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Autres articles (58)

  • MediaSPIP v0.2

    21 juin 2013, par

    MediaSPIP 0.2 est la première version de MediaSPIP stable.
    Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

Sur d’autres sites (9140)

  • How to rename and move files in a subdirectory with an index and the folder name ... better ?

    29 octobre 2014, par krismajean

    I’m putting together a script to take .mp4 files organized into folders that described the video (eg. cat) and I’d like to do the following :

    1. rename them with the folder name and a number ;
    2. move the video into a folder named and numbered in the same manner
    3. parse the video into frames using ffmpeg

    I’m posting this here to be a reference for others and to ask about how this could be done better. It works well but I’m wondering how to make it better.

    for dir in /path/to/parent/directory/*; do
    
cd "$dir" && result=${PWD##*/} 
    
cd video
    
echo $result
    
a=1
    
    for i in *.mp4; do
    
        dafile="$(printf "_%02d.mp4" ${a})" 
    
        dafolder="$(printf "_%02d" ${a})"
    
        newfolder=$result$dafolder
    
        newfile=$result$dafile
    
        mkdir ${newfolder}
    
        mv ${i} ${newfolder}/${newfile}
    

    
        cd ${newfolder}
    
            ffmpeg -i ${newfile} -r 30 -f image2 ${newfolder}-\%04d.png
    
        cd ..
    
        let a=a+1
    
    done
    

    
done

    I used the following links to figure out a bunch of ideas for the code :

  • Get current directory name (without full path) in Bash Script
  • Renaming files in a folder to sequential numbers

  • FFMPEG : RTSP re-stream dies randomly

    14 mai 2018, par stevendesu

    I have a security camera streaming RTSP, and I wish to re-stream this to an RTMP ingest server. For now I’m using my laptop as an ffmpeg proxy, but eventually I’ll use a raspberry pi or something similar (cheap/small)

    Here’s the command I’m using (pretty simple) :

    ffmpeg -i rtsp://@10.0.0.16:554/1/h264major -c:v libx264 -c:a none -f flv rtmp://output/camera_stream

    This works but after a minute or two the stream dies. Here’s the output :

    ffmpeg version N-90057-g7c82e0f Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.6) 20160609
    
  configuration: --prefix=/home/sbarnett/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/sbarnett/ffmpeg_build/include --extra-ldflags=-L/home/sbarnett/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/sbarnett/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libspeex --enable-nonfree
    
  libavutil      56.  7.101 / 56.  7.101
    
  libavcodec     58. 11.101 / 58. 11.101
    
  libavformat    58.  9.100 / 58.  9.100
    
  libavdevice    58.  1.100 / 58.  1.100
    
  libavfilter     7. 12.100 /  7. 12.100
    
  libswscale      5.  0.101 /  5.  0.101
    
  libswresample   3.  0.101 /  3.  0.101
    
  libpostproc    55.  0.100 / 55.  0.100
    
Input #0, rtsp, from 'rtsp://@10.0.0.16:554/1/h264major':
    
  Metadata:
    
    title           : h264major
    
    comment         : h264major
    
  Duration: N/A, start: 0.360000, bitrate: N/A
    
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 720x480, 25 fps, 25 tbr, 90k tbn, 50 tbc
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
Press [q] to stop, [?] for help
    
[libx264 @ 0x38843c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 0x38843c0] profile High, level 3.0
    
[libx264 @ 0x38843c0] 264 - core 155 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, flv, to 'rtmp://output/camera_stream':
    
  Metadata:
    
    title           : h264major
    
    comment         : h264major
    
    encoder         : Lavf58.9.100
    
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuvj420p(pc), 720x480, q=-1--1, 25 fps, 1k tbn, 25 tbc
    
    Metadata:
    
      encoder         : Lavc58.11.101 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
Past duration 0.999992 too large
    
    Last message repeated 29 times
    
[rtsp @ 0x3847600] max delay reached. need to consume packet
    
[rtsp @ 0x3847600] RTP: missed 48 packets
    
Past duration 0.999992 too large
    
    Last message repeated 4 times
    
frame=   44 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=5 speed=   0x    
    
frame=   57 fps= 54 q=28.0 size=      43kB time=00:00:00.16 bitrate=2186.4kbits/s dup=0 drop=5 speed=0.153x    
    
... (lots of similar messages) ...   
    
frame= 1163 fps= 26 q=28.0 size=    1341kB time=00:00:44.84 bitrate= 245.0kbits/s dup=0 drop=5 speed=0.99x    
    
frame= 1177 fps= 26 q=28.0 size=    1353kB time=00:00:45.40 bitrate= 244.2kbits/s dup=0 drop=5 speed=0.99x    
    
[rtsp @ 0x3847600] max delay reached. need to consume packet
    
[rtsp @ 0x3847600] RTP: missed 2 packets
    
frame= 1190 fps= 26 q=28.0 size=    1370kB time=00:00:45.92 bitrate= 244.4kbits/s dup=0 drop=5 speed=0.99x    
    
[h264 @ 0x38c08c0] Increasing reorder buffer to 1
    
frame= 1201 fps= 26 q=28.0 size=    1381kB time=00:00:46.36 bitrate= 244.0kbits/s dup=0 drop=5 speed=0.989x    
    
frame= 1214 fps= 26 q=28.0 size=    1393kB time=00:00:46.88 bitrate= 243.4kbits/s dup=0 drop=5 speed=0.989x    
    
... (lots of similar messages) ...    
    
frame= 1761 fps= 25 q=28.0 size=    2030kB time=00:01:08.80 bitrate= 241.7kbits/s dup=0 drop=5 speed=0.993x    
    
frame= 1774 fps= 25 q=28.0 size=    2041kB time=00:01:09.32 bitrate= 241.2kbits/s dup=0 drop=5 speed=0.993x    
    
[flv @ 0x3884900] Failed to update header with correct duration.
    
[flv @ 0x3884900] Failed to update header with correct filesize.
    
frame= 1782 fps= 25 q=-1.0 Lsize=    2127kB time=00:01:11.64 bitrate= 243.2kbits/s dup=0 drop=5 speed=1.02x    
    
video:2092kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.679417%
    
[libx264 @ 0x38843c0] frame I:8     Avg QP:16.89  size: 42446
    
[libx264 @ 0x38843c0] frame P:1672  Avg QP:19.54  size:  1065
    
[libx264 @ 0x38843c0] frame B:102   Avg QP:23.00  size:   205
    
[libx264 @ 0x38843c0] consecutive B-frames: 92.4%  0.0%  0.0%  7.6%
    
[libx264 @ 0x38843c0] mb I  I16..4: 12.9% 36.2% 50.9%
    
[libx264 @ 0x38843c0] mb P  I16..4:  0.2%  0.2%  0.0%  P16..4: 16.7%  0.7%  1.0%  0.0%  0.0%    skip:81.1%
    
[libx264 @ 0x38843c0] mb B  I16..4:  0.1%  0.1%  0.0%  B16..8: 11.7%  0.1%  0.0%  direct: 1.5%  skip:86.5%  L0:62.2% L1:35.3% BI: 2.5%
    
[libx264 @ 0x38843c0] 8x8 transform intra:40.8% inter:47.4%
    
[libx264 @ 0x38843c0] coded y,uvDC,uvAC intra: 46.5% 53.0% 17.2% inter: 3.9% 8.7% 0.0%
    
[libx264 @ 0x38843c0] i16 v,h,dc,p: 21% 56%  8% 15%
    
[libx264 @ 0x38843c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 33% 31%  1%  2%  3%  2%  2%  3%
    
[libx264 @ 0x38843c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 25% 39%  9%  3%  3%  4%  5%  3%  8%
    
[libx264 @ 0x38843c0] i8c dc,h,v,p: 43% 33% 21%  3%
    
[libx264 @ 0x38843c0] Weighted P-Frames: Y:0.0% UV:0.0%
    
[libx264 @ 0x38843c0] ref P L0: 88.0%  1.4%  6.6%  4.0%
    
[libx264 @ 0x38843c0] ref B L0: 99.4%  0.5%  0.1%
    
[libx264 @ 0x38843c0] ref B L1: 99.4%  0.6%
    
[libx264 @ 0x38843c0] kb/s:238.73

    The camera is pretty cheap (from China) so it’s likely I’m getting bad data from it or it’s cutting out for a few seconds at a time. Ideally I would need ffmpeg to handle this well (ignore bad data, wait as long as necessary for good data to resume encoding)

    Using ffplay to check out the RTSP stream, I get output like the following :

    $> ffplay -i rtsp://@10.0.0.16:554/1/h264major
    
ffplay version N-90057-g7c82e0f Copyright (c) 2003-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.6) 20160609
    
  configuration: --prefix=/home/sbarnett/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/sbarnett/ffmpeg_build/include --extra-ldflags=-L/home/sbarnett/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/sbarnett/bin --enable-gpl --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libspeex --enable-nonfree
    
  libavutil      56.  7.101 / 56.  7.101
    
  libavcodec     58. 11.101 / 58. 11.101
    
  libavformat    58.  9.100 / 58.  9.100
    
  libavdevice    58.  1.100 / 58.  1.100
    
  libavfilter     7. 12.100 /  7. 12.100
    
  libswscale      5.  0.101 /  5.  0.101
    
  libswresample   3.  0.101 /  3.  0.101
    
  libpostproc    55.  0.100 / 55.  0.100
    
Input #0, rtsp, from 'rtsp://@10.0.0.16:554/1/h264major':0B f=0/0
    
  Metadata:
    
    title           : h264major
    
    comment         : h264major
    
  Duration: N/A, start: 0.320000, bitrate: N/A
    
    Stream #0:0: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 720x480, 25 fps, 25 tbr, 90k tbn, 50 tbc
    
[swscaler @ 0x7f6bbc093180] deprecated pixel format used, make sure you did set range correctly
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 2 packets
    
[h264 @ 0x7f6bc0041080] error while decoding MB 44 28, bytestream -37
    
[h264 @ 0x7f6bc0041080] concealing 95 DC, 95 AC, 95 MV errors in I frame
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 1 packets
    
[h264 @ 0x7f6bc0041080] error while decoding MB 43 29, bytestream -49
    
[h264 @ 0x7f6bc0041080] concealing 51 DC, 51 AC, 51 MV errors in I frame
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 2 packets
    
[h264 @ 0x7f6bc0041080] Increasing reorder buffer to 1
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 3 packets
    
[h264 @ 0x7f6bc02c3600] error while decoding MB 27 29, bytestream -24
    
[h264 @ 0x7f6bc02c3600] concealing 67 DC, 67 AC, 67 MV errors in I frame
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 2 packets
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 42 packets
    
[rtsp @ 0x7f6bc0000940] max delay reached. need to consume packet
    
[rtsp @ 0x7f6bc0000940] RTP: missed 2 packets

    Then eventually the video just freezes. The first time it froze after around 5 minutes, but I wasn’t able to say definitively if it froze the instant 44 packets were dropped or if it froze randomly later. So the second time I stared intently.... for 21 minutes. Then I got bored of it not freezing, turned to pet my cat, and when I looked back 15 seconds later it was frozen. I think it only breaks when no one is watching it.

    What I can say definitively is :

    • While running normally, M-V hovers around 0 (anywhere between -0.01 and +0.01)
    • Once frozen, M-V begins to count down into negative numbers without stopping - although at a rate slower than -1 per second
    • While running normally, aq is 0KB and vq is a positive number (I think it was 30KB or so ?)
    • Once frozen, vq is also 0KB

    It’s a really cheap camera with a crummy power supply that goes out if you breathe on it, so it’s likely the camera is going temporarily offline during this time — but I’d like ffmpeg to wait out a timeout and resume streaming when it sees the camera again.

  • Parse mkv file to get duration

    14 mai 2018, par Parth Shah

    I have one mkv file that doesn’t have valid duration.
    I want to change this duration parameter manually.
    I gone through this matroska specification defined at
    http://www.matroska.org/technical/specs/index.html

    Looking at specification for matroska this contains only identification magic numbers, but this doesn’t specify length for data.

    So, My question is how to parse this matroska header so that i get duration field and change this field ?

    Any Help or advice ? Thank you in advance.

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