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Autres articles (31)

  • 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 (...)

  • Keeping control of your media in your hands

    13 avril 2011, par

    The vocabulary used on this site and around MediaSPIP in general, aims to avoid reference to Web 2.0 and the companies that profit from media-sharing.
    While using MediaSPIP, you are invited to avoid using words like "Brand", "Cloud" and "Market".
    MediaSPIP is designed to facilitate the sharing of creative media online, while allowing authors to retain complete control of their work.
    MediaSPIP aims to be accessible to as many people as possible and development is based on expanding the (...)

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

Sur d’autres sites (7479)

  • RTMP_ReadPacket, failed to read RTMP packet header rtmp ://a.rtmp.youtube.com/live2 : Unknown error occurred

    3 novembre 2018, par Orophix

    Here is the script I am trying to run, I believe the issue is in here :

    #!/bin/bash
    

    

    
GIF=/home/stream1/85012216.gif
    
STREAM_KEY=thisisasecret
    
URL=rtmp://a.rtmp.youtube.com/live2
    
FPS=30
    
KEYINT=$(expr $FPS \* 3)
    

    
$FFMPEG -f alsa -ac 2 -i hw:Loopback,1,0 -fflags +genpts -r $FPS -i $GIF \
    
-vcodec libx264 -x264opts keyint=$KEYINT:min-keyint=$KEYINT:scenecut=-1 -b:v 1000k \
    
-preset veryfast -pix_fmt yuv420p -s 854x480 \
    
-c:a libfdk_aac -b:a 96k -ar 44100 \
    
-f flv $URL

    The error :

    ffmpeg version N-92337-g8e50215b5e Copyright (c) 2000-2018 the FFmpeg
    developers built with gcc 7 (Ubuntu 7.3.0-27ubuntu1 18.04)
    configuration : —enable-shared —enable-gpl —enable-nonfree
    —enable-pthreads —enable-postproc —enable-libtheora —enable-version3 —enable-libx264 —enable-libfdk-aac —disable-stripping —disable-encoder=libschroedinger —enable-librtmp —enable-gnutls —enable-avfilter —enable-libfreetype —disable-decoder=amrnb —enable-fontconfig —disable-mips32r2 —disable-mipsdspr2 —disable-htmlpages —disable-podpages —disable-altivec —enable-libass —enable-omx —enable-omx-rpi libavutil 56. 23.100 / 56. 23.100 libavcodec 58. 36.100 /
    58. 36.100 libavformat 58. 21.100 / 58. 21.100 libavdevice 58. 6.100 / 58. 6.100 libavfilter 7. 43.100 / 7. 43.100 libswscale 5. 4.100 / 5. 4.100 libswresample 3. 4.100 /
    3. 4.100 libpostproc 55. 4.100 / 55. 4.100 Guessed Channel Layout for Input Stream #0.0 : stereo Input #0, alsa, from
    ’hw:Loopback,1,0’ : Duration : N/A, start : 1541258646.286883, bitrate :
    1536 kb/s
    Stream #0:0 : Audio : pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s Input #1, gif, from ’/home/stream1/85012216.gif’ : Duration : N/A,
    bitrate : N/A
    Stream #1:0 : Video : gif, bgra, 500x281, 16.67 fps, 16.67 tbr, 100 tbn, 100 tbc RTMP_ReadPacket, failed to read RTMP packet header
    rtmp ://a.rtmp.youtube.com/live2 : Unknown error occurred

    System details :

    Distributor ID: Ubuntu
    
Description:    Ubuntu 18.04.1 LTS
    
Release:        18.04
    
Codename:       bionic

  • ffpmeg drops last frame when compressing from MP4 to MP4 (libx264)

    28 octobre 2018, par Usoboi

    So, I’m using this code to compress my *mp4 file. I need to get lower quality and decrease bitrate :

    ffmpeg -i input.mp4 -c:v libx264 output.mp4

    The problem is : the last frame of footage is dropped after ffmpeg compression.
    Screenshot is here : screenshot_ffmpeg_drop frame

    I tried to use full preferences I need, but the problem is the same.

    ffmpeg -i input.mp4 -c:v libx264 -vf scale=1280:720 -preset fast -crf 29 -r 25 -c:a copy output.mp4

    logfile during ffmpeg encoding :

    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ’\input.mp4’ :
    Metadata :
    major_brand : mp42
    minor_version : 0
    compatible_brands : mp42mp41
    creation_time : 2018-10-28T11:06:03.000000Z
    Duration : 00:00:12.76, start : 0.000000, bitrate : 5374 kb/s
    Stream #0:0(eng) : Video : h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 5368 kb/s, 25 fps, 25 tbr, 50k tbn, 50 tbc (default)
    Metadata :
    creation_time : 2018-10-28T11:06:03.000000Z
    handler_name : Alias Data Handler
    encoder : AVC Coding

    Stream mapping : Stream #0:0 -> #0:0 (h264 (native) -> h264
    (libx264)) Press [q] to stop, [?] for help [libx264 @
    000002fae8b50780] using SAR=1/1 [libx264 @ 000002fae8b50780] using cpu
    capabilities : MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 [libx264 @
    000002fae8b50780] profile High, level 3.1 [libx264 @ 000002fae8b50780]
    264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft
    2003-2018 - http://www.videolan.org/x264.html - options : cabac=1 ref=2
    deblock=1:0:0 analyse=0x3:0x113 me=hex subme=6 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=12
    lookahead_threads=2 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=250
    keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=30 rc=crf
    mbtree=1 crf=29.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40
    aq=1:1.00 Output #0, mp4, to ’\output.mp4’ : Metadata :
    major_brand : mp42
    minor_version : 0
    compatible_brands : mp42mp41
    encoder : Lavf58.17.100
    Stream #0:0(eng) : Video : h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1—1, 25 fps, 12800 tbn, 25
    tbc (default)
    Metadata :
    creation_time : 2018-10-28T11:06:03.000000Z
    handler_name : Alias Data Handler
    encoder : Lavc58.19.104 libx264
    Side data :
    cpb : bitrate max/min/avg : 0/0/0 buffer size : 0 vbv_delay : -1

    frame= 318 fps=127 q=-1.0 Lsize= 855kB time=00:00:12.60 bitrate=
    556.0kbits/s speed=5.05x video:851kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead : 0.534683% [libx264 @
    0000015d5cef0500] frame I:2 Avg QP:26.18 size : 67800 [libx264 @
    0000015d5cef0500] frame P:80 Avg QP:27.93 size : 5439 [libx264 @
    0000015d5cef0500] frame B:236 Avg QP:32.44 size : 1269 [libx264 @
    0000015d5cef0500] consecutive B-frames : 0.9% 0.0% 0.9% 98.1%
    [libx264 @ 0000015d5cef0500] mb I I16..4 : 10.6% 62.5% 26.8% [libx264
    @ 0000015d5cef0500] mb P I16..4 : 0.5% 1.0% 0.2% P16..4 : 36.1%
    5.1% 3.6% 0.0% 0.0% skip:53.6% [libx264 @ 0000015d5cef0500] mb B I16..4 : 0.6% 0.5% 0.0% B16..8 : 22.2% 0.6% 0.0% direct : 2.0%
    skip:74.2% L0:44.9% L1:54.5% BI : 0.6% [libx264 @ 0000015d5cef0500]
    8x8 transform intra:55.0% inter:86.2% [libx264 @ 0000015d5cef0500]
    coded y,uvDC,uvAC intra : 48.1% 54.9% 27.0% inter : 3.2% 5.2% 0.2%
    [libx264 @ 0000015d5cef0500] i16 v,h,dc,p : 19% 56% 10% 15% [libx264 @
    0000015d5cef0500] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu : 19% 25% 18% 5% 6%
    5% 8% 5% 8% [libx264 @ 0000015d5cef0500] i4
    v,h,dc,ddl,ddr,vr,hd,vl,hu : 27% 24% 9% 5% 8% 7% 9% 5% 7%
    [libx264 @ 0000015d5cef0500] i8c dc,h,v,p : 60% 20% 15% 4% [libx264 @
    0000015d5cef0500] Weighted P-Frames : Y:0.0% UV:0.0% [libx264 @
    0000015d5cef0500] ref P L0 : 67.7% 32.3% [libx264 @ 0000015d5cef0500]
    ref B L0 : 80.4% 19.6% [libx264 @ 0000015d5cef0500] ref B L1 : 92.1%
    7.9% [libx264 @ 0000015d5cef0500] kb/s:547.35

  • ffmpeg how to select the audio channel with the biggest bps ?

    31 octobre 2018, par Kris Roofe

    I have mp4 file with below format,

    $ ffprobe -i 70_1.mp4 -hide_banner
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '70_1.mp4':
     Metadata:
       major_brand     : qt
       minor_version   : 0
       compatible_brands: qt
       creation_time   : 2018-10-30T08:57:38.000000Z
     Duration: 00:13:55.76, start: 0.000000, bitrate: 2246 kb/s
       Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, smpte170m/bt709/unknown, progressive), 1440x1920, 2118 kb/s, 58.75 fps, 60 tbr, 600 tbn, 1200 tbc (default)
       Metadata:
         creation_time   : 2018-10-30T08:57:38.000000Z
         handler_name    : Core Media Video
         encoder         : 'avc1'
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 2 kb/s (default)
       Metadata:
         creation_time   : 2018-10-30T08:57:38.000000Z
         handler_name    : Core Media Audio
       Stream #0:2(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 119 kb/s (default)
       Metadata:
         creation_time   : 2018-10-30T08:57:38.000000Z
         handler_name    : Core Media Audio

    As the auto channel is special, there is no sound when play in the browser.

    So I use ffmpeg to transfer it with ffmpeg -i 70_1.mp4 -crf 30 -b:a 23k -b:v 96k -threads 4 -map 0:0 -map 0:2 -y ooo.mp4, the generated mp4 file can play in the browser.

    $ ffprobe.exe ooo.mp4 -hide_banner
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ooo.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.17.101
     Duration: 00:13:55.79, start: 0.000000, bitrate: 246 kb/s
       Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc), 1440x1920, 209 kb/s, 60 fps, 60 tbr, 15360 tbn, 120 tbc (default)
       Metadata:
         handler_name    : Core Media Video
       Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 23 kb/s (default)
       Metadata:
         handler_name    : Core Media Audio

    But there is one issue, I need to process mp4 file with many formats, some with 1 audio channel, some with 2, So I want to know how to select the audio channel with the biggest bps.

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