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Problèmes fréquents
10 mars 2010, parPHP et safe_mode activé
Une des principales sources de problèmes relève de la configuration de PHP et notamment de l’activation du safe_mode
La solution consiterait à soit désactiver le safe_mode soit placer le script dans un répertoire accessible par apache pour le site -
Emballe Médias : Mettre en ligne simplement des documents
29 octobre 2010, parLe plugin emballe médias a été développé principalement pour la distribution mediaSPIP mais est également utilisé dans d’autres projets proches comme géodiversité par exemple. Plugins nécessaires et compatibles
Pour fonctionner ce plugin nécessite que d’autres plugins soient installés : CFG Saisies SPIP Bonux Diogène swfupload jqueryui
D’autres plugins peuvent être utilisés en complément afin d’améliorer ses capacités : Ancres douces Légendes photo_infos spipmotion (...) -
Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
Sur d’autres sites (13417)
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AV_PIX_FMT_YUVJ422P to jpeg conversion
4 mars 2019, par user3743908i am able to convert image from AV_PIX_FMT_YUVJ422P to jpeg format (below Code) but the resultant image having green shade on complete bottom half plz suggest where i am doing wrong.
Following step i have taken-
Initially i have AV_PIX_FMT_UYVY422 image from camera, i have convert it in AV_PIX_FMT_YUVJ422P format and able to see this image on http://rawpixels.net/ the parameters shown by website is size 2448X2050, Bpp1= 8,Bpp2 = 8 and Bpp3 = 8,alignment 1, SubSampling H =2, and SubSampling V = 1, format : YUV422P
so input image is Correct AV_PIX_FMT_YUVJ422P format. & also able to see on "YUV image viewer Software" using YUV422 format. -
Now i am trying to convert it in jpeg format using below Code and attached is the resultant Image having green shade on complete bottom half.
AVFormatContext* pFormatCtx;
AVOutputFormat* fmt;
AVStream* video_st;
AVCodecContext* pCodecCtx;
AVCodec* pCodec;
uint8_t* picture_buf;
AVFrame* picture;
AVPacket pkt;
int y_size;
int size;
int got_picture=0;
int ret=0;
int main( int argc, char* argv[] )
{
FILE *in_file = NULL;
unsigned int in_width = 2448;
unsigned int in_height = 2050;
const char* out_file = "encoded_pic.jpg";
in_file = fopen("c:\\test_Planar.yuv","rb");
if(in_file == NULL) { printf("\n\tFile Opening error...!!"); exit(1); }
else printf("\n\tYUV File Open Sucessfully...!!\n\n");
av_register_all(); // Loads the whole database of available codecs and formats.
pFormatCtx = avformat_alloc_context();
fmt = NULL;
fmt = av_guess_format("mjpeg",NULL,NULL);
pFormatCtx->oformat = fmt;
//------Output URL-------------------------
if (avio_open(&pFormatCtx->pb,out_file, AVIO_FLAG_READ_WRITE) < 0)
{
printf("Couldn't open output file.");
return -1;
}
video_st = avformat_new_stream(pFormatCtx, 0);
if (video_st==NULL) return -1;
pCodecCtx = video_st->codec;
pCodecCtx->codec_id = fmt->video_codec;
pCodecCtx->codec_type = AVMEDIA_TYPE_VIDEO;
pCodecCtx->pix_fmt = AV_PIX_FMT_YUVJ422P;
//--------------------------MY SOURCE PIXEL FORMAT--------------
pCodecCtx->width = in_width;
pCodecCtx->height = in_height;
pCodecCtx->time_base.num = 1;
pCodecCtx->time_base.den = 1;//25;
//Output some information
av_dump_format(pFormatCtx, 0, out_file, 1);
// Determine if desired video encoder is installed
pCodec = avcodec_find_encoder(pCodecCtx->codec_id);
if (!pCodec)
{
printf("Codec not found.");
return -1;
}
printf("\nCodec Identified done\n");
if (avcodec_open2(pCodecCtx, pCodec,NULL) < 0){
printf("Could not open codec.\n");
return -1;
}
picture = av_frame_alloc();
size = avpicture_get_size(pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);
picture_buf = (uint8_t *)av_malloc(size);
if (!picture_buf) return -1;
avpicture_fill((AVPicture *)picture, picture_buf, pCodecCtx->pix_fmt, pCodecCtx->width, pCodecCtx->height);
printf("\t\nWrite Header..");
avformat_write_header(pFormatCtx,NULL);
y_size = pCodecCtx->width * pCodecCtx->height;
av_new_packet(&pkt,y_size*3);
//Read YUV
if (fread(picture_buf, 1, y_size*3/2, in_file) <=0)
{
printf("Could not read input file.");
return -1;
}
//--------------------------------------------input image format UYVY
picture->data[0] = picture_buf; // Y
picture->data[1] = picture_buf+ y_size; // U
picture->data[2] = picture_buf+ y_size*5/4; // V
//-----------------------------------------------
printf("\t\n Encode the image..\n");
ret = avcodec_encode_video2(pCodecCtx, &pkt,picture, &got_picture);
if(ret < 0)
{
printf("Encode Error.\n");
return -1;
}
if (got_picture==1)
{
pkt.stream_index = video_st->index;
ret = av_write_frame(pFormatCtx, &pkt);
}
av_free_packet(&pkt);
//Write Trailer
av_write_trailer(pFormatCtx);
printf("Encode Successful.\n");
if (video_st)
{
avcodec_close(video_st->codec);
av_free(picture);
av_free(picture_buf);
}
avio_close(pFormatCtx->pb);
avformat_free_context(pFormatCtx);
fclose(in_file);
printf("\n\tYUV File Close Sucessfully...!!");
}
Resultant output jpeg encoded image from yuvj422p image having green shade
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FFMPEG error when saving NDI stream to mp4
22 septembre 2020, par user1163234I am trying to record a NDI stream to a MP4 file(I want to stream the mp4 to rtmp endpoint after saving file). However I am getting this error when running this class. https://github.com/WalkerKnapp/devolay/blob/master/examples/src/main/java/com/walker/devolayexamples/recording/RecordingExample.java


Error :


Connecting to source: DESKTOP-GQNH46Q (Ari PC output)
[file @ 0x7fb4f2d48540] Setting default whitelist 'file,crypto'
x265 [info]: HEVC encoder version 0.0
x265 [info]: build info [Mac OS X][clang 8.1.0][64 bit] 8bit+10bit+12bit
x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
x265 [info]: Main profile, Level-3.1 (Main tier)
x265 [info]: Thread pool created using 8 threads
x265 [info]: Slices : 1
x265 [info]: frame threads / pool features : 1 / wpp(12 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
x265 [info]: ME / range / subpel / merge : hex / 57 / 2 / 3
x265 [info]: Keyframe min / max / scenecut / bias: 1 / 250 / 40 / 5.00
x265 [info]: Lookahead / bframes / badapt : 20 / 4 / 2
x265 [info]: b-pyramid / weightp / weightb : 1 / 1 / 0
x265 [info]: References / ref-limit cu / depth : 3 / off / on
x265 [info]: AQ: mode / str / qg-size / cu-tree : 2 / 1.0 / 32 / 1
x265 [info]: Rate Control / qCompress : CRF-28.0 / 0.60
x265 [info]: tools: rd=3 psy-rd=2.00 early-skip rskip signhide tmvp b-intra
x265 [info]: tools: strong-intra-smoothing lslices=4 deblock sao
[SWR @ 0x7fb4f8893000] Using fltp internally between filters
[mp4 @ 0x7fb4f3820200] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 135 >= 107
Failed to write video flush packet, skipping: Invalid argument
configurationVersion: 1
general_profile_space: 0
general_tier_flag: 0
general_profile_idc: 1
general_profile_compatibility_flags: 0x60000000
general_constraint_indicator_flags: 0x900000000000
general_level_idc: 93
min_spatial_segmentation_idc: 0
parallelismType: 0
chromaFormat: 1
bitDepthLumaMinus8: 0
bitDepthChromaMinus8: 0
avgFrameRate: 0
constantFrameRate: 0
numTemporalLayers: 1
temporalIdNested: 1
lengthSizeMinusOne: 3
numOfArrays: 4
array_completeness[0]: 0
NAL_unit_type[0]: 32
numNalus[0]: 1
nalUnitLength[0][0]: 24
array_completeness[1]: 0
NAL_unit_type[1]: 33
numNalus[1]: 1
nalUnitLength[1][0]: 41
array_completeness[2]: 0
NAL_unit_type[2]: 34
numNalus[2]: 1
nalUnitLength[2][0]: 7
array_completeness[3]: 0
NAL_unit_type[3]: 39
numNalus[3]: 1
nalUnitLength[3][0]: 2050
[AVIOContext @ 0x7fb4f2d48640] Statistics: 2 seeks, 4 writeouts
x265 [info]: frame I: 1, Avg QP:14.03 kb/s: 16.33 
x265 [info]: frame P: 36, Avg QP:21.67 kb/s: 0.04 
x265 [info]: frame B: 73, Avg QP:24.22 kb/s: 0.03 
x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
x265 [info]: consecutive B-frames: 28.9% 13.2% 18.4% 2.6% 36.8% 

encoded 110 frames in 15.13s (7.27 fps), 0.18 kb/s, Avg QP:23.29
[aac @ 0x7fb4f6aa6200] Qavg: 65536.000


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ffmpeg API : handle frame loss in hevc encoding
8 janvier 2024, par MarioEverything works fine until the introduction of frame->pts increment due to frame loss.


Below is the regular progression without frame->pts increments :




frame->pts=8 pkt->pts=512 pkt->dts=-512 pkt->flags=1

frame->pts=9 pkt->pts=2560 pkt->dts=0 pkt->flags=0

frame->pts=10 pkt->pts=1536 pkt->dts=512 pkt->flags=0

frame->pts=11 pkt->pts=1024 pkt->dts=1024 pkt->flags=0

frame->pts=12 pkt->pts=2048 pkt->dts=1536 pkt->flags=0

frame->pts=13 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=14 pkt->pts=3584 pkt->dts=2560 pkt->flags=0

frame->pts=15 pkt->pts=3072 pkt->dts=3072 pkt->flags=0

frame->pts=16 pkt->pts=4096 pkt->dts=3584 pkt->flags=0

frame->pts=17 pkt->pts=6656 pkt->dts=4096 pkt->flags=0

frame->pts=18 pkt->pts=5632 pkt->dts=4608 pkt->flags=0



When I introduce the frame->pts increment it happens :




frame->pts=15 pkt->pts=512 pkt->dts=-512 pkt->flags=1

frame->pts=17 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=19 pkt->pts=2560 pkt->dts=1536 pkt->flags=0

[mp4 @ 0x7eff842222c0] Application provided invalid, non monotonically increasing dts to muxer in stream 0 : 2048 >= 1536



So I wrote the following code as a "quick" solution (between av_packet_rescale_ts() and av_interleaved_write_frame()) :


av_packet_rescale_ts(pkt, c->time_base, st->time_base); 
 ...
 if (pkt->dts<=previous_dts) 
 { 
 if (pkt->pts<=previous_pts) 
 { 
 pkt->pts=previous_dts+1+pkt->pts-pkt->dts; 
 } 
 pkt->dts=previous_dts+1; 
 } 
 previous_dts=pkt->dts; 
 previous_pts=pkt->pts; 
 ...
 ret = av_interleaved_write_frame(fmt_ctx, pkt); 


Now I no longer have the error, but the values are :




frame->pts=15 pkt->pts=512 pkt->dts=-512 pkt->flags=1

changed frame->pts=15 pkt->pts=512 pkt->dts=1 pkt->flags=1

frame->pts=17 pkt->pts=4608 pkt->dts=2048 pkt->flags=0

frame->pts=19 pkt->pts=2560 pkt->dts=1536 pkt->flags=0

changed frame->pts=19 pkt->pts=3073 pkt->dts=2049 pkt->flags=0

frame->pts=21 pkt->pts=1536 pkt->dts=1536 pkt->flags=0

changed frame->pts=21 pkt->pts=2050 pkt->dts=2050 pkt->flags=0

frame->pts=23 pkt->pts=4096 pkt->dts=3584 pkt->flags=0

frame->pts=25 pkt->pts=8704 pkt->dts=6144 pkt->flags=0

frame->pts=27 pkt->pts=6656 pkt->dts=5632 pkt->flags=0

changed frame->pts=27 pkt->pts=7169 pkt->dts=6145 pkt->flags=0

frame->pts=29 pkt->pts=5632 pkt->dts=5632 pkt->flags=0

changed frame->pts=29 pkt->pts=6146 pkt->dts=6146 pkt->flags=0

frame->pts=31 pkt->pts=7680 pkt->dts=7168 pkt->flags=0

frame->pts=33 pkt->pts=12800 pkt->dts=10240 pkt->flags=0

frame->pts=35 pkt->pts=10752 pkt->dts=9728 pkt->flags=0

changed frame->pts=35 pkt->pts=11265 pkt->dts=10241 pkt->flags=0

frame->pts=37 pkt->pts=9728 pkt->dts=9728 pkt->flags=0

changed frame->pts=37 pkt->pts=10242 pkt->dts=10242 pkt->flags=0



What is the correct way to handle frame loss scenario ?
Is there a way to inform the encoder about frame loss ?


The encoder is "hevc_qsv" and the output format is mov (.mp4).


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