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Autres articles (45)
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La sauvegarde automatique de canaux SPIP
1er avril 2010, parDans le cadre de la mise en place d’une plateforme ouverte, il est important pour les hébergeurs de pouvoir disposer de sauvegardes assez régulières pour parer à tout problème éventuel.
Pour réaliser cette tâche on se base sur deux plugins SPIP : Saveauto qui permet une sauvegarde régulière de la base de donnée sous la forme d’un dump mysql (utilisable dans phpmyadmin) mes_fichiers_2 qui permet de réaliser une archive au format zip des données importantes du site (les documents, les éléments (...) -
Les autorisations surchargées par les plugins
27 avril 2010, parMediaspip core
autoriser_auteur_modifier() afin que les visiteurs soient capables de modifier leurs informations sur la page d’auteurs -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir
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Android Screen mirroring via rtsp server
7 juillet 2017, par Anıl Mert ArI was trying to mirror my android phone’s screen to my PC. I actually did that thanks to
ffplayandadb. But my question is how I can send it to anrtspserver. Do I need any additional stuff besides them ?What I can do :
adb exec-out screenrecord --output-format=h264 - | ffplay -I completely didn’t understand how to send this output to an rtsp server and I don’t know if there is additional thing rather than rtsp I will be so appreciated if you help me. Thanks.
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FFmpeg - Concatenating videos with different resolutions
7 août 2017, par JillI currently have an android app where the videos get combined using ffmpeg’s concat. That works fine. However, when I add text (using drawtext) to one of the videos, after combining the videos again, the combined video gets distorted. The video with the drawtext shows up fine, but then the videos without text switches orientation.
I think the problem roots from the fact that a vertical video on my android phone has the resolution of 1920x1080, however if I use that for the scale when executing drawtext, it becomes horizontal.
I think an example might help explain this better. Let’s say I have 2 vertically recorded videos, and I combine them with concat. The combined video shows up fine. Then if I add text to the 1st video using drawtext, the combined video will then show the first video (with text) at normal orientation (vertical). However, when it transitions to the next video, it first stalls for a couple seconds and then the 2nd video is shown at a horizontal orientation.
Also, I tried this also with having the aspect ratio as 1:1 so it wouldn’t matter, but the second video’s orientation still changed counter clockwise.
Thanks for the help, and happy to add more clarification if needed.
This is for adding the text :
ffmpeg -i input.mp4 -vf drawbox=y=ih-200:color=black@0.5:width=iw:height=200:t=max
,drawtext=fontfile=RobotoRegular.ttf:text='Text':x=(w-text_w)/2:y=(h-text_h)-100:fontsize=70:fontcolor=white
-c:v libx264 -b:v 17000k -r 30 -preset ultrafast -y output.mp4Output :
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --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/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Android/data/com.me.app/files/65/VID_20170802_111518.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2017-08-02 18:15:20
com.android.version: 7.0
Duration: 00:00:00.93, start: 0.000000, bitrate: 16415 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1920x1080, 16408 kb/s, SAR 1:1 DAR 16:9, 28.94 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 90
creation_time : 2017-08-02 18:15:20
handler_name : VideoHandle
Side data:
displaymatrix: rotation of -90.00 degrees
[libx264 @ 0xeab7ec00] using SAR=1/1
[libx264 @ 0xeab7ec00] using cpu capabilities: none!
[libx264 @ 0xeab7ec00] profile Constrained Baseline, level 4.1
[libx264 @ 0xeab7ec00] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=abr mbtree=0 bitrate=17000 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/65/temp.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
com.android.version: 7.0
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 (libx264) ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=-1--1, 17000 kb/s, 30 fps, 15360 tbn, 30 tbc (default)
Metadata:
handler_name : VideoHandle
creation_time : 2017-08-02 18:15:20
encoder : Lavc57.24.102 libx264
Side data:
unknown side data type 10 (24 bytes)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
frame= 6 fps=0.0 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 10 fps=8.8 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A dup=1 drop=0 speed= 0x
frame= 14 fps=8.4 q=15.0 size= 155kB time=00:00:00.03 bitrate=38067.5kbits/s dup=1 drop=0 speed=0.0201x
frame= 18 fps=8.0 q=22.0 size= 744kB time=00:00:00.16 bitrate=36592.5kbffmpeg -f concat -safe 0 -i input.mp4 -c copy -y output.mp4Output :
ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 4.8 (GCC)
configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --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/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
libavutil 55. 17.103 / 55. 17.103
libavcodec 57. 24.102 / 57. 24.102
libavformat 57. 25.100 / 57. 25.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 31.100 / 6. 31.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
Input #0, concat, from '/storage/emulated/0/Android/data/com.me.app/files/64/TXT_20170802_110325.txt':
Duration: N/A, start: 0.000000, bitrate: 23403 kb/s
Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc
Metadata:
handler_name : VideoHandler
Output #0, mp4, to '/storage/emulated/0/Android/data/com.me.app/files/64/VID_20170802_110325concat.mp4':
Metadata:
encoder : Lavf57.25.100
Stream #0:0(eng): Video: h264 ([33][0][0][0] / 0x0021), yuv420p, 1080x1920 [SAR 1:1 DAR 9:16], q=2-31, 23403 kb/s, 30 fps, 30 tbr, 15360 tbn, 15360 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[mov,mp4,m4a,3gp,3g2,mj2 @ 0xe762a600] Auto-inserting h264_mp4toannexb bitstream filter
frame= 64 fps=0.0 q=-1.0 Lsize= 5218kB time=00:00:12.30 bitrate=3474.5kbits/s speed= 122x
video:5217kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.025721% -
getting frame using ffmpeg in android
5 août 2014, par user2098010I wanna get frames from .mp4(recored by phone camera) using ffmpeg in android.
did ! comfile and ndk-build
my questions are-
for getting frames from .mp4, what should i do ?
encoding ? decoding ? -
encoded mp4 video file, could not play file mp4 on mediaplayer.
help me plz....
enter code here
#include
#include
#include
#include <android></android>log.h>
#include <libavcodec></libavcodec>avcodec.h>
#include <libavformat></libavformat>avformat.h>
#include <libswscale></libswscale>swscale.h>
#include <libavutil></libavutil>opt.h>
#include <libavutil></libavutil>channel_layout.h>
#include <libavutil></libavutil>common.h>
#include <libavutil></libavutil>imgutils.h>
#include <libavutil></libavutil>mathematics.h>
#include <libavutil></libavutil>samplefmt.h>
#include "player.h"
void video_encode_example(const char *filename, int codec_id)
{
AVCodec *codec;
AVCodecContext *c= NULL;
int i, ret, x, y, got_output;
FILE *f;
AVFrame *frame;
AVPacket pkt;
uint8_t endcode[] = { 0, 0, 1, 0xb7 };
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "%s",filename);
/* find the mpeg1 video encoder */
codec = avcodec_find_encoder(CODEC_ID_H263);
if (!codec) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Codec not found");
exit(1);
}
c = avcodec_alloc_context3(codec);
if (!c) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Could not allocate video codec context");
exit(1);
}
/* put sample parameters */
c->bit_rate = 400000;
/* resolution must be a multiple of two */
c->width = 352;
c->height = 288;
/* frames per second */
c->time_base= (AVRational){1,25};
c->gop_size = 10; /* emit one intra frame every ten frames */
c->max_bframes=1;
c->pix_fmt = AV_PIX_FMT_YUV420P;
// if(codec == AV_CODEC_ID_H264)
// av_opt_set(c->priv_data, "preset", "slow", 0);
/* open it */
if (avcodec_open2(c, codec, NULL) < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Could not open codec");
exit(1);
}
f = fopen(filename, "wb");
if (f == NULL) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Could not open");
exit(1);
}
frame = avcodec_alloc_frame();
if (!frame) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Could not allocate video frame");
exit(1);
}
frame->format = c->pix_fmt;
frame->width = c->width;
frame->height = c->height;
/* the image can be allocated by any means and av_image_alloc() is
* just the most convenient way if av_malloc() is to be used */
ret = av_image_alloc(frame->data, frame->linesize, c->width, c->height,
c->pix_fmt, 32);
if (ret < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Could not allocate raw picture buffer");
exit(1);
}
/* encode 1 second of video */
for(i=0;i<250;i++) {
av_init_packet(&pkt);
pkt.data = NULL; // packet data will be allocated by the encoder
pkt.size = 0;
fflush(stdout);
/* prepare a dummy image */
/* Y */
for(y=0;yheight;y++) {
for(x=0;xwidth;x++) {
frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3;
}
}
/* Cb and Cr */
for(y=0;yheight/2;y++) {
for(x=0;xwidth/2;x++) {
frame->data[1][y * frame->linesize[1] + x] = 128 + y + i * 2;
frame->data[2][y * frame->linesize[2] + x] = 64 + x + i * 5;
}
}
frame->pts = i;
/* encode the image */
ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
if (ret < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Error encoding frame");
exit(1);
}
if (got_output) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "encode the image Write frame pktsize %d", pkt.size);
fwrite(pkt.data, 1, pkt.size, f);
av_free_packet(&pkt);
}
}
/* get the delayed frames */
for (got_output = 1; got_output; i++) {
fflush(stdout);
ret = avcodec_encode_video2(c, &pkt, NULL, &got_output);
if (ret < 0) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "Error encoding frame");
fprintf(stderr, "Error encoding frame\n");
exit(1);
}
if (got_output) {
__android_log_print(ANDROID_LOG_DEBUG, "BASEBALL", "get the delayed frames Write frame pktsize %d", pkt.size);
fwrite(pkt.data, 1, pkt.size, f);
av_free_packet(&pkt);
}
}
/* add sequence end code to have a real mpeg file */
fwrite(endcode, 1, sizeof(endcode), f);
fclose(f);
avcodec_close(c);
av_free(c);
av_freep(&frame->data[0]);
avcodec_free_frame(&frame);
}
enter code here -
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