Recherche avancée

Recherche
Choix de la période de publication
Date minimale :

Date maximale :

Type de date :
Choix de la langue
Choix du type de média
Choix de la rubrique
Choix de la licence de publication
Choix de l’auteur

Médias (1)

Mot : - Tags -/censure

Autres articles (105)

Personnaliser en ajoutant son logo, sa bannière ou son image de fond

5 septembre 2013, par kent1

Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
Ecrire une actualité

21 juin 2013, par etalarma

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 ) (...)
Le profil des utilisateurs

12 avril 2011, par kent1

Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 35

Sur d’autres sites (8600)

How Opensl es on android control the audio speed ?

6 décembre 2013, par user1882379
I use NDK+FFMPEG on android to decode an video file, and transfer the decoded pcm data to opensles for play audio .I register the opengles for the pcm format：
```
  SLDataFormat_PCM format_pcm;

    format_pcm.formatType = SL_DATAFORMAT_PCM;

    format_pcm.numChannels = channel;

    format_pcm.samplesPerSec = rate * 1000;

    format_pcm.bitsPerSample = SL_PCMSAMPLEFORMAT_FIXED_16;

    format_pcm.containerSize = SL_PCMSAMPLEFORMAT_FIXED_16;
```
also I convert the decoded pcm data to AV_SAMPLE_FMT_S16 format using swr_convert(...), but the play audio speed is very fast. but if you use sdl , the play speed is normal. It would be sdl can control the play audio speed, but opensles can not. I do not know whether it is my mistake using opensles or opensles can not control audio speed(need application to control)？

Video becomes choppy when the order in the hstack filter is changed

25 octobre 2018, par Mayank

I have a FFmpeg command wherein I am merging 2 videos side by side using hstack filter. When I place first video on the right hand side and second video on the left hand side, the final merged video is perfect in quality and plays smoothly.

However, when I swap the order in hstack filter, the final video is very choppy.

Can someone please let me know the issue in this command ? Many thanks in advance.

Also, the file size of the non working file is almost double than that of working file. Can you explain why ?

Here is the working command :

ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [3_v_silence][2:v]hstack" -preset ultrafast -y n_m_bars_try2.mp4

output :

ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 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-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-libzimg

  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

  libswscale      5.  1.100 /  5.  1.100

  libswresample   3.  1.100 /  3.  1.100

  libpostproc    55.  1.100 / 55.  1.100

Input #0, ogg, from '1_a.opus':

  Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s

    Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp

Input #1, ogg, from '2_a.opus':

  Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s

    Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp

Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf58.12.100

  Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s

    Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)

    Metadata:

      handler_name    : VideoHandler

Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf58.12.100

  Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s

    Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)

    Metadata:

      handler_name    : VideoHandler

Stream mapping:

  Stream #0:0 (opus) -> amix:input0

  Stream #1:0 (opus) -> adelay

  Stream #2:0 (h264) -> hstack:input1

  Stream #3:0 (h264) -> trim

  Stream #3:0 (h264) -> fifo

  amix -> Stream #0:0 (aac)

  hstack -> Stream #0:1 (libx264)

Press [q] to stop, [?] for help

[libx264 @ 0x528d600] using SAR=1/1

[libx264 @ 0x528d600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle

[libx264 @ 0x528d600] profile Constrained Baseline, level 3.1

[libx264 @ 0x528d600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0

Output #0, mp4, to 'navid_mayank_bars_try2.mp4':

  Metadata:

    encoder         : Lavf58.12.100

    Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)

    Metadata:

      encoder         : Lavc58.18.100 aac

    Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)

    Metadata:

      encoder         : Lavc58.18.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

frame= 1704 fps= 42 q=-1.0 Lsize=   14440kB time=00:01:08.12 bitrate=1736.5kbits/s dup=3 drop=21229 speed=1.69x    

video:13448kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.269503%

[aac @ 0x52b8680] Qavg: 22255.799

[libx264 @ 0x528d600] frame I:7     Avg QP:16.29  size: 46284

[libx264 @ 0x528d600] frame P:1697  Avg QP:18.36  size:  7924

[libx264 @ 0x528d600] mb I  I16..4: 100.0%  0.0%  0.0%

[libx264 @ 0x528d600] mb P  I16..4:  1.8%  0.0%  0.0%  P16..4: 31.0%  0.0%  0.0%  0.0%  0.0%    skip:67.2%

[libx264 @ 0x528d600] coded y,uvDC,uvAC intra: 29.9% 59.3% 17.5% inter: 13.4% 24.6% 0.8%

[libx264 @ 0x528d600] i16 v,h,dc,p: 36% 29% 18% 17%

[libx264 @ 0x528d600] i8c dc,h,v,p: 42% 25% 21% 11%

[libx264 @ 0x528d600] kb/s:1616.23

Non working command :

ffmpeg -i 1_a.opus -i 2_a.opus -itsoffset 0.024 -i 1_v.mp4 -itsoffset 0.113 -i 2_v.mp4 -filter_complex "[1:a]adelay=15646|15646[a1]; [0:a][a1]amix; [3:v]trim=0:15.646,geq=0:128:128[silence]; [3:v]fifo[3v]; [silence][3v]concat[3_v_silence]; [2:v][3_v_silence]hstack" -preset ultrafast -y m_n_bars_try2.mp4

output :

ffmpeg version 4.0.2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 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-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-libzimg

  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

  libswscale      5.  1.100 /  5.  1.100

  libswresample   3.  1.100 /  3.  1.100

  libpostproc    55.  1.100 / 55.  1.100

Input #0, ogg, from '1_a.opus':

  Duration: 00:01:03.82, start: -0.020000, bitrate: 37 kb/s

    Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp

Input #1, ogg, from '2_a.opus':

  Duration: 00:00:52.40, start: -0.020000, bitrate: 44 kb/s

    Stream #1:0: Audio: opus, 48000 Hz, stereo, fltp

Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '1_v.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf58.12.100

  Duration: 00:01:03.85, start: 0.000000, bitrate: 2644 kb/s

    Stream #2:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 2633 kb/s, 333 fps, 333 tbr, 10656 tbn, 666 tbc (default)

    Metadata:

      handler_name    : VideoHandler

Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '2_v.mp4':

  Metadata:

    major_brand     : isom

    minor_version   : 512

    compatible_brands: isomiso2avc1mp41

    encoder         : Lavf58.12.100

  Duration: 00:00:52.32, start: 0.000000, bitrate: 861 kb/s

    Stream #3:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], 860 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)

    Metadata:

      handler_name    : VideoHandler

Stream mapping:

  Stream #0:0 (opus) -> amix:input0

  Stream #1:0 (opus) -> adelay

  Stream #2:0 (h264) -> hstack:input0

  Stream #3:0 (h264) -> trim

  Stream #3:0 (h264) -> fifo

  amix -> Stream #0:0 (aac)

  hstack -> Stream #0:1 (libx264)

Press [q] to stop, [?] for help

[libx264 @ 0x6d21600] using SAR=1/1

[libx264 @ 0x6d21600] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle

[libx264 @ 0x6d21600] profile Constrained Baseline, level 5.1

[libx264 @ 0x6d21600] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0

Output #0, mp4, to 'mayank_navid_bars_try2.mp4':

  Metadata:

    encoder         : Lavf58.12.100

    Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)

    Metadata:

      encoder         : Lavc58.18.100 aac

    Stream #0:1: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1280x480 [SAR 1:1 DAR 8:3], q=-1--1, 333 fps, 10656 tbn, 333 tbc (default)

    Metadata:

      encoder         : Lavc58.18.100 libx264

    Side data:

      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

Past duration 0.999992 too large

    Last message repeated 12 times

More than 1000 frames duplicated   33280kB time=00:01:08.03 bitrate=4007.4kbits/s dup=982 drop=1590 speed=0.536x    

frame=22679 fps=177 q=-1.0 Lsize=   33892kB time=00:01:08.10 bitrate=4076.9kbits/s dup=1339 drop=1590 speed=0.531x    

video:32804kB audio:953kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.401324%

[aac @ 0x6d4c680] Qavg: 22255.799

[libx264 @ 0x6d21600] frame I:91    Avg QP:15.31  size: 51639

[libx264 @ 0x6d21600] frame P:22588 Avg QP:18.24  size:  1279

[libx264 @ 0x6d21600] mb I  I16..4: 100.0%  0.0%  0.0%

[libx264 @ 0x6d21600] mb P  I16..4:  0.2%  0.0%  0.0%  P16..4: 13.0%  0.0%  0.0%  0.0%  0.0%    skip:86.8%

[libx264 @ 0x6d21600] coded y,uvDC,uvAC intra: 44.9% 54.0% 29.9% inter: 2.0% 10.9% 0.1%

[libx264 @ 0x6d21600] i16 v,h,dc,p: 45% 24% 13% 18%

[libx264 @ 0x6d21600] i8c dc,h,v,p: 51% 20% 18% 11%

[libx264 @ 0x6d21600] kb/s:3945.79

ffmpeg : create a video from images and sounds

27 septembre 2018, par Yuri Gusak
You need to create a video from a set of pictures and sounds using ffmpeg.
Set of pictures : frame_% d.jpg
Sounds :
sound1.mp3 (from 0 ms)
sound2.mp3 (from 1000 ms)
sound3.mp3 (from 2000 ms)

I can create a video with one sound :
```
-i frame_% d.jpg -i sound1.mp3 -r 30 -s 1280x720 -preset ultrafast -crf 25 -shortest movie.mp4
```
and it works.

But I need to add some sounds at different times. How can I do that ? May be -filter_complex will help ?

1 | ... | 2678 | 2679 | 2680 | 2681 | 2682 | 2683 | 2684 | 2685 | 2686 | ... | 2867

Recherche avancée

Médias (1)

The pirate bay depuis la Belgique

Autres articles (105)

Personnaliser en ajoutant son logo, sa bannière ou son image de fond

Ecrire une actualité

Le profil des utilisateurs

Sur d’autres sites (8600)

How Opensl es on android control the audio speed ?

Video becomes choppy when the order in the hstack filter is changed

ffmpeg : create a video from images and sounds

Se connecter

Navigation

Syndication

Boussole SPIP