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Valkaama DVD Cover Outside
4 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
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Valkaama DVD Cover Inside
4 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Image
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1,000,000
27 septembre 2011, par
Mis à jour : Septembre 2011
Langue : English
Type : Audio
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Demon Seed
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Mis à jour : Septembre 2011
Langue : English
Type : Audio
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The Four of Us are Dying
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Mis à jour : Septembre 2011
Langue : English
Type : Audio
Autres articles (97)
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Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP 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 (...) -
Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...) -
Installation en mode standalone
4 février 2011, parL’installation de la distribution MediaSPIP se fait en plusieurs étapes : la récupération des fichiers nécessaires. À ce moment là deux méthodes sont possibles : en installant l’archive ZIP contenant l’ensemble de la distribution ; via SVN en récupérant les sources de chaque modules séparément ; la préconfiguration ; l’installation définitive ;
[mediaspip_zip]Installation de l’archive ZIP de MediaSPIP
Ce mode d’installation est la méthode la plus simple afin d’installer l’ensemble de la distribution (...)
Sur d’autres sites (7756)
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FFmpeg : "Invalid data found when processing input" when reading video from memory
24 avril 2020, par DrawoceansI'm trying to read a mp4 video file from memory with C++ and FFmpeg library, but I got "Invalid data found when processing input" error. Here are my codes :



#include <cstdio>
#include <fstream>
#include <filesystem>

extern "C"
{
#include "libavformat/avformat.h"
#include "libavformat/avio.h"
}

using namespace std;
namespace fs = std::filesystem;

struct VideoBuffer
{
 uint8_t* ptr;
 size_t size;
};

static int read_packet(void* opaque, uint8_t* buf, int buf_size)
{
 VideoBuffer* vb = (VideoBuffer*)opaque;
 buf_size = FFMIN(buf_size, vb->size);

 if (!buf_size) {
 return AVERROR_EOF;
 }

 printf("ptr:%p size:%zu\n", vb->ptr, vb->size);

 memcpy(buf, vb->ptr, buf_size);
 vb->ptr += buf_size;
 vb->size -= buf_size;

 return buf_size;
}

void print_ffmpeg_error(int ret)
{
 char* err_str = new char[256];
 av_strerror(ret, err_str, 256);
 printf("%s\n", err_str);
 delete[] err_str;
}

int main()
{
 fs::path video_path = "test.mp4";
 ifstream video_file;
 video_file.open(video_path);
 if (!video_file) {
 abort();
 }
 size_t video_size = fs::file_size(video_path);
 char* video_ptr = new char[video_size];
 video_file.read(video_ptr, video_size);
 video_file.close();

 VideoBuffer vb;
 vb.ptr = (uint8_t*)video_ptr;
 vb.size = video_size;

 AVIOContext* avio = nullptr;
 uint8_t* avio_buffer = nullptr;
 size_t avio_buffer_size = 4096;
 avio_buffer = (uint8_t*)av_malloc(avio_buffer_size);
 if (!avio_buffer) {
 abort();
 }

 avio = avio_alloc_context(avio_buffer, avio_buffer_size, 0, &vb, read_packet, nullptr, nullptr);

 AVFormatContext* fmt_ctx = avformat_alloc_context();
 if (!fmt_ctx) {
 abort();
 }
 fmt_ctx->pb = avio;

 int ret = 0;
 ret = avformat_open_input(&fmt_ctx, nullptr, nullptr, nullptr);
 if (ret < 0) {
 print_ffmpeg_error(ret);
 }

 avformat_close_input(&fmt_ctx);
 av_freep(&avio->buffer);
 av_freep(&avio);
 delete[] video_ptr;
 return 0;
}
</filesystem></fstream></cstdio>


And here is what I got :



ptr:000001E10CEA0070 size:4773617
ptr:000001E10CEA1070 size:4769521
...
ptr:000001E10D32D070 size:1777
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001e10caaeac0] moov atom not found
Invalid data found when processing input



FFmpeg version is 4.2.2, with Windows 10 and Visual Studio 2019 in x64 Debug mode. FFmpeg library is the Windows compiled shared library from FFmpeg homepage. Some codes are from official example
avio_reading.c. Target MP4 file can be played normally by VLC player so I think the file is OK. Is anywhere wrong in my codes ? Or is it an FFmpeg library problem ?

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FFMpeg Concatenation Filters : Stream specifier ':0' in filtergraph matches no streams
8 décembre 2018, par Anthony EdenI am developing an application that relies heavily on FFMpeg to perform various transformations on audio files. I am currently testing my FFMpeg configuration on the command line.
I am trying to concatenate multiple audio files which are in different formats (Primarily MP3, MP2 & WAV). I have been using the official TRAC documentation (https://trac.ffmpeg.org/wiki/How%20to%20concatenate%20(join%2C%20merge)%20media%20files#differentcodec) to help me with this and have created the following command :
ffmpeg -i OHIn.wav -i OHOut.wav -filter_complex '[0:0] [1:0] concat=n=2:a=1 [a]' -map '[a]' output.wavHowever, when I run this on Mac OS X using version 2.0.1 of FFMpeg, I get the following error message :
Stream specifier ':0' in filtergraph description [0:0] [1:0] concat=n=2:a=1 [a] matches no streams.Here is my full output from the terminal :
~/ffmpeg -i OHIn.wav -i OHOut.wav -filter_complex '[0:0] [1:0] concat=n=2:a=1 [a]' -map '[a]' output.wav
ffmpeg version 2.0.1 Copyright (c) 2000-2013 the FFmpeg developers
built on Aug 15 2013 10:56:46 with llvm-gcc 4.2.1 (LLVM build 2336.11.00)
configuration: --prefix=/Volumes/Ramdisk/sw --enable-gpl --enable-pthreads --enable-version3 --enable-libspeex --enable-libvpx --disable-decoder=libvpx --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libx264 --enable-avfilter --enable-libopencore_amrwb --enable-libopencore_amrnb --enable-filters --enable-libgsm --arch=x86_64 --enable-runtime-cpudetect
libavutil 52. 38.100 / 52. 38.100
libavcodec 55. 18.102 / 55. 18.102
libavformat 55. 12.100 / 55. 12.100
libavdevice 55. 3.100 / 55. 3.100
libavfilter 3. 79.101 / 3. 79.101
libswscale 2. 3.100 / 2. 3.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 3.100 / 52. 3.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from 'OHIn.wav':
Duration: 00:00:06.71, bitrate: 1411 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'OHOut.wav':
Duration: 00:00:07.19, bitrate: 1411 kb/s
Stream #1:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s16, 1411 kb/s
Stream specifier ':0' in filtergraph description [0:0] [1:0] concat=n=2:a=1 [a] matches no streams.I do not understand why this does not work. FFMpeg shows that the streams 0:0 and 1:0 exist in the source files. The only other similar problems online have surrounded the use of the single quote in Windows, however testing of this confirm it does not apply to my Mac command line.
Any help would be much appreciated.
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FFMpeg Android Stagefright SIGSEGV error (h264 decode)
19 avril 2013, par Sergey OchkurI need to decode h264 file to YUV on Android 2.3+. As I understand I need to communicate with Stagefright, as it`s the only way now, after closing access with OpenMAX IL implementations. I have used FFmpeg 0.10 (and tried 0.9/0.9.1..) for this issue, compiled it with NDK7 (and also tried NDK6b with the same result) :
ffmpeg version 0.10 Copyright (c) 2000-2012 the FFmpeg developers
built on Jan 28 2012 14:42:37 with gcc 4.4.3
configuration: --target-os=linux --cross-prefix=arm-linux-androideabi- --arch=arm --cpu=armv7-a --sysroot=/home/grid/Android/Android_NDK/platforms/android-9/arch-arm --disable-avdevice --disable-decoder=h264 --disable-decoder=h264_vdpau --enable-libstagefright-h264 --prefix=build/stagefright/armeabi-v7a --extra-cflags='-Iandroid-source/frameworks/base/include -Iandroid-source/system/core/include -Iandroid-source/frameworks/base/media/libstagefright -Iandroid-source/frameworks/base/include/media/stagefright/openmax -I/home/grid/Android/Android_NDK/sources/cxx-stl/system/include -march=armv7-a -mfloat-abi=softfp -mfpu=neon' --extra-ldflags='-Wl,--fix-cortex-a8 -Landroid-libs -Wl,-rpath-link,android-libs' --extra-cxxflags='-Wno-multichar -fno-exceptions -fno-rtti'
libavutil 51. 34.101 / 51. 34.101
libavcodec 53. 60.100 / 53. 60.100
libavformat 53. 31.100 / 53. 31.100
libavfilter 2. 60.100 / 2. 60.100
libswscale 2. 1.100 / 2. 1.100
libswresample 0. 6.100 / 0. 6.100
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...Hardware : Beagleboard-Xm + TI Android 2.3 (official)
So, entering next command give me error with 480p :
ffmpeg -i /sdcard/Video/480p.mp4Stopped (signal) ffmpeg -i /sdcard/Video/480p.mp4
Full Android "answer" from ADB Logcat :
http://pastebin.com/76JLgtXXAndroid-developers, does anybody know what this error means and how to deal with it ?
I tried to make DSP window bigger, but with no luck.
Commands like "stagefright /sdcard/Video/480p.mp4" works fine.P.S. Additionally I found that on some bigger files (720p) Android answers next :
[libstagefright_h264 @ 0xd479b0] Decode failed : 80000000
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