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Médias (1)

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Autres articles (38)

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • 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 ; (...)

  • 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 (5785)

  • vsync flag usage in ffmpeg while filtering

    13 octobre 2022, par antortjim

    I am trying to apply a threshold to an input video with ffmpeg, but I observe the following warning emitted for every processed frame

    


    [mp4 @ 0x56360181a200] Non-monotonous DTS in output stream 0:0; previous: 182272, current: 182272; changing to 182273. This may result in incorrect timestamps in the output file.


    


    where the previous and current are always 1 less than the value to which the DTS (Decoding Time Stamp) is changed

    


    I have noticed this warning is emitted only if I set -vsync passthrough (which I changed from the original -vsync 0 which is seen in many online examples).

    


    # input.mp4 has resolution 790x790
ffmpeg -vsync passthrough  -i input.mp4  -f lavfi -i color=808080:s=790x790 -f lavfi -i color=black:s=790x790 -f lavfi -i color=white:s=790x790 -filter_complex '[0:v][1:v][2:v][3:v]threshold' -an -c:v h264_nvenc threshold.mp4


    


    Shall I leave the vsync flag set to the default (auto or -1), or is -vsync passthrough essential to guarantee the frames are displayed in the right order ? In that case, how do I handle this warning ? Some other online examples I found of users experiencing this warning are different from mine, because in their case they are concatenating videos (see 1, 2

    


    From the documentation on the -vsync flag, at the end, I see :

    


    


    With -map you can select from which stream the timestamps should be taken. You can leave either video or audio unchanged and sync the remaining stream(s) to the unchanged one

    


    


    Maybe this warning should be handled with -map ? But I don't know how.

    


    Sidenote, I keep getting the deprecation warning asserting me to change -vsync for -fps_mode, however doing so breaks the command.

    


    FFPEG Version :

    


    commit 28ac2279adb860ea8b90d3073603912bf3eb6a83 from ffmpeg master branch

    


    ffmpeg version N-108625-g28ac2279ad Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)
configuration: --enable-nonfree --enable-cuda-nvcc --enable-libnpp --enable-gpl --extra-cflags=-I/usr/local/cuda/include --extra-ldflags=-L/usr/local/cuda/lib64 --disable-static --enable-shared
libavutil      57. 39.101 / 57. 39.101
libavcodec     59. 50.100 / 59. 50.100
libavformat    59. 34.101 / 59. 34.101
libavdevice    59.  8.101 / 59.  8.101
libavfilter     8. 49.101 /  8. 49.101
libswscale      6.  8.112 /  6.  8.112
libswresample   4.  9.100 /  4.  9.100
libpostproc    56.  7.100 / 56.  7.100


    


    OS

    


    Ubuntu 20.04.4 LTS

    


  • SIMD opus pvq_search implementation

    8 juin 2017, par Ivan Kalvachev
    SIMD opus pvq_search implementation

    Explanation on the workings and methods used by the
    
Pyramid Vector Quantization Search function
    
could be found in the following Work-In-Progress mail threads :
    
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212146.html
    
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212816.html
    
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213030.html
    
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-July/213436.html
    

    Signed-off-by : Ivan Kalvachev <ikalvachev@gmail.com>
    • [DH] libavcodec/opus_pvq.c
    • [DH] libavcodec/opus_pvq.h
    • [DH] libavcodec/x86/Makefile
    • [DH] libavcodec/x86/opus_dsp_init.c
    • [DH] libavcodec/x86/opus_pvq_search.asm

  • Could not write header for output file #0 (incorrect codec parameters ?) : No such file or directory

    1er juillet 2019, par playmaker420

    Im trying to trans code a mp4 file using the following command using a ffmpeg static build

    ./ffmpeg -i /tmp/tools/file_example.mp4 -map 0 -map 0 -map 0 -map 0 -c:v libx265 -f dash \
    
-b:v:0 25M -b:v:1 15M -b:v:2 6M -b:v:3 1M -maxrate 25M -bufsize 1835k -s:v:0 3840x2160 \
    
-s:v:1 3840x2160 -s:v:2 1920x1080 -s:v:3 1920x1080 -keyint_min 150 -g 150 \ /tmp/tools/example/4k.mpd

    On executing the command im getting the following exception

     ./ffmpeg -i /tmp/tools/file_example.mp4 -map 0 -map 0 -map 0 -map 0 -c:v libx265 -f dash -b:v:0 25M -b:v:1 15M -b:v:2 6M -b:v:3 1M -maxrate 25M -bufsize 1835k -s:v:0 3840x2160 -s:v:1 3840x2160 -s:v:2 1920x1080 -s:v:3 1920x1080 -keyint_min 150 -g 150 \ /tmp/tools/example/
    
ffmpeg version 4.1.3-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
  configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzvbi --enable-libzimg
    
  libavutil      56. 22.100 / 56. 22.100
    
  libavcodec     58. 35.100 / 58. 35.100
    
  libavformat    58. 20.100 / 58. 20.100
    
  libavdevice    58.  5.100 / 58.  5.100
    
  libavfilter     7. 40.101 /  7. 40.101
    
  libswscale      5.  3.100 /  5.  3.100
    
  libswresample   3.  3.100 /  3.  3.100
    
  libpostproc    55.  3.100 / 55.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/tools/file_example.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42mp41isomavc1
    
    creation_time   : 2015-08-07T09:13:36.000000Z
    
  Duration: 00:00:30.53, start: 0.000000, bitrate: 4675 kb/s
    
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 4486 kb/s, 30 fps, 30 tbr, 30 tbn, 60 tbc (default)
    
    Metadata:
    
      creation_time   : 2015-08-07T09:13:36.000000Z
    
      handler_name    : L-SMASH Video Handler
    
      encoder         : AVC Coding
    
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 256 kb/s (default)
    
    Metadata:
    
      creation_time   : 2015-08-07T09:13:36.000000Z
    
      handler_name    : L-SMASH Audio Handler
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
    
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
  Stream #0:0 -> #0:2 (h264 (native) -> hevc (libx265))
    
  Stream #0:1 -> #0:3 (aac (native) -> aac (native))
    
  Stream #0:0 -> #0:4 (h264 (native) -> hevc (libx265))
    
  Stream #0:1 -> #0:5 (aac (native) -> aac (native))
    
  Stream #0:0 -> #0:6 (h264 (native) -> hevc (libx265))
    
  Stream #0:1 -> #0:7 (aac (native) -> aac (native))
    
Press [q] to stop, [?] for help
    
x265 [info]: HEVC encoder version 3.0ed72af837053
    
x265 [info]: build info [Linux][GCC 6.3.0][64 bit] 8bit+10bit+12bit
    
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
x265 [info]: Main profile, Level-5 (Main tier)
    
x265 [info]: Thread pool created using 4 threads
    
x265 [info]: Slices                              : 1
    
x265 [info]: frame threads / pool features       : 2 / wpp(34 rows)
    
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
    
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
    
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 2
    
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
    
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
    
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
    
x265 [info]: References / ref-limit  cu / depth  : 3 / on / on
    
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
    
x265 [info]: Rate Control / qCompress            : ABR-25000 kbps / 0.60
    
x265 [info]: VBV/HRD buffer / max-rate / init    : 1835 / 25000 / 0.750
    
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
    
x265 [info]: tools: lslices=8 deblock sao
    
x265 [info]: HEVC encoder version 3.0ed72af837053
    
x265 [info]: build info [Linux][GCC 6.3.0][64 bit] 8bit+10bit+12bit
    
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
x265 [info]: Main profile, Level-5 (Main tier)
    
x265 [info]: Thread pool created using 4 threads
    
x265 [info]: Slices                              : 1
    
x265 [info]: frame threads / pool features       : 2 / wpp(34 rows)
    
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
    
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
    
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 2
    
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
    
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
    
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
    
x265 [info]: References / ref-limit  cu / depth  : 3 / on / on
    
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
    
x265 [info]: Rate Control / qCompress            : ABR-15000 kbps / 0.60
    
x265 [info]: VBV/HRD buffer / max-rate / init    : 1835 / 25000 / 0.750
    
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
    
x265 [info]: tools: lslices=8 deblock sao
    
x265 [info]: HEVC encoder version 3.0ed72af837053
    
x265 [info]: build info [Linux][GCC 6.3.0][64 bit] 8bit+10bit+12bit
    
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
x265 [info]: Main profile, Level-4 (High tier)
    
x265 [info]: Thread pool created using 4 threads
    
x265 [info]: Slices                              : 1
    
x265 [info]: frame threads / pool features       : 2 / wpp(17 rows)
    
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
    
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
    
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 2
    
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
    
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
    
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
    
x265 [info]: References / ref-limit  cu / depth  : 3 / on / on
    
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
    
x265 [info]: Rate Control / qCompress            : ABR-6000 kbps / 0.60
    
x265 [info]: VBV/HRD buffer / max-rate / init    : 1835 / 25000 / 0.750
    
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
    
x265 [info]: tools: lslices=6 deblock sao
    
x265 [info]: HEVC encoder version 3.0ed72af837053
    
x265 [info]: build info [Linux][GCC 6.3.0][64 bit] 8bit+10bit+12bit
    
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
x265 [info]: Main profile, Level-4 (High tier)
    
x265 [info]: Thread pool created using 4 threads
    
x265 [info]: Slices                              : 1
    
x265 [info]: frame threads / pool features       : 2 / wpp(17 rows)
    
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
    
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
    
x265 [info]: ME / range / subpel / merge         : hex / 57 / 2 / 2
    
x265 [info]: Keyframe min / max / scenecut / bias: 25 / 250 / 40 / 5.00
    
x265 [info]: Lookahead / bframes / badapt        : 20 / 4 / 2
    
x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 0
    
x265 [info]: References / ref-limit  cu / depth  : 3 / on / on
    
x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
    
x265 [info]: Rate Control / qCompress            : ABR-1000 kbps / 0.60
    
x265 [info]: VBV/HRD buffer / max-rate / init    : 1835 / 25000 / 0.750
    
x265 [info]: tools: rd=3 psy-rd=2.00 rskip signhide tmvp strong-intra-smoothing
    
x265 [info]: tools: lslices=6 deblock sao
    
[dash @ 0x5f21000] Opening ' /tmp/tools/example/init-stream0.m4s' for writingtrate=N/A speed=N/A    
    
Could not write header for output file #0 (incorrect codec parameters ?): No such file or directory
    
Error initializing output stream 0:7 -- 
    
x265 [info]: consecutive B-frames: 100.0% 0.0% 0.0% 0.0% 0.0% 
    

    
encoded 0 frames
    
[aac @ 0x5f30d00] Qavg: -nan
    
[aac @ 0x5f30d00] 1 frames left in the queue on closing
    
x265 [info]: consecutive B-frames: 100.0% 0.0% 0.0% 0.0% 0.0% 
    

    
encoded 0 frames
    
[aac @ 0x5f24ac0] Qavg: -nan
    
[aac @ 0x5f24ac0] 1 frames left in the queue on closing
    
x265 [info]: consecutive B-frames: 100.0% 0.0% 0.0% 0.0% 0.0% 
    

    
encoded 0 frames
    
[aac @ 0x5f33ec0] Qavg: -nan
    
[aac @ 0x5f33ec0] 1 frames left in the queue on closing
    
x265 [info]: consecutive B-frames: 100.0% 0.0% 0.0% 0.0% 0.0% 
    

    
encoded 0 frames
    
[aac @ 0x5f434c0] Qavg: -nan
    
Conversion failed!

    ffmpeg -version

    ./ffmpeg -version
    
ffmpeg version 4.1.3-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
    
built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
    
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzvbi --enable-libzimg
    
libavutil      56. 22.100 / 56. 22.100
    
libavcodec     58. 35.100 / 58. 35.100
    
libavformat    58. 20.100 / 58. 20.100
    
libavdevice    58.  5.100 / 58.  5.100
    
libavfilter     7. 40.101 /  7. 40.101
    
libswscale      5.  3.100 /  5.  3.100
    
libswresample   3.  3.100 /  3.  3.100
    
libpostproc    55.  3.100 / 55.  3.100

    Can someone help me to rectify the issue ?

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