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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (54)
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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 (...) -
Les statuts des instances de mutualisation
13 mars 2010, parPour des raisons de compatibilité générale du plugin de gestion de mutualisations avec les fonctions originales de SPIP, les statuts des instances sont les mêmes que pour tout autre objets (articles...), seuls leurs noms dans l’interface change quelque peu.
Les différents statuts possibles sont : prepa (demandé) qui correspond à une instance demandée par un utilisateur. Si le site a déjà été créé par le passé, il est passé en mode désactivé. publie (validé) qui correspond à une instance validée par un (...) -
L’agrémenter visuellement
10 avril 2011MediaSPIP est basé sur un système de thèmes et de squelettes. Les squelettes définissent le placement des informations dans la page, définissant un usage spécifique de la plateforme, et les thèmes l’habillage graphique général.
Chacun peut proposer un nouveau thème graphique ou un squelette et le mettre à disposition de la communauté.
Sur d’autres sites (9457)
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Anomalie #2774 : #INTRODUCTION, fonction couper() et effactement de contenus ""
2 mars 2013, par marcimat -J’ai reproduis aussi… Ça vient du fait que le texte est coupé à 2 fois la longueur de l’introduction (2*500 pour les articles soit à 1000 caractères) par le filtre_introduction_dist(). Mais couper() se plante dans la coupe lamentablement. On peut tester dans un squelette avec : #ref]" ; #$texte = (...)
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huffyuvdec : implement trick
3 juin 2014, par Christophe Gisquethuffyuvdec : implement trick
When the joint table does not contain a valid entry, the decoding restarts
from scratch. By implementing the trick of jumping to the 2nd level of the
individual table (and inlining the whole), a speed improvement of 5-10%
is possible.On a 1000-frames YUV4:2:0 video, before :
362851 decicycles in 422, 262094 runs, 50 skips
182488 decicycles in gray, 262087 runs, 57 skips
Object size : 23584
Overall time : 8.377After :
346800 decicycles in 422, 262079 runs, 65 skips
168197 decicycles in gray, 262077 runs, 67 skips
Object size : 23188
Overall time : 7.878Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
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Android FFmpeg Video Player
11 mars 2013, par DilipI want to play video using
FFmpeg
for this have used some code,But it open file but not drawing frames thowing Unhandled page fault exception.Java Code :
public class MainActivity extends Activity {
private static native void openFile();
private static native void drawFrame(Bitmap bitmap);
private static native void drawFrameAt(Bitmap bitmap, int secs);
private Bitmap mBitmap;
private int mSecs = 0;
static {
System.loadLibrary("ffmpegutils");
}
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// setContentView(new VideoView(this));
setContentView(R.layout.main);
mBitmap = Bitmap.createBitmap(320, 240, Bitmap.Config.ARGB_8888);
openFile();
Button btn = (Button) findViewById(R.id.frame_adv);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
try {
drawFrame(mBitmap);
ImageView i = (ImageView) findViewById(R.id.frame);
i.setImageBitmap(mBitmap);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}}Jni code :
#include
#include
#include
#include <android></android>log.h>
#include <android></android>bitmap.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
#define LOG_TAG "FFMPEGSample"
#define LOGI(...) __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)
#define LOGE(...) __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)
/* Cheat to keep things simple and just use some globals. */
AVFormatContext *pFormatCtx;
AVCodecContext *pCodecCtx;
AVFrame *pFrame;
AVFrame *pFrameRGB;
int videoStream;
/*
* Write a frame worth of video (in pFrame) into the Android bitmap
* described by info using the raw pixel buffer. It's a very inefficient
* draw routine, but it's easy to read. Relies on the format of the
* bitmap being 8bits per color component plus an 8bit alpha channel.
*/
static void fill_bitmap(AndroidBitmapInfo* info, void *pixels, AVFrame *pFrame) {
uint8_t *frameLine;
int yy;
for (yy = 0; yy < info->height; yy++) {
uint8_t* line = (uint8_t*) pixels;
frameLine = (uint8_t *) pFrame->data[0] + (yy * pFrame->linesize[0]);
int xx;
for (xx = 0; xx < info->width; xx++) {
int out_offset = xx * 4;
int in_offset = xx * 3;
line[out_offset] = frameLine[in_offset];
line[out_offset + 1] = frameLine[in_offset + 1];
line[out_offset + 2] = frameLine[in_offset + 2];
line[out_offset + 3] = 0;
}
pixels = (char*) pixels + info->stride;
}
}
void Java_com_churnlabs_ffmpegsample_MainActivity_openFile(JNIEnv * env,
jobject this) {
int ret;
int err;
int i;
AVCodec *pCodec;
uint8_t *buffer;
int numBytes;
av_register_all();
LOGE("Registered formats***********************************");
err = av_open_input_file(&pFormatCtx, "file:///mnt/sdcard/android.3gp",
NULL, 0, NULL);
LOGE("Called open file***************************************************");
if (err != 0) {
LOGE(
"Couldn't open file****************************************************");
return;
}
LOGE(
"Opened file***********************************************************");
if (av_find_stream_info(pFormatCtx) < 0) {
LOGE(
"Unable to get stream info*****************************************");
return;
}
videoStream = -1;
for (i = 0; i < pFormatCtx->nb_streams; i++) {
if (pFormatCtx->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO) {
videoStream = i;
break;
}
}
if (videoStream == -1) {
LOGE("Unable to find video stream");
return;
}
LOGI("Video stream is [%d]", videoStream);
pCodecCtx = pFormatCtx->streams[videoStream]->codec;
pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
if (pCodec == NULL) {
LOGE("Unsupported codec**********************************************");
return;
}
if (avcodec_open(pCodecCtx, pCodec) < 0) {
LOGE("Unable to open codec***************************************");
return;
}
pFrame = avcodec_alloc_frame();
pFrameRGB = avcodec_alloc_frame();
LOGI("Video size is [%d x %d]", pCodecCtx->width, pCodecCtx->height);
numBytes = avpicture_get_size(PIX_FMT_RGB24, pCodecCtx->width,
pCodecCtx->height);
buffer = (uint8_t *) av_malloc(numBytes * sizeof(uint8_t));
avpicture_fill((AVPicture *) pFrameRGB, buffer, PIX_FMT_RGB24,
pCodecCtx->width, pCodecCtx->height);
}
void Java_com_churnlabs_ffmpegsample_MainActivity_drawFrame(JNIEnv * env,
jobject this, jstring bitmap) {
AndroidBitmapInfo info;
void* pixels;
int ret;
int err;
int i;
int frameFinished = 0;
AVPacket packet;
static struct SwsContext *img_convert_ctx;
int64_t seek_target;
if ((ret = AndroidBitmap_getInfo(env, bitmap, &info)) < 0) {
LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);
return;
}
LOGE(
"Checked on the bitmap*************************************************");
if ((ret = AndroidBitmap_lockPixels(env, bitmap, &pixels)) < 0) {
LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);
}
LOGE(
"Grabbed the pixels*******************************************************");
i = 0;
while ((i == 0) && (av_read_frame(pFormatCtx, &packet) >= 0)) {
if (packet.stream_index == videoStream) {
avcodec_decode_video2(pCodecCtx, pFrame, &frameFinished, &packet);
if (frameFinished) {
LOGE("packet pts %llu", packet.pts);
// This is much different than the tutorial, sws_scale
// replaces img_convert, but it's not a complete drop in.
// This version keeps the image the same size but swaps to
// RGB24 format, which works perfect for PPM output.
int target_width = 320;
int target_height = 240;
img_convert_ctx = sws_getContext(pCodecCtx->width,
pCodecCtx->height, pCodecCtx->pix_fmt, target_width,
target_height, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL,
NULL);
if (img_convert_ctx == NULL) {
LOGE("could not initialize conversion context\n");
return;
}
sws_scale(img_convert_ctx,
(const uint8_t* const *) pFrame->data, pFrame->linesize,
0, pCodecCtx->height, pFrameRGB->data,
pFrameRGB->linesize);
// save_frame(pFrameRGB, target_width, target_height, i);
fill_bitmap(&info, pixels, pFrameRGB);
i = 1;
}
}
av_free_packet(&packet);
}
AndroidBitmap_unlockPixels(env, bitmap);
}
int seek_frame(int tsms) {
int64_t frame;
frame = av_rescale(tsms, pFormatCtx->streams[videoStream]->time_base.den,
pFormatCtx->streams[videoStream]->time_base.num);
frame /= 1000;
if (avformat_seek_file(pFormatCtx, videoStream, 0, frame, frame,
AVSEEK_FLAG_FRAME) < 0) {
return 0;
}
avcodec_flush_buffers(pCodecCtx);
return 1;
}Log Trace
0): <6>AUO_TOUCH: ts_irqHandler: before disable_irq()
D/PrintK ( 57): <6>AUO_TOUCH: ts_irqWorkHandler: P1(313,750),P2(0,0)
D/PrintK ( 0): <6>AUO_TOUCH: ts_irqHandler: before disable_irq()
D/PrintK ( 57): <6>AUO_TOUCH: ts_irqWorkHandler: P1(0,0),P2(0,0)
E/FFMPEGSample( 2882): Checked on the bitmap*************************************************
E/FFMPEGSample( 2882): Grabbed the pixels*******************************************************
E/FFMPEGSample( 2882): packet pts 0
F/PrintK ( 2882): <2>Exception!!! bs.ffmpegsample: unhandled page fault (11) at 0x0000000c, code 0x017
F/PrintK ( 2882): <2>Exception!!! bs.ffmpegsample: unhandled page fault (11) at 0x0000000c, code 0x017
I/DEBUG ( 86): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
F/DEBUG ( 86): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
I/DEBUG ( 86): Build fingerprint: 'dell/streak/streak/8x50:2.2.2/FRG83G/eng.cmbuild.20110317.163900:user/release-keys'
I/DEBUG ( 86): Exception!!! pid: 2882, tid: 2882 >>> com.churnlabs.ffmpegsample <<<
F/DEBUG ( 86): Exception!!! pid: 2882, tid: 2882 >>> com.churnlabs.ffmpegsample <<<
I/DEBUG ( 86): signal 11 (SIGSEGV), fault addr 0000000c
F/DEBUG ( 86): signal 11 (SIGSEGV), fault addr 0000000c
I/DEBUG ( 86): r0 00000070 r1 00000000 r2 0024fca8 r3 afd42328
F/DEBUG ( 86): r0 00000070 r1 00000000 r2 0024fca8 r3 afd42328
I/DEBUG ( 86): r4 00000000 r5 00000000 r6 0000062c r7 0000a000
F/DEBUG ( 86): r4 00000000 r5 00000000 r6 0000062c r7 0000a000
I/DEBUG ( 86): r8 be9794f0 r9 428ab9d8 10 00000003 fp be979830
F/DEBUG ( 86): r8 be9794f0 r9 428ab9d8 10 00000003 fp be979830
I/DEBUG ( 86): ip ffffff90 sp be979448 lr afd0c633 pc afd0c320 cpsr 80000030
F/DEBUG ( 86): ip ffffff90 sp be979448 lr afd0c633 pc afd0c320 cpsr 80000030
I/DEBUG ( 86): d0 6472656767756265 d1 0000000000000000
I/DEBUG ( 86): d2 0000000000000000 d3 0000000044480000
I/DEBUG ( 86): d4 8000000000000000 d5 000000003f800000
I/DEBUG ( 86): d6 0000000000000000 d7 4448000043f00000
I/DEBUG ( 86): d8 0000000000000000 d9 0000000000000000
I/DEBUG ( 86): d10 0000000000000000 d11 0000000000000000
I/DEBUG ( 86): d12 0000000000000000 d13 0000000000000000
I/DEBUG ( 86): d14 0000000000000000 d15 0000000000000000
I/DEBUG ( 86): d16 0000000000000000 d17 0000000000000000
I/DEBUG ( 86): d18 0000000000000000 d19 0000000000000000
I/DEBUG ( 86): d20 3ff0000000000000 d21 8000000000000000
I/DEBUG ( 86): d22 0000000000000000 d23 0000000500010004
I/DEBUG ( 86): d24 0101010101010101 d25 0000000000000000
I/DEBUG ( 86): d26 0000000000000000 d27 0000000000000000
I/DEBUG ( 86): d28 0000000000000000 d29 3ff0000000000000
I/DEBUG ( 86): d30 0000000000000000 d31 3ff0000000000000
I/DEBUG ( 86): scr 80000012
I/DEBUG ( 86):
I/DEBUG ( 86): #00 pc 0000c320 /system/lib/libc.so
F/DEBUG ( 86): #00 pc 0000c320 /system/lib/libc.so
I/DEBUG ( 86): #01 pc 0000c62e /system/lib/libc.so
F/DEBUG ( 86): #01 pc 0000c62e /system/lib/libc.so
I/DEBUG ( 86): #02 pc 0000cd3e /system/lib/libc.so
F/DEBUG ( 86): #02 pc 0000cd3e /system/lib/libc.so
I/DEBUG ( 86): #03 pc 0002d2c4 /system/lib/libskia.so
F/DEBUG ( 86): #03 pc 0002d2c4 /system/lib/libskia.so
I/DEBUG ( 86): #04 pc 000693ec /system/lib/libskia.so
F/DEBUG ( 86): #04 pc 000693ec /system/lib/libskia.so
I/DEBUG ( 86): #05 pc 00064d70 /system/lib/libskia.so
F/DEBUG ( 86): #05 pc 00064d70 /system/lib/libskia.so
I/DEBUG ( 86): #06 pc 0004dea8 /system/lib/libandroid_runtime.so
F/DEBUG ( 86): #06 pc 0004dea8 /system/lib/libandroid_runtime.so
I/DEBUG ( 86): #07 pc 00016df4 /system/lib/libdvm.so
F/DEBUG ( 86): #07 pc 00016df4 /system/lib/libdvm.so
I/DEBUG ( 86): #08 pc 00042904 /system/lib/libdvm.so
F/DEBUG ( 86): #08 pc 00042904 /system/lib/libdvm.so
I/DEBUG ( 86): #09 pc 0001bd58 /system/lib/libdvm.so
F/DEBUG ( 86): #09 pc 0001bd58 /system/lib/libdvm.so
I/DEBUG ( 86): #10 pc 00022550 /system/lib/libdvm.so
F/DEBUG ( 86): #10 pc 00022550 /system/lib/libdvm.so
I/DEBUG ( 86): #11 pc 000213f0 /system/lib/libdvm.so
F/DEBUG ( 86): #11 pc 000213f0 /system/lib/libdvm.so
I/DEBUG ( 86): #12 pc 00058c4a /system/lib/libdvm.so
F/DEBUG ( 86): #12 pc 00058c4a /system/lib/libdvm.so
I/DEBUG ( 86): #13 pc 00060e72 /system/lib/libdvm.so
F/DEBUG ( 86): #13 pc 00060e72 /system/lib/libdvm.so
I/DEBUG ( 86): #14 pc 0001bd58 /system/lib/libdvm.so
F/DEBUG ( 86): #14 pc 0001bd58 /system/lib/libdvm.so
I/DEBUG ( 86): #15 pc 00022550 /system/lib/libdvm.so
F/DEBUG ( 86): #15 pc 00022550 /system/lib/libdvm.so
I/DEBUG ( 86): #16 pc 000213f0 /system/lib/libdvm.so
F/DEBUG ( 86): #16 pc 000213f0 /system/lib/libdvm.so
I/DEBUG ( 86): #17 pc 00058a90 /system/lib/libdvm.so
F/DEBUG ( 86): #17 pc 00058a90 /system/lib/libdvm.so
I/DEBUG ( 86): #18 pc 0004525e /system/lib/libdvm.so
F/DEBUG ( 86): #18 pc 0004525e /system/lib/libdvm.so
I/DEBUG ( 86): #19 pc 0002e574 /system/lib/libandroid_runtime.so
F/DEBUG ( 86): #19 pc 0002e574 /system/lib/libandroid_runtime.so
I/DEBUG ( 86): #20 pc 0002f5f6 /system/lib/libandroid_runtime.so
F/DEBUG ( 86): #20 pc 0002f5f6 /system/lib/libandroid_runtime.so
I/DEBUG ( 86): #21 pc 00008ca8 /system/bin/app_process
F/DEBUG ( 86): #21 pc 00008ca8 /system/bin/app_process
I/DEBUG ( 86): #22 pc 0000d3d0 /system/lib/libc.so
F/DEBUG ( 86): #22 pc 0000d3d0 /system/lib/libc.so
I/DEBUG ( 86):
I/DEBUG ( 86): code around pc:
I/DEBUG ( 86): afd0c300 19d94f56 42ba690f 80a4f0c0 94001814
I/DEBUG ( 86): afd0c310 f08042a2 68d1809f 42916994 6895d00e
I/DEBUG ( 86): afd0c320 429668ee 8096f040 4296688e 8092f040
I/DEBUG ( 86): afd0c330 bf2442bd 608d60e9 e08bd21b b1116951
I/DEBUG ( 86): afd0c340 0514f102 6911e007 f102b191 e0020510
I/DEBUG ( 86):
I/DEBUG ( 86): code around lr:
I/DEBUG ( 86): afd0c610 60f11008 f8c1608e 4e31c00c f10319a1
I/DEBUG ( 86): afd0c620 608a0608 e04b614d b1b2684a f7ff4628
I/DEBUG ( 86): afd0c630 e00ffe23 0f41f115 f04fbf88 d80c35ff
I/DEBUG ( 86): afd0c640 350b4927 0507f025 68431860 4628b12b
I/DEBUG ( 86): afd0c650 fc1cf7ff 28004606 4e21d132 689119a2
I/DEBUG ( 86):
I/DEBUG ( 86): stack:
I/DEBUG ( 86): be979408 000001e0
I/DEBUG ( 86): be97940c be979494 [stack]
I/DEBUG ( 86): be979410 be979438 [stack]
I/DEBUG ( 86): be979414 be979478 [stack]
I/DEBUG ( 86): be979418 0012f484 [heap]
I/DEBUG ( 86): be97941c be979428 [stack]
I/DEBUG ( 86): be979420 00000000
I/DEBUG ( 86): be979424 ab163cec /system/lib/libskia.so
I/DEBUG ( 86): be979428 3f800000
I/DEBUG ( 86): be97942c 80000000 /system/lib/libicudata.so
I/DEBUG ( 86): be979430 00000000
I/DEBUG ( 86): be979434 80000000 /system/lib/libicudata.so
I/DEBUG ( 86): be979438 3f800000
I/DEBUG ( 86): be97943c 00000000
I/DEBUG ( 86): be979440 df002777
I/DEBUG ( 86): be979444 e3a070ad
I/DEBUG ( 86): #00 be979448 0024fd18 [heap]
I/DEBUG ( 86): be97944c afd4372c /system/lib/libc.so
I/DEBUG ( 86): be979450 000000c5
I/DEBUG ( 86): be979454 afd42328 /system/lib/libc.so
I/DEBUG ( 86): be979458 00000070
I/DEBUG ( 86): be97945c 0000062c
I/DEBUG ( 86): be979460 00000003
I/DEBUG ( 86): be979464 afd0c633 /system/lib/libc.so
I/DEBUG ( 86): #01 be979468 be9794c8 [stack]
I/DEBUG ( 86): be97946c 00000000
I/DEBUG ( 86): be979470 002576bc [heap]
I/DEBUG ( 86): be979474 ab163d2c /system/lib/libskia.so
I/DEBUG ( 86): be979478 00000000
I/DEBUG ( 86): be97947c 00000000
I/DEBUG ( 86): be979480 44480000 /system/framework/framework-res.apk
I/DEBUG ( 86): be979484 00000068
I/DEBUG ( 86): be979488 00000002
I/DEBUG ( 86): be97948c 00000068
I/DEBUG ( 86): be979490 00000003
I/DEBUG ( 86): be979494 afd0cd41 /system/lib/libc.so
E/Parcel ( 841): Reading a NULL string not supported here.Can any plz suggest me where I'm doing wrong.