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  • 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
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  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
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    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • 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.
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  • ffmpeg command for faster encoding at a decent bitrate with smaller file size

    14 septembre 2016, par Blair Holmes

    I’m currently using an implementation of ffmpeg on my android app. I’m allowing users to take short videos within my app and then when they upload them to the server, I’m crunching them down with ffmpeg to decrease file size so they’re not passing huge amounts of data over the wire.

    the problem is, it’s taking forever to encode the videos on the android device. These videos usually aren’t longer than 45 seconds and can take 20 minutes to encode. I’ve done some playing around with different switches / parameters on the ffmpeg command line and I now have it at a more comfortable time, but the file sizes are significantly bigger. I’m just not sure what codec I should use (fastest encoding but with decent quality output), how ffmpeg handles changing size (aspect ratio) in terms of speed of encoding etc.

    Here are the two commands I’ve been using. This first one outputs the file size / quality that I want, but it just takes way too long to encode, not to mention it makes my device get really hot while it’s encoding for so long :

    ffmpeg -i input.mp4 -b:v 1024k -c:a copy -vf scale=960:540 output.mp4

    I’ve tweaked the bitrate some on that as well as changed the scale to a smaller size, but I don’t want to have to make the videos really small (in terms of scale) to accomplish a faster encoding. this second command goes a lot faster but makes the file size significantly bigger :

    ffmpeg -i input.mp4 -vcodec libx264 -preset fast -c:a copy -s 960x540 output.mp4

    I’d like to find a happy medium (smaller file size but faster encoding) keeping the video scale size close to the original. ffmpeg just has so many different parameters / switches that it’s difficult to wrap my head around what I should be doing.

    EDIT : adding ffmpeg output.

    ffmpeg -i input.mp4 -vcodec libx264 -crf 30 -preset veryfast -c:a copy -s 960x540 output.mp4

        09-13 11:06:28.330 10881-10881/someapp D/home: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
    
09-13 11:06:28.330 10881-10881/someapp D/home:   built with gcc 4.8 (GCC)
    
09-13 11:06:28.331 10881-10881/someapp D/home:   configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libavutil      55. 17.103 / 55. 17.103
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libavcodec     57. 24.102 / 57. 24.102
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libavformat    57. 25.100 / 57. 25.100
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libavdevice    57.  0.101 / 57.  0.101
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libavfilter     6. 31.100 /  6. 31.100
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libswscale      4.  0.100 /  4.  0.100
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libswresample   2.  0.101 /  2.  0.101
    
09-13 11:06:28.331 10881-10881/someapp D/home:   libpostproc    54.  0.100 / 54.  0.100
    
09-13 11:06:28.430 10881-10881/someapp D/home: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/ExpeditionSpot/Videos/20160913110411.mp4':
    
09-13 11:06:28.430 10881-10881/someapp D/home:   Metadata:
    
09-13 11:06:28.430 10881-10881/someapp D/home:     major_brand     : mp42
    
09-13 11:06:28.430 10881-10881/someapp D/home:     minor_version   : 0
    
09-13 11:06:28.430 10881-10881/someapp D/home:     compatible_brands: isommp42
    
09-13 11:06:28.430 10881-10881/someapp D/home:     creation_time   : 2016-09-13 17:04:33
    
09-13 11:06:28.430 10881-10881/someapp D/home:     com.android.version: 6.0.1
    
09-13 11:06:28.430 10881-10881/someapp D/home:   Duration: 00:00:19.41, start: 0.000000, bitrate: 20222 kb/s
    
09-13 11:06:28.430 10881-10881/someapp D/home:     Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 19963 kb/s, SAR 1:1 DAR 16:9, 30.03 fps, 30 tbr, 90k tbn, 180k tbc (default)
    
09-13 11:06:28.430 10881-10881/someapp D/home:     Metadata:
    
09-13 11:06:28.430 10881-10881/someapp D/home:       creation_time   : 2016-09-13 17:04:33
    
09-13 11:06:28.430 10881-10881/someapp D/home:       handler_name    : VideoHandle
    
09-13 11:06:28.431 10881-10881/someapp D/home:     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
    
09-13 11:06:28.431 10881-10881/someapp D/home:     Metadata:
    
09-13 11:06:28.431 10881-10881/someapp D/home:       creation_time   : 2016-09-13 17:04:33
    
09-13 11:06:28.431 10881-10881/someapp D/home:       handler_name    : SoundHandle
    
09-13 11:06:28.448 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] using SAR=1/1
    
09-13 11:06:28.448 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] using cpu capabilities: none!
    
09-13 11:06:28.516 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] profile High, level 3.1
    
09-13 11:06:28.516 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] 264 - core 148 - 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=12 lookahead_threads=4 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=10 rc=crf mbtree=1 crf=27.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
09-13 11:06:28.532 10881-10881/someapp D/home: Output #0, mp4, to '/storage/emulated/0/ExpeditionSpot/.tmp/small-20160913110411.mp4':
    
09-13 11:06:28.532 10881-10881/someapp D/home:   Metadata:
    
09-13 11:06:28.532 10881-10881/someapp D/home:     major_brand     : mp42
    
09-13 11:06:28.533 10881-10881/someapp D/home:     minor_version   : 0
    
09-13 11:06:28.533 10881-10881/someapp D/home:     compatible_brands: isommp42
    
09-13 11:06:28.533 10881-10881/someapp D/home:     com.android.version: 6.0.1
    
09-13 11:06:28.533 10881-10881/someapp D/home:     encoder         : Lavf57.25.100
    
09-13 11:06:28.533 10881-10881/someapp D/home:     Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 960x540 [SAR 1:1 DAR 16:9], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
    
09-13 11:06:28.533 10881-10881/someapp D/home:     Metadata:
    
09-13 11:06:28.533 10881-10881/someapp D/home:       creation_time   : 2016-09-13 17:04:33
    
09-13 11:06:28.533 10881-10881/someapp D/home:       handler_name    : VideoHandle
    
09-13 11:06:28.533 10881-10881/someapp D/home:       encoder         : Lavc57.24.102 libx264
    
09-13 11:06:28.533 10881-10881/someapp D/home:     Side data:
    
09-13 11:06:28.533 10881-10881/someapp D/home:       unknown side data type 10 (24 bytes)
    
09-13 11:06:28.533 10881-10881/someapp D/home:     Stream #0:1(eng): Audio: aac (LC) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, 96 kb/s (default)
    
09-13 11:06:28.533 10881-10881/someapp D/home:     Metadata:
    
09-13 11:06:28.533 10881-10881/someapp D/home:       creation_time   : 2016-09-13 17:04:33
    
09-13 11:06:28.533 10881-10881/someapp D/home:       handler_name    : SoundHandle
    
09-13 11:06:28.533 10881-10881/someapp D/home: Stream mapping:
    
09-13 11:06:28.533 10881-10881/someapp D/home:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
09-13 11:06:28.533 10881-10881/someapp D/home:   Stream #0:1 -> #0:1 (copy)
    
09-13 11:06:28.533 10881-10881/someapp D/home: Press [q] to stop, [?] for help
    
09-13 11:06:29.102 10881-10881/someapp D/home: frame=    7 fps=0.0 q=0.0 size=       0kB time=00:00:01.04 bitrate=   0.4kbits/s speed=2.08x    
    
09-13 11:06:29.699 10881-10881/someapp D/home: frame=   16 fps= 15 q=0.0 size=       0kB time=00:00:01.04 bitrate=   0.4kbits/s speed=0.998x    
    
....
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] frame I:3     Avg QP:26.83  size: 21896
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] frame P:279   Avg QP:28.76  size:  5859
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] frame B:296   Avg QP:29.93  size:   863
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] consecutive B-frames: 18.3% 32.2% 23.9% 25.6%
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] mb I  I16..4: 16.9% 54.2% 28.9%
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] mb P  I16..4:  7.7%  9.1%  0.4%  P16..4: 27.5% 11.1%  4.0%  0.0%  0.0%    skip:40.1%
    
09-13 11:07:12.674 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] mb B  I16..4:  0.8%  0.6%  0.0%  B16..8: 10.9%  2.4%  0.1%  direct: 1.8%  skip:83.5%  L0:35.8% L1:54.2% BI:10.0%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] 8x8 transform intra:52.0% inter:41.3%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] coded y,uvDC,uvAC intra: 28.9% 26.0% 2.1% inter: 6.4% 5.0% 0.0%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] i16 v,h,dc,p: 57% 20% 17%  6%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 33% 23% 34%  1%  2%  1%  3%  2%  2%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 36% 21% 17%  2%  7%  4%  6%  4%  4%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] i8c dc,h,v,p: 59% 16% 23%  2%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] Weighted P-Frames: Y:16.8% UV:4.7%
    
09-13 11:07:12.675 10881-10881/someapp D/home: [libx264 @ 0xf71c4400] kb/s:812.09

  • 360 VR video to static ?

    7 octobre 2016, par SuperPrower

    So, I have simple 360 (or 180, I’m not really sure since I can’t play it) degrees side-by-side VR video, but my phone is so old, so it’s can play that kind of video, not matter what player I use (I was able to see few frames from such a video, but they were static or applications was crashing).

    Is there any way to convert such video into static one ? I understand that I will lost ability to rotate my head, but I don’t really care since my phone don’t have a gyroscope.

    I want to create simple side-by-side video which I could play with any player - I understand that I can lost quality and effect, but as I said, I don’t really care, since this is just something fun which I want to try.

  • moviepy ffmpeg stderr to tkinter interface

    14 octobre 2016, par Alexander Perlman

    Hi stackoverflow community,

    I’m a novice python hobbyist. I wrote a python / ffmpeg script using moviepy that batch concatenates videos. I then designed an interface using tkinter.

    Now I want to redirect the stderr output from FFMPEG to the tkinter interface so that users can review the progress directly in app instead of needing the Sublime text console.

    I’ve done a lot of research but I’m in way over my head. Any tips would be greatly appreciated.

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