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SWFUpload Process
6 septembre 2011, par
Mis à jour : Septembre 2011
Langue : français
Type : Texte
Autres articles (63)
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MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, 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 (...) -
MediaSPIP 0.1 Beta version
25 avril 2011, parMediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
The zip file provided here only contains the sources of MediaSPIP in its standalone version.
To get a working installation, you must manually install all-software dependencies on the server.
If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...) -
Amélioration de la version de base
13 septembre 2013Jolie sélection multiple
Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)
Sur d’autres sites (9972)
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flv reencode to mp4 for iphone/ipod via ffmpeg and x264 (quality issue)
3 octobre 2011, par zeroasteriskThere are a lot of questions on this topic, and I've read most of them and most of the google search results I could come up with.
When I use FFMPEG to convert a FLV to a iphone3 compatble MP4 file, it just doesn't preserver enough of the quality. Yes, I've worked the hell out of
-sameqand-band-btsettings, text just isn't readable.Next I tried to split the video out and process it directly, using these instructions :
https://sites.google.com/site/linuxencoding/x264-encoding-guideThe problem is myplayer (via ffmpeg) was not able to determine the duration of the FLV (even though the metadata was set).
(I assume) Because of that unknown duration, when I create the MP4 file, the resulting x264 file plays through super-fast while the audio plays at the normal rate.
user@server:/tmp# mplayer -nosound -benchmark -sws 9 -vf dsize=640:480:0,scale=0:0,expand=640:480 -vo yuv4mpeg:file=>(x264 --demuxer y4m --crf 0 --preset slow --threads auto --output output.264 - 2>x264.log) 'input.flv'
MPlayer 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing input.flv.
libavformat file format detected.
[flv @ 0x1202460]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: video (vp6f), -vid 0
[lavf] stream 1: audio (nellymoser), -aid 0
VIDEO: [VP6F] 1680x992 0bpp 1000.000 fps 33.4 kbps ( 4.1 kbyte/s)
Clip info:
audiocodecid: 6
audiodatarate: 86
audiosamplerate: 44100
audiosamplesize: 16
audiosize: 6097005
canSeekToEnd: true
datasize: 8609138
duration: 567
framerate: 2
hasAudio: true
hasCuePoints: false
hasKeyframes: true
hasMetadata: true
hasVideo: true
height: 992
lasttimestamp: 567
metadatacreator: flvtool++ (Facebook, Motion project, dweatherford)
stereo: false
totalframes: 1043
videocodecid: 4
videodatarate: 33
videosize: 2316256
width: 1680
Using (default) progressive frame mode.Opening video filter: [expand w=640 h=480]
Expand: 640 x 480, -1 ; -1, osd: 0, aspect: 0.000000, round: 1
Opening video filter: [scale w=0 h=0]
Opening video filter: [dsize=640:480:0]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffvp6f] vfm: ffmpeg (FFmpeg VP6 Flash)
==========================================================================
Audio: no sound
Starting playback...
Movie-Aspect is undefined - no prescaling applied.
[swscaler @ 0x7f0c738b9620]Lanczos scaler, from yuv420p to yuv420p using MMX2
VO: [yuv4mpeg] 640x480 => 641x480 Planar YV12I have also tried specifying FPS, but no change in results
user@server:/tmp# mplayer -nosound -fps 25-benchmark -sws 9 -vf dsize=640:480:0,scale=0:0,expand=640:480 -vo yuv4mpeg:file=>(x264 --demuxer y4m --fps 25 --crf 0 --preset slow --threads auto --output output.264 - 2>x264.log) 'input.flv'Can someone tell me how to either :
- fix my split A/V processing/timing/duration issues ?
- improve the
quality of the FFMPEG conversion of FLV to iphone3 compatible
format ?
-
flv reencode to mp4 for iphone/ipod via ffmpeg and x264 (quality issue)
3 octobre 2011, par zeroasteriskThere are a lot of questions on this topic, and I've read most of them and most of the google search results I could come up with.
When I use FFMPEG to convert a FLV to a iphone3 compatble MP4 file, it just doesn't preserver enough of the quality. Yes, I've worked the hell out of
-sameqand-band-btsettings, text just isn't readable.Next I tried to split the video out and process it directly, using these instructions :
https://sites.google.com/site/linuxencoding/x264-encoding-guideThe problem is myplayer (via ffmpeg) was not able to determine the duration of the FLV (even though the metadata was set).
(I assume) Because of that unknown duration, when I create the MP4 file, the resulting x264 file plays through super-fast while the audio plays at the normal rate.
user@server:/tmp# mplayer -nosound -benchmark -sws 9 -vf dsize=640:480:0,scale=0:0,expand=640:480 -vo yuv4mpeg:file=>(x264 --demuxer y4m --crf 0 --preset slow --threads auto --output output.264 - 2>x264.log) 'input.flv'
MPlayer 1.0rc4-4.4.5 (C) 2000-2010 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing input.flv.
libavformat file format detected.
[flv @ 0x1202460]Estimating duration from bitrate, this may be inaccurate
[lavf] stream 0: video (vp6f), -vid 0
[lavf] stream 1: audio (nellymoser), -aid 0
VIDEO: [VP6F] 1680x992 0bpp 1000.000 fps 33.4 kbps ( 4.1 kbyte/s)
Clip info:
audiocodecid: 6
audiodatarate: 86
audiosamplerate: 44100
audiosamplesize: 16
audiosize: 6097005
canSeekToEnd: true
datasize: 8609138
duration: 567
framerate: 2
hasAudio: true
hasCuePoints: false
hasKeyframes: true
hasMetadata: true
hasVideo: true
height: 992
lasttimestamp: 567
metadatacreator: flvtool++ (Facebook, Motion project, dweatherford)
stereo: false
totalframes: 1043
videocodecid: 4
videodatarate: 33
videosize: 2316256
width: 1680
Using (default) progressive frame mode.Opening video filter: [expand w=640 h=480]
Expand: 640 x 480, -1 ; -1, osd: 0, aspect: 0.000000, round: 1
Opening video filter: [scale w=0 h=0]
Opening video filter: [dsize=640:480:0]
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffvp6f] vfm: ffmpeg (FFmpeg VP6 Flash)
==========================================================================
Audio: no sound
Starting playback...
Movie-Aspect is undefined - no prescaling applied.
[swscaler @ 0x7f0c738b9620]Lanczos scaler, from yuv420p to yuv420p using MMX2
VO: [yuv4mpeg] 640x480 => 641x480 Planar YV12I have also tried specifying FPS, but no change in results
user@server:/tmp# mplayer -nosound -fps 25-benchmark -sws 9 -vf dsize=640:480:0,scale=0:0,expand=640:480 -vo yuv4mpeg:file=>(x264 --demuxer y4m --fps 25 --crf 0 --preset slow --threads auto --output output.264 - 2>x264.log) 'input.flv'Can someone tell me how to either :
- fix my split A/V processing/timing/duration issues ?
- improve the
quality of the FFMPEG conversion of FLV to iphone3 compatible
format ?
-
iPhone camera shooting video using the AVCaptureSession and using ffmpeg CMSampleBufferRef a change in h.264 format is the issue. please advice
4 janvier 2012, par isaiahMy goal is h.264/AAC , mpeg2-ts streaming to server from iphone device.
Current my source is FFmpeg+libx264 compile success. I Know gnu License. I want the demo program.
I'm want to know that
1.CMSampleBufferRef to AVPicture data is success ?
avpicture_fill((AVPicture*)pFrame, rawPixelBase, PIX_FMT_RGB32, width, height);
pFrame linesize and data is not null but pst -9233123123 . outpic also .
Because of this I have to guess 'non-strictly-monotonic PTS' message2.This log is repeat.
encoding frame (size= 0)
encoding frame = "" , 'avcodec_encode_video' return 0 is success but always 0 .I don't know what to do...
2011-06-01 15:15:14.199 AVCam[1993:7303] pFrame = avcodec_alloc_frame();
2011-06-01 15:15:14.207 AVCam[1993:7303] avpicture_fill = 1228800
Video encoding
2011-0601 15:5:14.215 AVCam[1993:7303] codec = 5841844
[libx264 @ 0x1441e00] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x1441e00] profile Constrained Baseline, level 2.0[libx264 @ 0x1441e00] non-strictly-monotonic PTS
encoding frame (size= 0)
encoding frame
[libx264 @ 0x1441e00] final ratefactor: 26.743.I have to guess 'non-strictly-monotonic PTS' message is the cause of all problems.
what is this 'non-strictly-monotonic PTS' .this is source
(void) captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)sampleBuffer
fromConnection:(AVCaptureConnection *)connection
{
if( !CMSampleBufferDataIsReady(sampleBuffer) )
{
NSLog( @"sample buffer is not ready. Skipping sample" );
return;
}
if( [isRecordingNow isEqualToString:@"YES"] )
{
lastSampleTime = CMSampleBufferGetPresentationTimeStamp(sampleBuffer);
if( videoWriter.status != AVAssetWriterStatusWriting )
{
[videoWriter startWriting];
[videoWriter startSessionAtSourceTime:lastSampleTime];
}
if( captureOutput == videooutput )
{
[self newVideoSample:sampleBuffer];
CVImageBufferRef pixelBuffer = CMSampleBufferGetImageBuffer(sampleBuffer);
CVPixelBufferLockBaseAddress(pixelBuffer, 0);
// access the data
int width = CVPixelBufferGetWidth(pixelBuffer);
int height = CVPixelBufferGetHeight(pixelBuffer);
unsigned char *rawPixelBase = (unsigned char *)CVPixelBufferGetBaseAddress(pixelBuffer);
AVFrame *pFrame;
pFrame = avcodec_alloc_frame();
pFrame->quality = 0;
NSLog(@"pFrame = avcodec_alloc_frame(); ");
// int bytesPerRow = CVPixelBufferGetBytesPerRowOfPlane(pixelBuffer, 0);
// int bytesSize = height * bytesPerRow ;
// unsigned char *pixel = (unsigned char*)malloc(bytesSize);
// unsigned char *rowBase = CVPixelBufferGetBaseAddressOfPlane(pixelBuffer, 0);
// memcpy (pixel, rowBase, bytesSize);
int avpicture_fillNum = avpicture_fill((AVPicture*)pFrame, rawPixelBase, PIX_FMT_RGB32, width, height);//PIX_FMT_RGB32//PIX_FMT_RGB8
//NSLog(@"rawPixelBase = %i , rawPixelBase -s = %s",rawPixelBase, rawPixelBase);
NSLog(@"avpicture_fill = %i",avpicture_fillNum);
//NSLog(@"width = %i,height = %i",width, height);
// Do something with the raw pixels here
CVPixelBufferUnlockBaseAddress(pixelBuffer, 0);
//avcodec_init();
//avdevice_register_all();
av_register_all();
AVCodec *codec;
AVCodecContext *c= NULL;
int out_size, size, outbuf_size;
//FILE *f;
uint8_t *outbuf;
printf("Video encoding\n");
/* find the mpeg video encoder */
codec =avcodec_find_encoder(CODEC_ID_H264);//avcodec_find_encoder_by_name("libx264"); //avcodec_find_encoder(CODEC_ID_H264);//CODEC_ID_H264);
NSLog(@"codec = %i",codec);
if (!codec) {
fprintf(stderr, "codec not found\n");
exit(1);
}
c= avcodec_alloc_context();
/* put sample parameters */
c->bit_rate = 400000;
c->bit_rate_tolerance = 10;
c->me_method = 2;
/* resolution must be a multiple of two */
c->width = 352;//width;//352;
c->height = 288;//height;//288;
/* frames per second */
c->time_base= (AVRational){1,25};
c->gop_size = 10;//25; /* emit one intra frame every ten frames */
//c->max_b_frames=1;
c->pix_fmt = PIX_FMT_YUV420P;
c ->me_range = 16;
c ->max_qdiff = 4;
c ->qmin = 10;
c ->qmax = 51;
c ->qcompress = 0.6f;
/* open it */
if (avcodec_open(c, codec) < 0) {
fprintf(stderr, "could not open codec\n");
exit(1);
}
/* alloc image and output buffer */
outbuf_size = 100000;
outbuf = malloc(outbuf_size);
size = c->width * c->height;
AVFrame* outpic = avcodec_alloc_frame();
int nbytes = avpicture_get_size(PIX_FMT_YUV420P, c->width, c->height);
//create buffer for the output image
uint8_t* outbuffer = (uint8_t*)av_malloc(nbytes);
#pragma mark -
fflush(stdout);
<pre>// int numBytes = avpicture_get_size(PIX_FMT_YUV420P, c->width, c->height);
// uint8_t *buffer = (uint8_t *)av_malloc(numBytes*sizeof(uint8_t));
//
// //UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"10%d", i]];
// CGImageRef newCgImage = [self imageFromSampleBuffer:sampleBuffer];//[image CGImage];
//
// CGDataProviderRef dataProvider = CGImageGetDataProvider(newCgImage);
// CFDataRef bitmapData = CGDataProviderCopyData(dataProvider);
// buffer = (uint8_t *)CFDataGetBytePtr(bitmapData);
//
// avpicture_fill((AVPicture*)pFrame, buffer, PIX_FMT_RGB8, c->width, c->height);
avpicture_fill((AVPicture*)outpic, outbuffer, PIX_FMT_YUV420P, c->width, c->height);
struct SwsContext* fooContext = sws_getContext(c->width, c->height,
PIX_FMT_RGB8,
c->width, c->height,
PIX_FMT_YUV420P,
SWS_FAST_BILINEAR, NULL, NULL, NULL);
//perform the conversion
sws_scale(fooContext, pFrame->data, pFrame->linesize, 0, c->height, outpic->data, outpic->linesize);
// Here is where I try to convert to YUV
/* encode the image */
out_size = avcodec_encode_video(c, outbuf, outbuf_size, outpic);
printf("encoding frame (size=%5d)\n", out_size);
printf("encoding frame %s\n", outbuf);
//fwrite(outbuf, 1, out_size, f);
// free(buffer);
// buffer = NULL;
/* add sequence end code to have a real mpeg file */
// outbuf[0] = 0x00;
// outbuf[1] = 0x00;
// outbuf[2] = 0x01;
// outbuf[3] = 0xb7;
//fwrite(outbuf, 1, 4, f);
//fclose(f);
free(outbuf);
avcodec_close(c);
av_free(c);
av_free(pFrame);
printf("\n");
</pre>
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