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Autres articles (111)
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Le profil des utilisateurs
12 avril 2011, parChaque 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 (...) -
Configurer la prise en compte des langues
15 novembre 2010, parAccéder à la configuration et ajouter des langues prises en compte
Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...) -
XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...)
Sur d’autres sites (9473)
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FFmpeg : How to decrease the volume for few seconds in the middle of audio file ? [duplicate]
21 mai 2023, par harishkumar329I have an audio file with 120 seconds duration. I want to make the volume muted from 80th second to 100th second using FFmpeg.



Thanks in advance.


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ffmpeg Transcoding Stops After Few Seconds [migrated]
15 avril 2018, par Salem FI’m trying to do this over week now with no success,
What’s I’m trying to do is transcoding video from live streaming source and downscale it with FFmpeg, but every time I start transcoding it broadcasting for 11 sec and stop.The last command I tried :
ffmpeg -re -i 'http://source.com/1034.ts' -preset ultrafast http://localhost:2052/feed1.ffmI tried to download the .ts file with IDM and it finish downloading the file on the exact 12 Sec that FFmpeg stop trans coding on it.
Does that means that FFmpeg download that file as one segment and not continued reading the source video As what video players does usually. By the way, I tried with source with VLC player and it didn’t stop playing the the same source video.
I decided to pass FFmpeg command via FFserver config file
ffserver.confLaunch ffmpeg -i 'http://source.com/1.ts' -copyinkf -codec copyThe stream works fine for a while but after testing couple sources I notice it’s struggle to trans-coding HD videos.
I guess the issue with my VPS KVM server being very limited CPU and RAM ( 128MB only) ! Since I tried using
ultrafastpreset but din’t solve the issue, another thing, I notice when I enableAVOptionVideo crfsetting onffserver.conftrans-coding runs bit smoothly without frame-rate dropping.
Las my server usesXeon L5520CPU which is outdated CPU specially I gout 1/4 power of V single core (if they count HT it will be 1/8 of the real core) : (# vlc -I dummy 'https://source.com/1034.ts' --sout '#standard{access=http,mux=flv,dst=localhost:2052}'
VLC media player 2.2.8 Weatherwax (revision 2.2.7-14-g3cc1d8cba9)
[09d3fdf0] pulse audio output error: PulseAudio server connection failure: Connection refused
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "globalhotkeys,none" initialization failed
[09d279c0] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
[09d279c0] core interface error: no suitable interface module
[09c9b8f8] core libvlc error: interface "dbus,none" initialization failed
[09d279c0] dummy interface: using the dummy interface module...
[b5e04ae0] access_output_http access out: Consider passing --http-host=IP on the command line instead.
[b5e38ab8] ts demux: MPEG-4 descriptor not found for pid 0x101 type 0xf
[b5e90ae0] packetizer_mpeg4audio decoder: AAC channels: 2 samplerate: 48000
[flv @ 0xb5e33b40] dimensions not set
[b5e06360] avformat mux error: could not write header: Invalid argument
[b5e88ef0] core decoder error: cannot continue streaming due to errors
[b5e90ae0] core decoder error: cannot continue streaming due to errorsHere output with
-loglevel verbose:~# ffmpeg -i http://source.com/1.ts -copyinkf -codec copy -loglevel verbose http://127.0.0.1:8090/feed1.ffm
ffmpeg version 2.6.9 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/i386-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/i386-linux-gnu
libavutil 54. 20.100 / 54. 20.100
libavcodec 56. 26.100 / 56. 26.100
libavformat 56. 25.101 / 56. 25.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 11.102 / 5. 11.102
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Invalid UE golomb code
Last message repeated 2 times
Input #0, mpegts, from 'http://source.com/1.ts':
Duration: N/A, start: 30472.768167, bitrate: N/A
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 960x540 (960x544) [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 105 kb/s
[graph 0 input from stream 0:1 @ 0x971f2c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
[audio format for output stream 0:0 @ 0x9844de0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
[auto-inserted resampler 0 @ 0x97115e0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:1 chl:mono fmt:fltp r:22050Hz
[graph 1 input from stream 0:0 @ 0x96f5d00] w:960 h:540 pixfmt:yuv420p tb:1/90000 fr:50/1 sar:1/1 sws_param:flags=2
[scaler for output stream 0:1 @ 0x96f5e80] w:352 h:240 flags:'0x4' interl:0
[scaler for output stream 0:1 @ 0x96f5e80] w:960 h:540 fmt:yuv420p sar:1/1 -> w:352 h:240 fmt:yuv420p sar:40/33 flags:0x4
Output #0, ffm, to 'http://127.0.0.1:8090/feed1.ffm':
Metadata:
creation_time : now
encoder : Lavf56.25.101
Stream #0:0: Audio: wmav2, 22050 Hz, mono, fltp, 64 kb/s
Metadata:
encoder : Lavc56.26.100 wmav2
Stream #0:1: Video: msmpeg4v3 (msmpeg4), yuv420p, 352x240 [SAR 40:33 DAR 16:9], q=2-31, 256 kb/s, 50 fps, 1000k tbn, 15 tbc
Metadata:
encoder : Lavc56.26.100 msmpeg4
Stream mapping:
Stream #0:1 -> #0:0 (aac (native) -> wmav2 (native))
Stream #0:0 -> #0:1 (h264 (native) -> msmpeg4v3 (msmpeg4))
Press [q] to stop, [?] for help
Invalid UE golomb code
*** dropping frame 3 from stream 1 at ts 1
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 4 from stream 1 at ts 2
Last message repeated 1 times
*** dropping frame 5 from stream 1 at ts 3
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*** dropping frame 5 from stream 1 at ts 4
*** dropping frame 6 from stream 1 at ts 4
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*** dropping frame 7 from stream 1 at ts 5
Last message repeated 1 times
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
*** dropping frame 8 from stream 1 at ts 6
Last message repeated 1 times
*** dropping frame 8 from stream 1 at ts 7
*** dropping frame 9 from stream 1 at ts 7
Last message repeated 1 times
*** dropping frame 10 from stream 1 at ts 8
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 9
Last message repeated 1 times
*** dropping frame 11 from stream 1 at ts 10
*** dropping frame 12 from stream 1 at ts 10
Last message repeated 1 times
*** dropping frame 13 from stream 1 at ts 11
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 12
Last message repeated 1 times
*** dropping frame 14 from stream 1 at ts 13
*** dropping frame 15 from stream 1 at ts 13
Last message repeated 1 times
*** dropping frame 16 from stream 1 at ts 14
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 15
Last message repeated 1 times
*** dropping frame 17 from stream 1 at ts 16
*** dropping frame 18 from stream 1 at ts 16
Last message repeated 1 times
*** dropping frame 19 from stream 1 at ts 17
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 18me=00:00:01.33 bitrate= 270.3kbits/s dup=0 drop=39
Last message repeated 1 times
*** dropping frame 20 from stream 1 at ts 19
*** dropping frame 21 from stream 1 at ts 19
Last message repeated 1 times
*** dropping frame 22 from stream 1 at ts 20
Last message repeated 1 times
*** dropping frame 23 from stream 1 at ts 21
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*** dropping frame 23 from stream 1 at ts 22
*** dropping frame 24 from stream 1 at ts 22
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*** dropping frame 25 from stream 1 at ts 23
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*** dropping frame 26 from stream 1 at ts 24
Last message repeated 1 times
*** dropping frame 26 from stream 1 at ts 25
*** dropping frame 27 from stream 1 at ts 25
Last message repeated 1 times
*** dropping frame 28 from stream 1 at ts 26
Last message repeated 1 times
*** dropping frame 29 from stream 1 at ts 27
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*** dropping frame 29 from stream 1 at ts 28
*** dropping frame 30 from stream 1 at ts 28
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*** dropping frame 31 from stream 1 at ts 29
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*** dropping frame 32 from stream 1 at ts 30
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*** dropping frame 32 from stream 1 at ts 31
*** dropping frame 33 from stream 1 at ts 31
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*** dropping frame 34 from stream 1 at ts 32
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*** dropping frame 34 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 33
*** dropping frame 35 from stream 1 at ts 34
*** dropping frame 36 from stream 1 at ts 34
Last message repeated 1 times
*** dropping frame 37 from stream 1 at ts 35
Last message repeated 1 times
Invalid UE golomb code
*** dropping frame 38 from stream 1 at ts 36
Last message repeated 1 times
*** dropping frame 38 from stream 1 at ts 37
*** dropping frame 39 from stream 1 at ts 37
Last message repeated 1 times
*** dropping frame 40 from stream 1 at ts 38
Last message repeated 1 times
*** dropping frame 41 from stream 1 at ts 39me=00:00:02.73 bitrate= 311.7kbits/s dup=0 drop=88
Last message repeated 1 times
*** dropping frame 41 from stream 1 at ts 40
*** dropping frame 42 from stream 1 at ts 40
Last message repeated 1 times
*** dropping frame 43 from stream 1 at ts 41
Last message repeated 1 times
*** dropping frame 44 from stream 1 at ts 42
Last message repeated 1 times
*** dropping frame 44 from stream 1 at ts 43
*** dropping frame 45 from stream 1 at ts 43
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*** dropping frame 46 from stream 1 at ts 44
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*** dropping frame 47 from stream 1 at ts 45
Last message repeated 1 times
*** dropping frame 47 from stream 1 at ts 46
*** dropping frame 48 from stream 1 at ts 46
Last message repeated 1 times
*** dropping frame 49 from stream 1 at ts 47
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*** dropping frame 50 from stream 1 at ts 48
Last message repeated 1 times
*** dropping frame 50 from stream 1 at ts 49
*** dropping frame 51 from stream 1 at ts 49
Last message repeated 1 times
*** dropping frame 52 from stream 1 at ts 50
Last message repeated 1 times
*** dropping frame 53 from stream 1 at ts 51
Last message repeated 1 times
[h264 @ 0x9844a00] error while decoding MB 58 12, bytestream -5
[h264 @ 0x9844a00] concealing 1311 DC, 1311 AC, 1311 MV errors in B frame
*** dropping frame 53 from stream 1 at ts 52
No more output streams to write to, finishing.
frame= 55 fps= 42 q=4.3 Lsize= 152kB time=00:00:03.66 bitrate= 339.6kbits/s dup=0 drop=119
video:116kB audio:26kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.760316%
Input file #0 (http://source.com/1.ts):
Input stream #0:0 (video): 174 packets read (220322 bytes); 174 frames decoded;
Input stream #0:1 (audio): 156 packets read (36657 bytes); 156 frames decoded (159744 samples);
Total: 330 packets (256979 bytes) demuxed
Output file #0 (http://127.0.0.1:8090/feed1.ffm):
Output stream #0:0 (audio): 72 frames encoded (73383 samples); 72 packets muxed (26712 bytes);
Output stream #0:1 (video): 55 frames encoded; 55 packets muxed (119080 bytes);
Total: 127 packets (145792 bytes) muxedHere input URL file info After I download it to my PC with IDM
General
ID : 1 (0x1)
Complete name : D:\1.ts
Format : MPEG-TS
File size : 256 KiB
Duration : 2 s 520 ms
Overall bit rate mode : Variable
Overall bit rate : 788 kb/s
Video
ID : 256 (0x100)
Menu ID : 1 (0x1)
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings, CABAC : Yes
Format settings, RefFrames : 2 frames
Codec ID : 27
Duration : 2 s 680 ms
Width : 960 pixels
Height : 540 pixels
Display aspect ratio : 16:9
Frame rate : 50.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Audio
ID : 257 (0x101)
Menu ID : 1 (0x1)
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Muxing mode : ADTS
Codec ID : 15
Duration : 2 s 69 ms
Bit rate mode : Variable
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -12 ms
Menu
ID : 4096 (0x1000)
Menu ID : 1 (0x1)
Duration : 2 s 520 ms
List : 256 (0x100) (AVC) / 257 (0x101) (AAC)
Service name : Service01
Service provider : FFmpeg
Service type : digital television -
Why the video recorded using FFmpeg gives random freezes every few seconds and overall feels laggy too ?
12 avril 2018, par user136266Why the video recorded using FFmpeg gives random freezes every few seconds and overall feels laggy too (choppy video) ?
The command used is as follows
ffmpeg -f avfoundation -video_size 1280x720 -framerate 60 -input_format mjpeg -i "C922" -vcodec libx264 -crf output.mp4
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