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DJ Dolores - Oslodum 2004 (includes (cc) sample of “Oslodum” by Gilberto Gil)
15 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
Autres articles (78)
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Participer à sa traduction
10 avril 2011Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
Actuellement MediaSPIP n’est disponible qu’en français et (...) -
Creating farms of unique websites
13 avril 2011, parMediaSPIP platforms can be installed as a farm, with a single "core" hosted on a dedicated server and used by multiple websites.
This allows (among other things) : implementation costs to be shared between several different projects / individuals rapid deployment of multiple unique sites creation of groups of like-minded sites, making it possible to browse media in a more controlled and selective environment than the major "open" (...) -
HTML5 audio and video support
13 avril 2011, parMediaSPIP uses HTML5 video and audio tags to play multimedia files, taking advantage of the latest W3C innovations supported by modern browsers.
The MediaSPIP player used has been created specifically for MediaSPIP and can be easily adapted to fit in with a specific theme.
For older browsers the Flowplayer flash fallback is used.
MediaSPIP allows for media playback on major mobile platforms with the above (...)
Sur d’autres sites (12442)
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Call to avformat_find_stream_info prevents decoding of simple PNG image ?
10 avril 2014, par kloffyI am running into a problem decoding a simple PNG image with libav. The
decode_okflag after the call toavcodec_decode_video2is set to0, even though the packet contains the entire image. Through some experimentation, I have managed to pinpoint the issue and it seems related to callingavformat_find_stream_info. If the call is removed, the example runs successfully. However, I would like to use the same code for other media, and callingavformat_find_stream_infois recommended in the documentation.The following minimal example illustrates the behavior (unfortunately still a bit lengthy) :
#include <iostream>
extern "C"
{
#include <libavformat></libavformat>avformat.h>
#include <libavcodec></libavcodec>avcodec.h>
}
// Nothing to see here, it's just a helper function
AVCodecContext* open(AVMediaType mediaType, AVFormatContext* formatContext)
{
auto ret = 0;
if ((ret = av_find_best_stream(formatContext, mediaType, -1, -1, nullptr, 0)) < 0)
{
std::cerr << "Failed to find video stream." << std::endl;
return nullptr;
}
auto codecContext = formatContext->streams[ret]->codec;
auto codec = avcodec_find_decoder(codecContext->codec_id);
if (!codec)
{
std::cerr << "Failed to find codec." << std::endl;
return nullptr;
}
if ((ret = avcodec_open2(codecContext, codec, nullptr)) != 0)
{
std::cerr << "Failed to open codec context." << std::endl;
return nullptr;
}
return codecContext;
}
// All the interesting bits are here
int main(int argc, char* argv[])
{
auto path = "/path/to/test.png"; // Replace with valid path to PNG
auto ret = 0;
av_log_set_level(AV_LOG_DEBUG);
av_register_all();
avcodec_register_all();
auto formatContext = avformat_alloc_context();
if ((ret = avformat_open_input(&formatContext, path, NULL, NULL)) != 0)
{
std::cerr << "Failed to open input." << std::endl;
return -1;
}
av_dump_format(formatContext, 0, path, 0);
//*/ Info is successfully found, but interferes with decoding
if((ret = avformat_find_stream_info(formatContext, nullptr)) < 0)
{
std::cerr << "Failed to find stream info." << std::endl;
return -1;
}
av_dump_format(formatContext, 0, path, 0);
//*/
auto codecContext = open(AVMEDIA_TYPE_VIDEO, formatContext);
AVPacket packet;
av_init_packet(&packet);
if ((ret = av_read_frame(formatContext, &packet)) < 0)
{
std::cerr << "Failed to read frame." << std::endl;
return -1;
}
auto frame = av_frame_alloc();
auto decode_ok = 0;
if ((ret = avcodec_decode_video2(codecContext, frame, &decode_ok, &packet)) < 0 || !decode_ok)
{
std::cerr << "Failed to decode frame." << std::endl;
return -1;
}
av_frame_free(&frame);
av_free_packet(&packet);
avcodec_close(codecContext);
avformat_close_input(&formatContext);
av_free(formatContext);
return 0;
}
</iostream>The format dump before
avformat_find_stream_infoprints :Input #0, image2, from '/path/to/test.png' : Duration : N/A, bitrate : N/A Stream #0:0, 0, 1/25 : Video : png, 25 tbnThe format dump after
avformat_find_stream_infoprints :Input #0, image2, from '/path/to/test.png' : Duration : 00:00:00.04, start : 0.000000, bitrate : N/A Stream #0:0, 1, 1/25 : Video : png, rgba, 512x512 [SAR 3780:3780 DAR 1:1], 1/25, 25 tbr, 25 tbn, 25 tbcSo it looks like the search yields potentially useful information. Can anybody shed some light on this problem ? Other image formats seem to work fine. I assume that this is a simple user error rather than a bug.
Edit : Debug logging was already enabled, but the PNG decoder does not produce a lot of output. I have also tried setting a custom logging callback.
Here is what I get without the call to
avformat_find_stream_info, when decoding succeeds :Statistics : 52125 bytes read, 0 seeks
And here is what I get with the call to
avformat_find_stream_info, when decoding fails :Statistics : 52125 bytes read, 0 seeks
detected 8 logical cores
The image is 52125 bytes, so the whole file is read. I am not sure what the logical cores are referring to.
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ffmpeg conversion commandline needed [migrated]
8 avril 2014, par user3506221I want to ask for help on converting a mpg videofile recorded from TV
to a mp4 format my SAT Receiver can play, (mp4).
Below are the format infos of source and target output by ffmpeg -i :
All done on Linux.source :
Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv), 720x576 [SAR 64:45 DAR 16:9], max. 9500 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Stream #0:2[0x83]: Audio: ac3, 48000 Hz, stereo, fltp, 448 kb/starget :
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 720x406 [SAR 1:1 DAR 360:203], 1894 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)ffmpeg -i ./source.mpg
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Mar 24 2014 17:15:07 with gcc 4.8 (SUSE Linux)
configuration : —shlibdir=/usr/lib —prefix=/usr —mandir=/usr/share/man —libdir=/usr/lib —enable-shared —disable-static —enable-debug —disable-stripping —extra-cflags='-fomit-frame-pointer -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gsm' —enable-gpl —enable-x11grab —enable-version3 —enable-pthreads —enable-avfilter —enable-libpulse —enable-libvpx —enable-libopus —enable-libass —enable-libx265 —enable-libmp3lame —enable-libvorbis —enable-libtheora —enable-libspeex —enable-libxvid —enable-libx264 —enable-libschroedinger —enable-libgsm —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-postproc —enable-libdc1394 —enable-librtmp —enable-libfreetype —enable-avresample —enable-libtwolame —enable-libvo-aacenc —enable-gnutls
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libavresample 1. 2. 0 / 1. 2. 0
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
[NULL @ 0x82baf20] start time is not set in estimate_timings_from_pts
Input #0, mpeg, from './Rossini.mpg' :
Duration : 01:49:08.19, start : 0.252622, bitrate : 4815 kb/s
Stream #0:0[0x1bf] : Data : dvd_nav_packet
Stream #0:1[0x1e0] : Video : mpeg2video (Main), yuv420p(tv), 720x576 [SAR 64:45 DAR 16:9], max. 9500 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
Stream #0:2[0x83] : Audio : ac3, 48000 Hz, stereo, fltp, 448 kb/s
At least one output file must be specifiedffmpeg -i ./target.mp4
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Mar 24 2014 17:15:07 with gcc 4.8 (SUSE Linux)
configuration : —shlibdir=/usr/lib —prefix=/usr —mandir=/usr/share/man —libdir=/usr/lib —enable-shared —disable-static —enable-debug —disable-stripping —extra-cflags='-fomit-frame-pointer -fmessage-length=0 -grecord-gcc-switches -fstack-protector -O2 -Wall -D_FORTIFY_SOURCE=2 -funwind-tables -fasynchronous-unwind-tables -g -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -I/usr/include/gsm' —enable-gpl —enable-x11grab —enable-version3 —enable-pthreads —enable-avfilter —enable-libpulse —enable-libvpx —enable-libopus —enable-libass —enable-libx265 —enable-libmp3lame —enable-libvorbis —enable-libtheora —enable-libspeex —enable-libxvid —enable-libx264 —enable-libschroedinger —enable-libgsm —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-postproc —enable-libdc1394 —enable-librtmp —enable-libfreetype —enable-avresample —enable-libtwolame —enable-libvo-aacenc —enable-gnutls
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libavresample 1. 2. 0 / 1. 2. 0
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './target.mp4' :
Metadata :
major_brand : mp42
minor_version : 0
compatible_brands : isommp42
creation_time : 2014-03-31 22:03:51
Duration : 01:20:35.84, start : 0.000000, bitrate : 1992 kb/s
Stream #0:0(und) : Video : h264 (Main) (avc1 / 0x31637661), yuv420p(tv), 720x406 [SAR 1:1 DAR 360:203], 1894 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata :
creation_time : 2014-03-31 22:03:51
handler_name : Mainconcept MP4 Video Media Handler
Stream #0:1(und) : Audio : aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 93 kb/s (default)
Metadata :
creation_time : 2014-03-31 22:03:51
handler_name : Mainconcept MP4 Sound Media Handler
At least one output file must be specified -
Does ffmpeg version 0.7 support -codec copy option ? [migrated]
2 avril 2014, par Boris ŠuškaI have to use ffmpeg version 0.7.15 to merge video (without audio) and audio file into one video file with audio. I would like to use command ffmpeg without re-encoding.
I used this with newer version of ffmpeg command
ffmpeg -y -i "video.mp4" -i "audio.mp4" -c:v copy -c:a copy -strict experimental -map 0:v:0 -map 1:a:0 "output.mp4"I need similar command for version 0.7.15, this is not working :
ffmpeg -y -i "video.mp4" -i "audio.mp4" -vcodec copy -acodec copy -strict experimental -map 0:v:0 -map 1:a:0 "output.mp4"but this command works :
ffmpeg -y -i "video.mp4" -i "audio.mp4" -vcodec libx264 -acodec aac -strict experimental -map 0:v:0 -map 1:a:0 "output.mp4"Does ffmpeg version 0.7.x support
-vcodec copyand-acodec copyor something similar ? If no which first version supports this ?Update :
-vcodec copy -acodec copyis not working for version 0.7.15 means if I have two files :-rwxrwxrwx 1 vagrant vagrant 2066268 Apr 1 11:41 audio.mp4
-rwxrwxrwx 1 vagrant vagrant 33172453 Apr 1 11:41 video.mp4and I run
ffmpegcommand with-vcodec copyand-acodec copyoptions I get this output :ffmpeg version 0.7.15, Copyright (c) 2000-2013 the FFmpeg developers
built on Feb 22 2013 07:18:58 with gcc 4.4.5
configuration: --enable-libdc1394 --prefix=/usr --extra-cflags='-Wall -g ' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --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-avfilter --enable-libdirac --disable-decoder=libdirac --enable-libfreetype --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-libvpx --enable-librtmp --extra-libs=-lgcrypt --disable-altivec --disable-armv5te --disable-armv6 --disable-vis
libavutil 50. 43. 0 / 50. 43. 0
libavcodec 52.123. 0 / 52.123. 0
libavformat 52.111. 0 / 52.111. 0
libavdevice 52. 5. 0 / 52. 5. 0
libavfilter 1. 80. 0 / 1. 80. 0
libswscale 0. 14. 1 / 0. 14. 1
libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2014-01-01 01:05:45
Duration: 00:04:19.92, start: 129.960000, bitrate: 1021 kb/s
Stream #0.0(und): Video: h264 (High), yuv420p, 1920x1080, 25 tbr, 90k tbn, 50 tbc
Metadata:
creation_time : 2014-01-01 01:05:45
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'audio.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6mp41
creation_time : 2014-01-01 01:03:43
Duration: 00:04:20.10, start: 130.054966, bitrate: 63 kb/s
Stream #1.0(und): Audio: aac, 44100 Hz, stereo, s16
Metadata:
creation_time : 2014-01-01 01:03:43
Output #0, mp4, to 'output.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2014-01-01 01:05:45
encoder : Lavf52.111.0
Stream #0.0(und): Video: libx264, yuv420p, 1920x1080, q=2-31, 25 tbn, 25 tbc
Metadata:
creation_time : 2014-01-01 01:05:45
Stream #0.1(und): Audio: libfaac, 44100 Hz, stereo
Metadata:
creation_time : 2014-01-01 01:03:43
Stream mapping:
Stream #0.0 -> #0.0
Stream #1.0 -> #0.1 [sync #0.0]
Press [q] to stop, [?] for help
frame= 0 fps= 0 q=-1.0 Lsize= 2038kB time=00:00:00.00 bitrate= 0.0kbits/s
video:0kB audio:1994kB global headers:0kB muxing overhead 2.229202%and new
output.mp4file is tooo small and contains only audio :-rwxrwxrwx 1 vagrant vagrant 2066268 Apr 1 11:41 audio.mp4
-rwxrwxrwx 1 vagrant vagrant 2087185 Apr 2 08:07 output.mp4
-rwxrwxrwx 1 vagrant vagrant 33172453 Apr 1 11:41 video.mp4Output of newer version of
ffmpeg(Windows version here) looks like this :ffmpeg version N-58288-g80e5859 Copyright (c) 2000-2013 the FFmpeg developers
built on Nov 19 2013 18:06:56 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --en
able-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame -
-enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 53.100 / 52. 53.100
libavcodec 55. 43.101 / 55. 43.101
libavformat 55. 21.100 / 55. 21.100
libavdevice 55. 5.100 / 55. 5.100
libavfilter 3. 91.100 / 3. 91.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
creation_time : 2014-01-01 01:05:45
Duration: 00:02:09.96, start: 0.000000, bitrate: 2042 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080, 2039 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata:
creation_time : 2014-01-01 01:05:45
handler_name : VideoHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'audio.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6mp41
creation_time : 2014-01-01 01:03:43
Duration: 00:02:10.05, start: 0.000000, bitrate: 127 kb/s
Stream #1:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
Metadata:
creation_time : 2014-01-01 01:03:43
handler_name : SoundHandler
Output #0, mp4, to 'output.mp4':
Metadata:
major_brand : dash
minor_version : 0
compatible_brands: iso6avc1mp41
encoder : Lavf55.21.100
Stream #0:0(und): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1920x1080, q=2-31, 2039 kb/s, 25 fps, 90k tbn, 90k tbc (default)
Metadata:
creation_time : 2014-01-01 01:05:45
handler_name : VideoHandler
Stream #0:1(und): Audio: aac ([64][0][0][0] / 0x0040), 44100 Hz, stereo, 125 kb/s (default)
Metadata:
creation_time : 2014-01-01 01:03:43
handler_name : SoundHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 3249 fps=0.0 q=-1.0 Lsize= 34438kB time=00:02:10.05 bitrate=2169.2kbits/s
video:32354kB audio:1994kB subtitle:0 global headers:0kB muxing overhead 0.262659%and
output.mp4file size is higher than only video file and contains video and audio streams-rwxrwxrwx 1 vagrant vagrant 2066268 Apr 1 11:41 audio.mp4
-rwxrwxrwx 1 vagrant vagrant 35264183 Apr 2 08:15 output.mp4
-rwxrwxrwx 1 vagrant vagrant 33172453 Apr 1 11:41 video.mp4
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