Recherche avancée

Médias (3)

Mot : - Tags -/pdf

Autres articles (55)

  • Ecrire une actualité

    21 juin 2013, par

    Présentez les changements dans votre MédiaSPIP ou les actualités de vos projets sur votre MédiaSPIP grâce à la rubrique actualités.
    Dans le thème par défaut spipeo de MédiaSPIP, les actualités sont affichées en bas de la page principale sous les éditoriaux.
    Vous pouvez personnaliser le formulaire de création d’une actualité.
    Formulaire de création d’une actualité Dans le cas d’un document de type actualité, les champs proposés par défaut sont : Date de publication ( personnaliser la date de publication ) (...)

  • Contribute to a better visual interface

    13 avril 2011

    MediaSPIP is based on a system of themes and templates. Templates define the placement of information on the page, and can be adapted to a wide range of uses. Themes define the overall graphic appearance of the site.
    Anyone can submit a new graphic theme or template and make it available to the MediaSPIP community.

  • Les sons

    15 mai 2013, par

Sur d’autres sites (11274)

  • What do these FFmpeg APNG encoder prediction methods mean ?

    15 septembre 2021, par Nicke Manarin

    By running ffmpeg -h encoder=apng, I get this :

    


    APNG encoder AVOptions:&#xA;  -dpi               <int>        E..V..... Set image resolution (in dots per inch) (from 0 to 65536) (default 0)&#xA;  -dpm               <int>        E..V..... Set image resolution (in dots per meter) (from 0 to 65536) (default 0)&#xA;  -pred              <int>        E..V..... Prediction method (from 0 to 5) (default none)&#xA;     none                         E..V.....&#xA;     sub                          E..V.....&#xA;     up                           E..V.....&#xA;     avg                          E..V.....&#xA;     paeth                        E..V.....&#xA;     mixed                        E..V.....&#xA;</int></int></int>

    &#xA;

    What are the differences among these prediction methods specified with -pred ?

    &#xA;

    I could not find any documentation on ffmpeg.org or anywhere else.

    &#xA;

  • Frame rate very high for a muxer not efficiently supporting it

    24 décembre 2018, par DevDave

    I got an error when trying to run the following command with FFMpeg :

    -i "file1.mp4" -s 506x406 -b:v 2000k -ar 22050 "file2.mp4"

    FFMpeg was stuck converting this video, which was just a 7Mb .mp4 file, for hours and eventually I had to kill the process.

    The output error from FFMpeg is as follows :

    Converter Error Message: 
    
ffmpeg version N-42069-g3233ad4 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jun 30 2012 13:18:20 with gcc 4.7.1
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      51. 63.100 / 51. 63.100
    
  libavcodec     54. 31.100 / 54. 31.100
    
  libavformat    54. 14.100 / 54. 14.100
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     3.  0.100 /  3.  0.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'File1.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 1
    
    compatible_brands: mp42mp41
    
    creation_time   : 2013-07-18 15:38:11
    
  Duration: 00:02:02.23, start: -7.105889, bitrate: 518 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 718x574 [SAR 64:45 DAR 22976:12915], 361 kb/s, 24.97 fps, 90k tbr, 90k tbn, 180k tbc
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Video Media Handler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Sound Media Handler
    
[graph 0 input from stream 0:0 @ 0259cee0] w:718 h:574 pixfmt:yuv420p tb:1/90000 fr:90000/1 sar:64/45 sws_param:flags=2
    
[output stream 0:0 @ 0259cda0] No opaque field provided
    
[scaler for output stream 0:0 @ 0259c0e0] w:718 h:574 fmt:yuv420p sar:64/45 -> w:506 h:406 fmt:yuv420p sar:666304/466785 flags:0x4
    
**[mp4 @ 02599020] Frame rate very high for a muxer not efficiently supporting it.
    
Please consider specifying a lower framerate, a different muxer or -vsync 2**
    
[graph 1 input from stream 0:1 @ 02b88200] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
    
[auto-inserted resampler 0 @ 024e44e0] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:s16 r:22050Hz
    
[libx264 @ 02407200] using SAR=895/627
    
[libx264 @ 02407200] MB rate (74880000) > level limit (2073600)
    
[libx264 @ 02407200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
    
[libx264 @ 02407200] profile High, level 5.2
    
[libx264 @ 02407200] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'File2.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 1
    
    compatible_brands: mp42mp41
    
    encoder         : Lavf54.14.100
    
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 506x406 [SAR 666304:466785 DAR 22976:12915], q=-1--1, 2000 kb/s, 180k tbn, 90k tbc
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Video Media Handler
    
    Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 22050 Hz, stereo, s16, 128 kb/s
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Sound Media Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> libx264)
    
  Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
DTS -3600, next:-79995 st:0 invalid dropping
    
frame= 7201 fps=768 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=7198 drop=0    
    
frame=10801 fps=575 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=10797 drop=0    
    
frame=14401 fps=516 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=14396 drop=0    
    
frame=18001 fps=484 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=17995 drop=0    
    
frame=21601 fps=464 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=21594 drop=0    
    
frame=25201 fps=454 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=25193 drop=0    
    
.....

    And it just pretty much carries on like that until when I killed the process.

    Can anyone explain to me what is going on here and what I can do to fix this ?

  • Frame rate very high for a muxer not efficiently supporting it

    23 avril 2014, par DevDave

    I got an error when trying to run the following command with FFMpeg :

    -i "file1.mp4" -s 506x406 -b:v 2000k -ar 22050 "file2.mp4"

    FFMpeg was stuck converting this video, which was just a 7Mb .mp4 file, for hours and eventually I had to kill the process.

    The output error from FFMpeg is as follows :

    Converter Error Message: 
    
ffmpeg version N-42069-g3233ad4 Copyright (c) 2000-2012 the FFmpeg developers
    
  built on Jun 30 2012 13:18:20 with gcc 4.7.1
    
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r --enable-libass --enable-libcelt --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libnut --enable-libopenjpeg --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libutvideo --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
    
  libavutil      51. 63.100 / 51. 63.100
    
  libavcodec     54. 31.100 / 54. 31.100
    
  libavformat    54. 14.100 / 54. 14.100
    
  libavdevice    54.  0.100 / 54.  0.100
    
  libavfilter     3.  0.100 /  3.  0.100
    
  libswscale      2.  1.100 /  2.  1.100
    
  libswresample   0. 15.100 /  0. 15.100
    
  libpostproc    52.  0.100 / 52.  0.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'File1.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 1
    
    compatible_brands: mp42mp41
    
    creation_time   : 2013-07-18 15:38:11
    
  Duration: 00:02:02.23, start: -7.105889, bitrate: 518 kb/s
    
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 718x574 [SAR 64:45 DAR 22976:12915], 361 kb/s, 24.97 fps, 90k tbr, 90k tbn, 180k tbc
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Video Media Handler
    
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 129 kb/s
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Sound Media Handler
    
[graph 0 input from stream 0:0 @ 0259cee0] w:718 h:574 pixfmt:yuv420p tb:1/90000 fr:90000/1 sar:64/45 sws_param:flags=2
    
[output stream 0:0 @ 0259cda0] No opaque field provided
    
[scaler for output stream 0:0 @ 0259c0e0] w:718 h:574 fmt:yuv420p sar:64/45 -> w:506 h:406 fmt:yuv420p sar:666304/466785 flags:0x4
    
**[mp4 @ 02599020] Frame rate very high for a muxer not efficiently supporting it.
    
Please consider specifying a lower framerate, a different muxer or -vsync 2**
    
[graph 1 input from stream 0:1 @ 02b88200] tb:1/48000 samplefmt:s16 samplerate:48000 chlayout:0x3
    
[auto-inserted resampler 0 @ 024e44e0] chl:stereo fmt:s16 r:48000Hz -> chl:stereo fmt:s16 r:22050Hz
    
[libx264 @ 02407200] using SAR=895/627
    
[libx264 @ 02407200] MB rate (74880000) > level limit (2073600)
    
[libx264 @ 02407200] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64
    
[libx264 @ 02407200] profile High, level 5.2
    
[libx264 @ 02407200] 264 - core 125 r2200 999b753 - H.264/MPEG-4 AVC codec - Copyleft 2003-2012 - 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=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=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=2000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'File2.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 1
    
    compatible_brands: mp42mp41
    
    encoder         : Lavf54.14.100
    
    Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 506x406 [SAR 666304:466785 DAR 22976:12915], q=-1--1, 2000 kb/s, 180k tbn, 90k tbc
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Video Media Handler
    
    Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 22050 Hz, stereo, s16, 128 kb/s
    
    Metadata:
    
      creation_time   : 2013-07-18 15:38:11
    
      handler_name    : Apple Sound Media Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 -> libx264)
    
  Stream #0:1 -> #0:1 (aac -> libvo_aacenc)
    
Press [q] to stop, [?] for help
    
DTS -3600, next:-79995 st:0 invalid dropping
    
frame= 7201 fps=768 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=7198 drop=0    
    
frame=10801 fps=575 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=10797 drop=0    
    
frame=14401 fps=516 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=14396 drop=0    
    
frame=18001 fps=484 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=17995 drop=0    
    
frame=21601 fps=464 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=21594 drop=0    
    
frame=25201 fps=454 q=69.0 size=       0kB time=00:00:00.00 bitrate=   0.0kbits/s dup=25193 drop=0    
    
.....

    And it just pretty much carries on like that until when I killed the process.

    Can anyone explain to me what is going on here and what I can do to fix this ?

Navigation