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• AV_PIX_FMT_YUVJ422P to jpeg conversion

  4 mars 2019, par user3743908

  i 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

  1. 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.

  2. 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

• FFMPEG error when saving NDI stream to mp4

  22 septembre 2020, par user1163234

  I 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


  


• ffmpeg API : handle frame loss in hevc encoding

  8 janvier 2024, par Mario

  Everything 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).