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Autres articles (20)

  • Websites made ​​with MediaSPIP

    2 mai 2011, par

    This page lists some websites based on MediaSPIP.

  • Creating farms of unique websites

    13 avril 2011, par

    MediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
    This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...)

  • Other interesting software

    13 avril 2011, par

    We don’t claim to be the only ones doing what we do ... and especially not to assert claims to be the best either ... What we do, we just try to do it well and getting better ...
    The following list represents softwares that tend to be more or less as MediaSPIP or that MediaSPIP tries more or less to do the same, whatever ...
    We don’t know them, we didn’t try them, but you can take a peek.
    Videopress
    Website : http://videopress.com/
    License : GNU/GPL v2
    Source code : (...)

Sur d’autres sites (6929)

  • avdevice/sdl2 : add option to set window position

    1er octobre 2018, par Dave Rice
    avdevice/sdl2 : add option to set window position

    Allows arrangement of multiple windows such as :
    
ffmpeg -re -f lavfi -i mandelbrot -f sdl -window_x 1 -window_y 1 mandelbrot -vf waveform,format=yuv420p -f sdl -window_x 641 -window_y 1 waveform -vf vectorscope,format=yuv420p -f sdl -window_x 1 -window_y 481 vectorscop
    

    Some changes by Marton Balint :

    - allow negative position (partially or fully out-of-screen positions seem to
    
  be sanitized automatically by SDL (or my WM ?), so no special handling is
    
  needed)

    - only show window after the position is set

    - do not use resizable and borderless flags at the same time, that caused
    
  issues in ffplay

    - add docs
    

    Signed-off-by : Marton Balint <cus@passwd.hu>
    • [DH] doc/outdevs.texi
    • [DH] libavdevice/sdl2.c
    • [DH] libavdevice/version.h

  • How to get a list of libraries ffmpeg has linked to (static ffmpeg libraries) ?

    6 octobre 2018, par myWallJSON

    I have compiled Ffmpeg (1.0) with newt configuration :

    ./configure  --disable-doc  --disable-ffplay --disable-ffprobe  --disable-ffserver    --disable-avdevice   --disable-avfilter   --disable-pthreads  --disable-everything --enable-muxer=flv --enable-encoder=flv --enable-encoder=h263 --disable-mmx  --disable-shared   --prefix=bin/  --disable-protocols --disable-network --disable-debug  --disable-asm --disable-stripping

    It compiled - no errors - headers and libs (static .a) are in place. (special experimental cigwin, experimental gcc, with no asm options, and no known by ffmpeg platform defines) (yet I have compiled and tested boost on it)

    Now I try to compile my app. I get next exceptions :

    ../ffmpeg-1.0/bin/lib/libavcodec.a: error: undefined reference to 'exp'
    
../ffmpeg-1.0/bin/lib/libavcodec.a: error: undefined reference to 'log'

    My compiler build line looks like this :

    g++ -static -emit-swf -o CloudClient.swf  -I../boost/boost_libraries/install-dir/include -I../ffmpeg-1.0/bin/include -L../boost/boost_libraries/install-dir/lib -L../ffmpeg-1.0/bin/lib \
    
    timer.o \
    
    audio_encoder.o \
    
    audio_generator.o \
    
    video_encoder.o \
    
    video_generator_rainbow.o \
    
    simple_synchronizer.o \
    
    multiplexer.o \
    
    transmitter.o \
    
    graph_runner.o \
    
    cloud_client.o \
    
    -pthread \
    
    -lswscale \
    
    -lavutil \
    
    -lavformat \
    
    -lavcodec \
    
    -lboost_system \
    
    -lboost_date_time \
    
    -lboost_thread

    So as you see quite complex and I already have all object files compiled and ready... Only one thing left - link it all to ffmpeg (striped from ffmpeg version compiled with boost)

    Tried adding -lm - no help...

    Well here my question is - how to get list of libraries ffmpeg linked to (like -lm etc) ?

  • How to write mp4 metadata with ffmpeg without affecting the video data

    13 juillet 2018, par Daniel Quinn

    I’m trying to write metadata to a video file in one step, and capture the "raw data" (no metadata) portion of a video file in another step. The trouble is, with MP4 files, adding metadata to the file appears to alter the raw video data as well, while MKV files act as expected. Here’s an example with two files : test.mkv and test.mp4 :

    MKV

    ffmpeg -i test.mkv -loglevel error -metadata 'arbitrary=string' -codec copy test-new-metadata.mkv
    

    
ffmpeg -i test.mkv              -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
631becf821dca89b150120d25393491a  -
    

    
ffmpeg -i test-new-metadata.mkv -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
631becf821dca89b150120d25393491a  -

    MP4

    ffmpeg -i test.mp4 -loglevel error -metadata 'arbitrary=string' -codec copy test-new-metadata.mp4
    

    
ffmpeg -i test.mp4              -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
b9b28e4ac500be961bd07290a34cf93f  -
    

    
ffmpeg -i test-new-metadata.mp4 -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
d13e7177fae9b341994bc1ee8f3812bc  -

    ...and now webm, just to see if I’m losing my mind :

    Webm

    ffmpeg -i test.webm -loglevel error -metadata 'arbitrary=string' -codec copy test-new-metadata.webm
    

    
ffmpeg -i test.webm              -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
a62e053d3dbf627db4d77c5165152a81  -
    

    
ffmpeg -i test-new-metadata.webm -loglevel error -map 0:v:0 -c copy -f data - -map 0:a:0 -c copy -f data - | md5sum
    
a62e053d3dbf627db4d77c5165152a81  -

    So I’m left wondering if my understanding of how to capture the raw video is misinformed, or if MP4 is "special" in some way. Note that I’m not interested in using ffmpeg’s own hashing functions as I want to run the raw data through an external process. The use of md5sum here is just to test if the output is identical.

    Update : As requested, I’m including the output of the metadata writing step for MP4 files :

    $ ffmpeg -i test.mp4 -metadata 'arbitrary=string' -codec copy test-new-metadata.mp4
    
ffmpeg version 4.0.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 8.1.1 (GCC) 20180531
    
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-avresample --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-nvenc --enable-omx --enable-shared --enable-version3
    
  libavutil      56. 14.100 / 56. 14.100
    
  libavcodec     58. 18.100 / 58. 18.100
    
  libavformat    58. 12.100 / 58. 12.100
    
  libavdevice    58.  3.100 / 58.  3.100
    
  libavfilter     7. 16.100 /  7. 16.100
    
  libavresample   4.  0.  0 /  4.  0.  0
    
  libswscale      5.  1.100 /  5.  1.100
    
  libswresample   3.  1.100 /  3.  1.100
    
  libpostproc    55.  1.100 / 55.  1.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'test.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42isomavc1
    
    creation_time   : 2010-03-20T21:29:11.000000Z
    
    encoder         : HandBrake 0.9.4 2009112300
    
  Duration: 00:00:05.57, start: 0.000000, bitrate: 551 kb/s
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 560x320, 465 kb/s, 30 fps, 30 tbr, 90k tbn, 60 tbc (default)
    
    Metadata:
    
      creation_time   : 2010-03-20T21:29:11.000000Z
    
      encoder         : JVT/AVC Coding
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 83 kb/s (default)
    
    Metadata:
    
      creation_time   : 2010-03-20T21:29:11.000000Z
    
Output #0, mp4, to 'test-new-metadata.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42isomavc1
    
    arbitrary       : string
    
    encoder         : Lavf58.12.100
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, bt709), 560x320, q=2-31, 465 kb/s, 30 fps, 30 tbr, 90k tbn, 90k tbc (default)
    
    Metadata:
    
      creation_time   : 2010-03-20T21:29:11.000000Z
    
      encoder         : JVT/AVC Coding
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, mono, fltp, 83 kb/s (default)
    
    Metadata:
    
      creation_time   : 2010-03-20T21:29:11.000000Z
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)
    
  Stream #0:1 -> #0:1 (copy)
    
Press [q] to stop, [?] for help
    
frame=  166 fps=0.0 q=-1.0 Lsize=     377kB time=00:00:05.54 bitrate= 556.7kbits/s speed=4.07e+03x    
    
video:315kB audio:56kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.609490%

    Update 2 : Here’s a link to the misbehaving mp4 file (375k).

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