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• Warning in converting YUV color format to RGB in FFmpeg

  9 janvier 2015, par deepak

  I have YUV420P to RGB format conversion algorithm (given below), but this is giving
  following warning while compiling.. Also showing memory leaks in valgrind..

  warning : ‘SwsContext* sws_getContext(int, int, PixelFormat, int, int, PixelFormat, int, SwsFilter*, SwsFilter*, const double*)’ is deprecated (declared at /opt/ffmpeg.h264/include/libswscale/swscale.h:191)

  void YUV2RGB(const IplImage *yuvImg, IplImage *rgbImg) const
  
  {
  
    //code
  
    struct SwsContext *img_convert_ctx = sws_getContext(w, h, PIX_FMT_YUV420P,
  
                                                         w, h, PIX_FMT_BGR24,
  
                                                         SWS_BICUBIC,NULL, NULL, NULL);
  
    //code
  
  
  
  
  
  }

  Can anybody tell how to correct the memory leak and remove the warning

• FFMPEG : Fill/Change (part of) audio waveform color as per actual progress with respect to time progress

  13 août 2018, par Software Development Consultan

  I am trying to make command which is generating waveform from mp3 file and show on background image and play audio.
  Togethr with this, I want to change waveform color left to right (something like progressbar) as per overall video time elapses.

  I have created following command which shows progress bar using drawbox to fill box color as per current time position.

  ffmpeg -y -loop 1 -threads 0 -i sample_background.png -i input.mp3 -filter_complex "color=red@0.5:s=1280x100[Color] ;[0:v]drawbox=0:155:1280:100:gray@1:t=fill[baserect] ;[1:a]aformat=channel_layouts=mono,showwaves=s=1280x100:rate=7:mode=cline:scale=sqrt:colors=0xffffff[waveform] ; [baserect][waveform] overlay=0:155 [v1] ;[v1][Color] overlay=x=’if(gte(t,0), -W+(t)*64, NAN)’:y=155:format=yuv444[v2]" -map "[v2]" -map 1:a -c:v libx264 -crf 35 -ss 0 -t 20 -c:a copy -shortest -pix_fmt yuv420p -threads 0 output_withwave_and_progresbar.mp4

  

  But I want to show progress inside generated audio waveform instead of making / filling rectangle using drawbox.

  So I have tried to make 2 waveform of 2 different color and overlay on each other and I wanted to show such a way that top waveform should display only part from x position (left) respective to current time.

  ffmpeg -y -loop 1 -threads 0 -i sample_background.png -i input.mp3 -filter_complex "[0:v]drawbox=0:155:1280:100:gray@1:t=fill[baserect] ;[1:a]aformat=channel_layouts=mono,showwaves=s=1280x100:rate=7:mode=cline:scale=sqrt:colors=0xff0000[waveform] ;[1:a]aformat=channel_layouts=mono,showwaves=s=1280x100:rate=7:mode=cline:scale=sqrt:colors=0xffffff[waveform2] ; [baserect][waveform] overlay=0:155 [v1] ;[v1][waveform2] overlay=x=’if(gte(t,0), -W+(t)*64, NAN)’:y=155:format=yuv444[v2]" -map "[v2]" -map 1:a -c:v libx264 -crf 35 -ss 0 -t 20 -c:a copy -shortest -pix_fmt yuv420p -threads 0 test.mp4

  But I am not able to find way to do Wipe effect from left to right, currently it is sliding (as I am changing x of overlay)
  It might be done using alpha merge and setting all other pixel to transparent and only show pixels which are less than x pos.
  but I am not able to find how to do this.

  Background image :
  

  we can use any mp3 file file, currently I have set 20 sec duration.

  Can someone please guide how we can do this ?

  Thanks.

• Revert "avcodec/proresenc_anatoliy : support for more color matrix for proresenc"

  3 mai 2020, par Limin Wang

  Revert "avcodec/proresenc_anatoliy : support for more color matrix for proresenc"
  This reverts commit e0eed1fd523ec5d0cc390a08c468dbc57316378a.
  

  • [DH] libavcodec/proresenc_anatoliy.c