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Autres articles (37)
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Demande de création d’un canal
12 mars 2010, parEn fonction de la configuration de la plateforme, l’utilisateur peu avoir à sa disposition deux méthodes différentes de demande de création de canal. La première est au moment de son inscription, la seconde, après son inscription en remplissant un formulaire de demande.
Les deux manières demandent les mêmes choses fonctionnent à peu près de la même manière, le futur utilisateur doit remplir une série de champ de formulaire permettant tout d’abord aux administrateurs d’avoir des informations quant à (...) -
MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Mise à disposition des fichiers
14 avril 2011, parPar défaut, lors de son initialisation, MediaSPIP ne permet pas aux visiteurs de télécharger les fichiers qu’ils soient originaux ou le résultat de leur transformation ou encodage. Il permet uniquement de les visualiser.
Cependant, il est possible et facile d’autoriser les visiteurs à avoir accès à ces documents et ce sous différentes formes.
Tout cela se passe dans la page de configuration du squelette. Il vous faut aller dans l’espace d’administration du canal, et choisir dans la navigation (...)
Sur d’autres sites (7874)
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how to extract a metadata track from MP4 file
6 mars 2016, par raviI need to extract metadata track from a MP4 file and save as separate file. I see that, using ffmpeg I can extract standard tracks like Audio or Video or Subtitle track and save it as a new file. For ex : to save audio track I use the command below :
ffmpeg -i input-video.avi -vn -acodec copy output-audio.aacBut my need is to save a proprietary metadata track. Any pointers will be helpful.
Here is output of
ffmpegto know different traks that are present in the file. Particuarly, I am interested in extracting track corresponding to Stream #0:3(eng)...C:\Users\rkumar\Documents\work\tools\ffmpeg\bin>ffmpeg.exe -i input.MP4
ffmpeg version N-57176-g64b3aaf Copyright (c) 2000-2013 the FFmpeg developers
built on Oct 15 2013 21:32:52 with gcc 4.8.1 (GCC)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.MP4':
Metadata:
major_brand : mp41
minor_version : 538120216
compatible_brands: mp41
creation_time : 1970-01-01 00:00:09
Duration: 00:00:10.52, start: 0.000000, bitrate: 834 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt709),
854x480 [SAR 1:1 DAR 427:240], 679 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : AVC
timecode : 00:00:13:22
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : AAC
timecode : 00:00:13:22
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : TCD
timecode : 00:00:13:22
Stream #0:3(eng): Data: none (ssmd / 0x646D7067), 5 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : MET
Stream #0:4(eng): Data: none (fdsc / 0x63736466), 10 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : SOS -
ffmpeg android java. Unable to use single and regular quotes
14 février 2016, par MalusDarkbFirst off, in the long run I want to implement a speedometer for a MP4 file using Android. I did some research and apparently the best way to do that is through FFmpeg. I decided on using this library : https://github.com/WritingMinds/ffmpeg-android-java . It implements FFmpeg for Android. It was quite simple to include into my project. (Instructions : http://writingminds.github.io/ffmpeg-android-java/)
I use the following method. As cmd I am using a String in Quotations marks
ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {
...
};Now I was trying to overlay some dynamic text over an MP4 file. I thought I would start trying it with a timestamp. For a timestamp something like this is needed : ... timecode=’02:36:17~;00’ ...
My Problem is I am getting this error " Unable to find a suitable output format for ’’’. It doesn’t matter if i try to use "\" (escaping) or if i try to use regular quotes. Whenever I use some kind of quotation mark I am getting an error. That makes it impossible to use an dynamic timestamp. I think.
Does anyone have an idea as to how I can fix this ? Keep in mind the timecode is within a String in an Android(Java) class.
Thanks in advance for your help
EDIT :
Can someone provide me with a working command ? The cmd 1-3 work, but 4 and 5 don’t work (even as String[]).
String cmd1 = "-i /storage/emulated/0/dir1/dir2/TestVideo.MP4 -i /storage/emulated/0/dir1/dir2/logo.png -preset ultrafast -filter_complex overlay=10:main_h-overlay_h-10 -acodec: copy /storage/emulated/0/dir1/dir2/LogoOverlay1.mp4";// working PNG overlay
String cmd2 = "-i /storage/emulated/0/dir1/dir2/TestVideo.MP4 -i /storage/emulated/0/dir1/dir2/logo.png -preset ultrafast -filter_complex overlay=(main_w-overlay_w)/2:(main_h-overlay_h)/2 -acodec: copy /storage/emulated/0/dir1/dir2/LogoOverlay2.mp4";// working PNG overlay
String cmd3 = "-i /storage/emulated/0/dir1/dir2/TestVideo.MP4 -i /storage/emulated/0/dir1/dir2/logo.png -preset ultrafast -filter_complex [0:v][1:v]overlay=main_w-overlay_w-10:main_h-overlay_h-10[out] -map [out] -map 0:a -acodec: copy /storage/emulated/0/dir1/dir2/LogoOverlay3.mp4";// working PNG overlay
String cmd4 = "-i /storage/emulated/0/dir1/dir2/TestVideo2.MP4 -vf drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf: text=\'Stack Overflow\': fontcolor=white: fontsize=24: box=1: boxcolor=black: x=(w-text_w)/2: y=(h-text_h-line_h)/2\" -acodec: copy /storage/emulated/0/dir1/dir2/TextOverlay.mp4";
String cmd5 = "-i /storage/emulated/0/dir1/dir2/TestVideo2.MP4 -vf \'transpose=1\' /storage/emulated/0/dir1/dir2/rotated.mp4"; //rotate video
String[] cmd4arr = new String[]{"-i", "/storage/emulated/0/dir1/dir2/TestVideo.MP4", "-vf", "drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf: text='Stack Overflow': fontcolor=white: fontsize=24: box=1: boxcolor=black: x=(w-text_w)/2: y=(h-text_h-line_h)/2", "-acodec:", "copy /storage/emulated/0/dir1/dir2/TextOverlay.mp4"};
String[] cmd5arr = new String[]{"-i", "/storage/emulated/0/dir1/dir2/TestVideo2.MP4","-preset","ultrafast", "-vf", "\'transpose=1\'", "/storage/emulated/0/dir1/dir2/rotated.mp4"};
String[] cmd4ArrAlt = new String[]{"-i", "/storage/extSdCard/DCIM/Camera/Test.MP4", "-vf", "drawtext=fontfile=/usr/share/fonts/TTF/Vera.ttf:", "text=\'Stack Overflow\':", "fontcolor=white:", "fontsize=24:", "box=1:", "boxcolor=black:", "x=(w-text_w)/2:", "y=(h-text_h-line_h)/2", "-acodec:", "copy", "/storage/emulated/0/dir/TextOverlay.mp4"};cmd4arr produces this Log :
.../MainActivity﹕ onProgress ffmpeg version n2.4.2 Copyright (c) 2000-2014 the FFmpeg developers
.../MainActivity﹕ onProgress built on Oct 7 2014 15:08:46 with gcc 4.8 (GCC)
.../MainActivity﹕ onProgress configuration: --target-os=linux --cross-prefix=/home/sb/Source-Code/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/sb/Source-Code/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/sb/Source-Code/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/sb/Source-Code/ffmpeg-android/build/armeabi-v7a-neon --extra-cflags='-I/home/sb/Source-Code/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all -mfpu=neon' --extra-ldflags='-L/home/sb/Source-Code/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
.../MainActivity﹕ onProgress libavutil 54. 7.100 / 54. 7.100
.../MainActivity﹕ onProgress libavcodec 56. 1.100 / 56. 1.100
.../MainActivity﹕ onProgress libavformat 56. 4.101 / 56. 4.101
.../MainActivity﹕ onProgress libavdevice 56. 0.100 / 56. 0.100
.../MainActivity﹕ onProgress libavfilter 5. 1.100 / 5. 1.100
.../MainActivity﹕ onProgress libswscale 3. 0.100 / 3. 0.100
.../MainActivity﹕ onProgress libswresample 1. 1.100 / 1. 1.100
.../MainActivity﹕ onProgress libpostproc 53. 0.100 / 53. 0.100
.../MainActivity﹕ onProgress Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/dir1/dir2/TestVideo2.MP4':
.../MainActivity﹕ onProgress Metadata:
.../MainActivity﹕ onProgress major_brand : isom
.../MainActivity﹕ onProgress minor_version : 512
.../MainActivity﹕ onProgress compatible_brands: isomiso2mp41
.../MainActivity﹕ onProgress creation_time : 1970-01-01 00:00:00
.../MainActivity﹕ onProgress encoder : Lavf53.24.2
.../MainActivity﹕ onProgress Duration: 00:00:06.40, start: 0.000000, bitrate: 1321 kb/s
.../MainActivity﹕ onProgress Stream #0:0(und): Video: mpeg4 (Simple Profile) (mp4v / 0x7634706D), yuv420p, 640x368 [SAR 1:1 DAR 40:23], 932 kb/s, 25 fps, 25 tbr, 12800 tbn, 25 tbc (default)
.../MainActivity﹕ onProgress Metadata:
.../MainActivity﹕ onProgress creation_time : 1970-01-01 00:00:00
.../MainActivity﹕ onProgress handler_name : VideoHandler
.../MainActivity﹕ onProgress Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
.../MainActivity﹕ onProgress Metadata:
.../MainActivity﹕ onProgress creation_time : 1970-01-01 00:00:00
.../MainActivity﹕ onProgress handler_name : SoundHandlercmd4ArrAlt produces this Log :
.
.
.
/MainA: onProgress: handler_name : SoundHandle
/MainA: onProgress: [NULL @ 0xb5ec4a00] Unable to find a suitable output format for 'text='Stack Overflow':'
/MainA: onProgress: text='Stack Overflow':: Invalid argumentcmd4arr and cmd5arr create an new MP4 file. But it has a size of 0KB. The commands seem not to process the frames at all. It always stops with this last line of the Log posted above.
Edit :
Answered question : "What how can I use a String [ ] with this Library ? Information on that might fix the other issues."
Answer : I imported the project as arr before. When it is imported as a regular library you can’t use a normal String anymore but it is implemented as an String[].
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avcodec/utils : Check that the video data[] arrays are NULL on the input to get_buffer...
26 février 2016, par Michael Niedermayeravcodec/utils : Check that the video data[] arrays are NULL on the input to get_buffer_internal()
This should return an error to the decoder if the struct it tried to getbuffer is dirty
Reviewed-by : Reimar Döffinger <Reimar.Doeffinger@gmx.de>
Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
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