a870] i16 v,h,dc,p: 76% 22%  1%  1%
    
[libx264 @ 0x52a870] i8c dc,h,v,p: 88%  4%  7%  0%
    
[libx264 @ 0x52a870] kb/s:231.42

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