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  • Menus personnalisés

    14 novembre 2010, par

    MediaSPIP utilise le plugin Menus pour gérer plusieurs menus configurables pour la navigation.
    Cela permet de laisser aux administrateurs de canaux la possibilité de configurer finement ces menus.
    Menus créés à l’initialisation du site
    Par défaut trois menus sont créés automatiquement à l’initialisation du site : Le menu principal ; Identifiant : barrenav ; Ce menu s’insère en général en haut de la page après le bloc d’entête, son identifiant le rend compatible avec les squelettes basés sur Zpip ; (...)

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

  • 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 (10382)

  • AAC decoding with FFmpeg and Audio Toolbox decoder on the Mac not working

    20 juin 2017, par MrBigPixel

    I’m connecting to an mp4 RTSP stream with AAC audio. Connecting to it via command line ffmpeg and specifying "aac_at" for the decoder does playback audio correctly.

    However in my code when connecting to the same stream using avcodec_find_decoder_by_name("aac_at")
    the audio toolbox decoder produces white noise.

    To verify the correctness of the code by just replacing that line with
    avcodec_find_decoder_by_name("aac")
    the decoder does produce correct audio.

    Has anybody else experienced anything like this when using the ffmpeg libs and the audio toolbox AAC decoder on the Mac ?

  • ffmpeg and pulse audio creating buzzy speech

    17 juin 2017, par flashape

    I’m attempting to record video and audio from an ec2 instance (Ubuntu 16.04), using xvfb and pulse audio. Everything works fine, except that the output file contains "buzzy" speech (not sure if this is what "clipping" is ?). This happens using either aac or mp3 audio codecs.

    Sample audio file : http://s000.tinyupload.com/index.php?file_id=86237391396073526211

    ffmpeg command :

    ffmpeg \
    
-f x11grab -framerate 30 -video_size ${SCREEN_WIDTH}x${SCREEN_HEIGHT} -i :1.0 \
    
-f pulse -i default \
    
-c:v libx264 -preset veryfast -maxrate 2500k -bufsize 2500k -vf "format=yuv420p" -g 60 \
    
-c:a aac -strict -2 -channel_layout stereo  -ab 256k -ar 48000 -bufsize 512k -ac 2  \
    
-flags +global_header -f flv "test.mp4"

    The output from ffmpeg when I run the command :

    Input #0, x11grab, from ':1.0':
    
  Duration: N/A, start: 1497567394.762052, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1360x764, 30 fps, 30 tbr, 1000k tbn, 30 tbc
    
Guessed Channel Layout for  Input Stream #1.0 : stereo
    
Input #1, pulse, from 'default':
    
  Duration: N/A, start: 1497567396.743667, bitrate: 1536 kb/s
    
    Stream #1:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
    
[libx264 @ 0x1977d20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x1977d20] profile High, level 3.2
    
[libx264 @ 0x1977d20] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 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=1 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=2500 vbv_bufsize=512 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
    
Output #0, flv, to 'test.mp4':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1360x764, q=-1--1, max. 2500 kb/s, 30 fps, 1k tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
    Stream #0:1: Audio: aac ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 256 kb/s
    
    Metadata:
    
      encoder         : Lavc56.60.100 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))

    Based on various posts, I thought it might be something in the pulse config, particularly the "resample-method" setting, but that doesn’t appear to do anything. Here is how the /etc/pulse/daemon.conf config file currently stands :

    ; daemonize = no
    
; fail = yes
    
; allow-module-loading = yes
    
; allow-exit = yes
    
; use-pid-file = yes
    
; system-instance = no
    
; local-server-type = user
    
; enable-shm = yes
    
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
    
; lock-memory = no
    
; cpu-limit = no
    

    
; high-priority = yes
    
; nice-level = -11
    

    
; realtime-scheduling = yes
    
; realtime-priority = 5
    

    
; exit-idle-time = 20
    
; scache-idle-time = 20
    

    
; dl-search-path = (depends on architecture)
    

    
; load-default-script-file = yes
    
; default-script-file = /etc/pulse/default.pa
    

    
; log-target = auto
    
; log-level = notice
    
; log-meta = no
    
; log-time = no
    
; log-backtrace = 0
    

    
; resample-method = speex-float-1
    
; resample-method = speex-float-10
    
resample-method = speex-fixed-10
    
; enable-remixing = yes
    
enable-lfe-remixing = yes
    
; lfe-crossover-freq = 120
    

    
flat-volumes = no
    

    
; rlimit-fsize = -1
    
; rlimit-data = -1
    
; rlimit-stack = -1
    
; rlimit-core = -1
    
; rlimit-as = -1
    
; rlimit-rss = -1
    
; rlimit-nproc = -1
    
; rlimit-nofile = 256
    
; rlimit-memlock = -1
    
; rlimit-locks = -1
    
; rlimit-sigpending = -1
    
; rlimit-msgqueue = -1
    
; rlimit-nice = 31
    
; rlimit-rtprio = 9
    
; rlimit-rttime = 200000
    

    
; default-sample-format = s16le
    
default-sample-format = s32le
    
default-sample-rate = 44100
    
; default-sample-rate = 48000
    
; alternate-sample-rate = 48000
    
alternate-sample-rate = 44100
    
; default-sample-channels = 2
    
; default-channel-map = front-left,front-right
    

    
; default-fragments = 4
    
; default-fragment-size-msec = 25
    
; default-fragments = 4
    
; default-fragment-size-msec = 25
    

    

    
; enable-deferred-volume = yes
    
deferred-volume-safety-margin-usec = 1
    
; deferred-volume-extra-delay-usec = 0

    Edit :

    Ok, updated the ffmpeg command to capture only the audio, but still have the same issue :

    ffmpeg \
    
-f pulse -i default \
    
-c:a aac -strict -2 -channel_layout stereo  -ab 256k -ar 48000 -bufsize 512k -ac 2  \
    
test.aac

    I do get some interesting messages in the output about timestamps being off :

    [aac @ 0x12a4900] Queue input is backward in timeits/s
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 175924
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 176948
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 177972
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 178996
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 180020
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 181044
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 182068
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 183406
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 184430
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 185454
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 186478
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 187502
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 188526
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 189550
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 190574
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 169622
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 170646
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 171670
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 172694
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 173718
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 174742
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 175766
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 176790
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 157020
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 158083
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 159107
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 160131
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 161155
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 162179
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 163203
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 164227
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 165251
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 154697
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 159400
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 160424
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 161448
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 162472
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 163496
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 164520
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 165544
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 166568
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 171795
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 172819
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 173843
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 174867
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 175891
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 176915
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 177939
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 178963
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 187279
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 189829
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 190853
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 191877
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 192901
    
[aac @ 0x12a4900] Queue input is backward in time
    
    Last message repeated 2 times
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 216172
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214950
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214933
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214836

  • ffmpeg amerge prefer longest audio track

    4 décembre 2013, par Adam Chance

    I'm trying to combine two audio tracks in ffmpeg with amerge, but it is only as long as the shortest feature. The ffmpeg wiki says that this is the behaviour of the amerge filter, but I need the output to be as long as the longest audio track. The code I'm using is

    ffmpeg -i audio.flac -i song.flac -filter_complex amerge -acodec mp2 -b:a 128k audiotrack.mp2

    Console output :

        ffmpeg version N-58688-gc46ab34 Copyright (c) 2000-2013 the FFmpeg developers
    
    built on Dec  1 2013 14:39:22 with gcc 4.7 (Ubuntu/Linaro 4.7.3-1ubuntu1)
    
    configuration: --enable-outdev=alsa --enable-indev=alsa --enable-gpl --enable-x11grab --enable-libpulse --enable-libopus --enable-libvorbis --enable-libtheora --enable-pthreads
    
    libavutil      52. 56.100 / 52. 56.100
    
    libavcodec     55. 44.100 / 55. 44.100
    
    libavformat    55. 22.100 / 55. 22.100
    
    libavdevice    55.  5.102 / 55.  5.102
    
    libavfilter     3. 91.100 /  3. 91.100
    
    libswscale      2.  5.101 /  2.  5.101
    
    libswresample   0. 17.104 /  0. 17.104
    
    libpostproc    52.  3.100 / 52.  3.100
    
    Input #0, flac, from 'audio.flac':
    
    Metadata:
    
    ENCODER         : Lavf55.22.100
    
    Duration: 00:00:04.14, bitrate: 172 kb/s
    
    Stream #0:0: Audio: flac, 16000 Hz, mono, s16
    
    Input #1, flac, from 'song.flac':
    
    Duration: 00:07:38.04, bitrate: 676 kb/s
    
    Stream #1:0: Audio: flac, 44100 Hz, stereo, s16
    
    Stream #1:1: Video: mjpeg, yuvj444p(pc), 500x500 [SAR 28:28 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    
    Metadata:
    
    comment         : Cover (front)
    
    File 'audiotrack.mp2' already exists. Overwrite ? [y/N] y
    
    [Parsed_amerge_0 @ 0x317f580] No channel layout for input 1
    
    Output #0, mp2, to 'audiotrack.mp2':
    
    Metadata:
    
    encoder         : Lavf55.22.100
    
    Stream #0:0: Audio: mp2, 16000 Hz, stereo, s16, 128 kb/s (default)
    
    Stream mapping:
    
    Stream #0:0 (flac) -> amerge:in0
    
    Stream #1:0 (flac) -> amerge:in1
    
    amerge -> Stream #0:0 (mp2)
    
    Press [q] to stop, [?] for help
    
    size=      65kB time=00:00:04.14 bitrate= 128.9kbits/s

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