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• Perspective filter in ffmpeg - quality

  15 novembre 2018, par Makes

  I put a picture on the video using the perspective filter.

  Example https://yadi.sk/i/MXtWUArJ3TyWBm

  How can I improve the quality ?

  

  Code

  ffmpeg -y -i bg.mp4 -loop 1 -i image.jpg -filter_complex "[1]drawtext=fontfile=PF.ttf:text=Test: fontcolor=white:fontsize=150:x=(w-text_w)/2:y=(h-text_h)/2:alpha=1[txt];[txt]format=rgba,pad=iw+4:ih+4:2:2:white@0,perspective=enable='eq(n,0)':x0=494.928:y0=209.322:x1=946.974:y1=223.928:x2=466.575:y2=515.535:x3=913.465:y3=564.508:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,1)':x0=492.97:y0=209.34:x1=946.723:y1=223.275:x2=464.979:y2=516.19:x3=914.211:y3=563.625:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,2)':x0=491.079:y0=209.336:x1=946.611:y1=222.44:x2=463.872:y2=517.063:x3=915.323:y3=562.806:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,3)':x0=489.485:y0=209.641:x1=946.927:y1=221.562:x2=463.444:y2=518.187:x3=917.129:y3=561.776:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,4)':x0=488.11:y0=210.139:x1=947.318:y1=220.795:x2=463.353:y2=519.447:x3=919.386:y3=560.902:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,5)':x0=486.944:y0=210.591:x1=948.048:y1=219.901:x2=463.424:y2=520.868:x3=921.62:y3=559.961:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,6)':x0=485.949:y0=211.241:x1=948.931:y1=219.289:x2=463.725:y2=522.28:x3=924.003:y3=559.139:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,7)':x0=484.966:y0=211.809:x1=949.696:y1=218.828:x2=464.036:y2=523.807:x3=926.451:y3=558.422:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,8)':x0=484.154:y0=212.491:x1=950.715:y1=218.643:x2=464.476:y2=525.458:x3=928.879:y3=558.026:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,9)':x0=483.478:y0=213.159:x1=951.889:y1=218.627:x2=464.986:y2=526.948:x3=931.192:y3=557.65:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,10)':x0=482.931:y0=213.894:x1=952.765:y1=218.773:x2=465.38:y2=528.531:x3=933.623:y3=557.31:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,11)':x0=482.236:y0=214.325:x1=953.627:y1=218.692:x2=465.659:y2=529.823:x3=935.771:y3=556.807:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,12)':x0=481.557:y0=214.712:x1=954.293:y1=218.545:x2=465.915:y2=531.067:x3=937.621:y3=556.196:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,13)':x0=480.524:y0=214.949:x1=954.537:y1=218.358:x2=465.958:y2=532.204:x3=939.177:y3=555.434:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,14)':x0=479.39:y0=214.982:x1=954.715:y1=217.96:x2=465.792:y2=533.019:x3=940.467:y3=554.715:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,15)':x0=478.214:y0=214.901:x1=954.724:y1=217.568:x2=465.374:y2=533.843:x3=941.367:y3=553.849:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,16)':x0=476.725:y0=214.761:x1=954.269:y1=217.646:x2=464.356:y2=534.599:x3=941.491:y3=553.492:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,17)':x0=475.334:y0=214.58:x1=953.56:y1=217.797:x2=463.221:y2=535.186:x3=941.48:y3=553.23:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,18)':x0=473.903:y0=214.167:x1=952.701:y1=218.158:x2=461.715:y2=535.296:x3=940.785:y3=552.962:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,19)':x0=472.495:y0=213.096:x1=951.832:y1=218.516:x2=460.065:y2=534.789:x3=939.837:y3=552.757:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,20)':x0=471.281:y0=211.607:x1=950.935:y1=218.945:x2=458.138:y2=533.884:x3=938.614:y3=552.495:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,21)':x0=469.713:y0=209.613:x1=949.795:y1=219.433:x2=455.859:y2=532.596:x3=936.618:y3=552.357:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,22)':x0=468.369:y0=207.397:x1=948.667:y1=219.849:x2=453.532:y2=531.159:x3=934.257:y3=552.38:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,23)':x0=466.699:y0=205.104:x1=947.26:y1=220.454:x2=451:y2=529.693:x3=931.619:y3=552.292:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,24)':x0=465.14:y0=202.656:x1=945.657:y1=220.984:x2=448.541:y2=528.1:x3=928.819:y3=552.119:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,25)':x0=463.654:y0=200.211:x1=943.684:y1=221.754:x2=445.881:y2=526.374:x3=925.948:y3=551.82:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,26)':x0=462.27:y0=198.113:x1=941.55:y1=222.567:x2=443.463:y2=524.768:x3=922.871:y3=551.705:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,27)':x0=460.862:y0=195.791:x1=939.386:y1=223.475:x2=441.08:y2=523.19:x3=919.645:y3=551.548:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,28)':x0=459.766:y0=193.607:x1=937.438:y1=224.545:x2=438.891:y2=521.673:x3=916.406:y3=551.701:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,29)':x0=458.882:y0=191.27:x1=935.409:y1=225.862:x2=436.825:y2=520.193:x3=913.095:y3=552.098:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,30)':x0=458.365:y0=189.02:x1=933.821:y1=227.087:x2=434.821:y2=518.642:x3=909.654:y3=552.564:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,31)':x0=458.29:y0=186.899:x1=932.551:y1=228.709:x2=433.302:y2=517.208:x3=906.326:y3=553.304:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,32)':x0=458.534:y0=184.934:x1=930.92:y1=230.425:x2=431.853:y2=516.033:x3=903.419:y3=554.001:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,33)':x0=458.973:y0=183.577:x1=929.578:y1=232.315:x2=431.13:y2=515.161:x3=900.86:y3=554.747:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,34)':x0=459.577:y0=182.54:x1=928.307:y1=233.674:x2=430.997:y2=514.572:x3=898.767:y3=555.186:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,35)':x0=460.128:y0=181.739:x1=927.047:y1=234.729:x2=431.09:y2=514.372:x3=897.07:y3=555.338:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,36)':x0=460.374:y0=181.922:x1=925.621:y1=235.331:x2=431.847:y2=515.292:x3=895.692:y3=555.167:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,37)':x0=460.753:y0=182.276:x1=924.459:y1=235.765:x2=432.684:y2=516.469:x3=894.378:y3=554.91:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,38)':x0=461.243:y0=183.165:x1=923.532:y1=235.814:x2=434.423:y2=518.171:x3=893.91:y3=554.282:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,39)':x0=462.261:y0=184.321:x1=922.722:y1=235.728:x2=436.987:y2=519.999:x3=894.108:y3=553.774:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,40)':x0=463.496:y0=185.537:x1=921.991:y1=235.75:x2=439.757:y2=521.98:x3=894.772:y3=553.112:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,41)':x0=465.548:y0=187.001:x1=921.493:y1=236.09:x2=443.323:y2=523.869:x3=895.942:y3=552.546:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,42)':x0=467.664:y0=188.186:x1=921.479:y1=236.337:x2=447.079:y2=525.676:x3=897.284:y3=552.21:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,43)':x0=470.423:y0=189.241:x1=921.748:y1=236.699:x2=451.338:y2=527.352:x3=898.81:y3=551.862:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,44)':x0=473.639:y0=190.325:x1=922.383:y1=237.261:x2=455.379:y2=529.192:x3=900.266:y3=551.685:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,45)':x0=477.198:y0=191.58:x1=923.242:y1=237.755:x2=459.701:y2=531.055:x3=902.031:y3=551.569:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,46)':x0=480.253:y0=193.004:x1=923.946:y1=238.03:x2=463.948:y2=533.023:x3=903.631:y3=551.247:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,47)':x0=483.194:y0=194.515:x1=924.427:y1=238.145:x2=468.08:y2=535.374:x3=905.248:y3=550.784:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,48)':x0=485.61:y0=196.362:x1=924.407:y1=237.946:x2=472.316:y2=537.937:x3=906.965:y3=550.089:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,49)':x0=487.797:y0=198.385:x1=924.227:y1=237.506:x2=476.379:y2=540.47:x3=908.458:y3=549.279:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,50)':x0=489.67:y0=200.238:x1=923.762:y1=237.106:x2=480.302:y2=542.749:x3=909.865:y3=548.399:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,51)':x0=491.551:y0=201.666:x1=923.505:y1=236.35:x2=483.796:y2=544.49:x3=910.801:y3=547.21:interpolation=0:sense=1:eval=0,perspective=enable='eq(n,52)':x0=493.366:y0=202.541:x1=923.243:y1=235.724:x2=486.788:y2=545.948:x3=911.598:y3=546.166:interpolation=0:sense=1:eval=0[p];[p]scale=w=1280:h=-1[temp];[0][temp]overlay=-2:-2:shortest=1 [v]" -map "[v]" preview.mp4

• merging sensor data and a video with ffmpeg on android

  21 juin 2020, par hannes

  I have a recorded video file and a simultaneously recorded csv-file with sensor data in external storage on android. Now I need to overlay the sensor data to the video and save it again.

  


  At the moment I try to do it with ffmpeg. My approach is to write one value of the sensor data to a textfile which can be used as input for the drawtext command. After the frame is generated the textfile file should be updated with the next sensor value and so on. In combination with reload=1 I think this should work. My Problem is that I don't know when a frame was created by ffmpeg to update the textfile ? Do I need to pause the ffmpeg command until the textfile has been updated ?

  


  Or does someone have another (better) idea ?

  


• FFmpeg Auto Level, Auto Color etc similar to YouTube's Auto-Fix

  22 juin 2019, par Umer

  I used to use YouTube Auto-Fix which presumably auto fixed levels, color, contrast and added a bit of vibrance (it was almost always a bit high saturated which i kinda liked).

  I am looking for an alternate in ffmpeg. I tried using -vf pp=al but it only lightens the video.

  Any ideas ?

  P.S. I can do this in Premiere/After Effects but am looking for a ffmpeg solution.