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• How could I add an overlay to a video based on mouse cursor coordinates ?

  5 mars 2023, par Dima

  I am making a web app, where the user clicks through some images while talking about them and pointing things out with the cursor. The audio, timestamps of image changes, and mouse cursor coordinates and times are sent to a php script which uses ffmpeg to make a slideshow from the images and audio.

  


  Then it runs another ffmpeg command to overlay a moving image representing the cursor hundreds of times to mimic the user's mouse movements.

  


  Here is an example command that inserts the mouse overlay :

  


  ffmpeg \
  -i ../tmp/6400d9c21a62d.mp4 \
  -i ../assets/mouse-circle.png \
  -filter_complex "[0:v][1:v]overlay=enable='between=(t,0.627,0.874)':x=777.648+(t-0.627)*0.000/0.247:y=937.572+(t-0.627)*0.000/0.247[a1]; \
    [a1][1:v]overlay=enable='between=(t,0.874,0.914)':x=777.648+(t-0.874)*0.000/0.040:y=937.572+(t-0.874)*-1.223/0.040[a2]; \
    [a2][1:v]overlay=enable='between=(t,0.914,0.936)':x=777.648+(t-0.914)*0.000/0.022:y=936.349+(t-0.914)*0.000/0.022[a3]; \
    [a3][1:v]overlay=enable='between=(t,0.936,0.945)':x=777.648+(t-0.936)*0.000/0.009:y=936.349+(t-0.936)*-1.223/0.009[a4]; \
    [a4][1:v]overlay=enable='between=(t,0.945,0.966)':x=777.648+(t-0.945)*0.000/0.021:y=935.127+(t-0.945)*-1.223/0.021[a5]; \
    [a5][1:v]overlay=enable='between=(t,0.966,0.976)':x=777.648+(t-0.966)*0.000/0.010:y=933.904+(t-0.966)*-1.223/0.010[a6]; \
    [a6][1:v]overlay=enable='between=(t,0.976,0.999)':x=777.648+(t-0.976)*0.000/0.023:y=932.682+(t-0.976)*0.000/0.023[a7]; \
    [a7][1:v]overlay=enable='between=(t,0.999,1.019)':x=777.648+(t-0.999)*1.227/0.020:y=932.682+(t-0.999)*-1.223/0.020[a8]; \
    [a8][1:v]overlay=enable='between=(t,1.019,1.039)':x=778.875+(t-1.019)*0.000/0.020:y=931.459+(t-1.019)*-1.223/0.020[a9]; \
    [a9][1:v]overlay=enable='between=(t,1.039,1.091)':x=778.875+(t-1.039)*0.000/0.052:y=930.236+(t-1.039)*0.000/0.052[a10]; \
    [a10][1:v]overlay=enable='between=(t,1.091,1.142)':x=778.875+(t-1.091)*0.000/0.051:y=930.236+(t-1.091)*-1.223/0.051[a11]; \
    [a11][1:v]overlay=enable='between=(t,1.142,1.152)':x=778.875+(t-1.142)*0.000/0.010:y=929.014+(t-1.142)*-1.223/0.010[a12]; \
    [a12][1:v]overlay=enable='between=(t,1.152,1.161)':x=778.875+(t-1.152)*0.000/0.009:y=927.791+(t-1.152)*-1.223/0.009[a13]; \
    [a13][1:v]overlay=enable='between=(t,1.161,1.173)':x=778.875+(t-1.161)*2.454/0.012:y=926.569+(t-1.161)*-3.668/0.012[a14]; \
    [a14][1:v]overlay=enable='between=(t,1.173,1.184)':x=781.329+(t-1.173)*0.000/0.011:y=922.901+(t-1.173)*-8.558/0.011[a15]; \
    [a15][1:v]overlay=enable='between=(t,1.184,1.193)':x=781.329+(t-1.184)*0.000/0.009:y=914.343+(t-1.184)*-4.890/0.009[a16]; \
    [a16][1:v]overlay=enable='between=(t,1.193,1.203)':x=781.329+(t-1.193)*0.000/0.010:y=909.452+(t-1.193)*-3.668/0.010[a17]; \
    [a17][1:v]overlay=enable='between=(t,1.203,1.213)':x=781.329+(t-1.203)*0.000/0.010:y=905.784+(t-1.203)*-8.558/0.010[a18]; \
    [a18][1:v]overlay=enable='between=(t,1.213,1.223)':x=781.329+(t-1.213)*0.000/0.010:y=897.226+(t-1.213)*-4.890/0.010[a19]; \
    [a19][1:v]overlay=enable='between=(t,1.223,1.234)':x=781.329+(t-1.223)*0.000/0.011:y=892.336+(t-1.223)*-3.668/0.011[a20]; \
    [a20][1:v]overlay=enable='between=(t,1.234,1.246)':x=781.329+(t-1.234)*0.000/0.012:y=888.668+(t-1.234)*-8.558/0.012[a21]; \
    [a21][1:v]overlay=enable='between=(t,1.246,1.256)':x=781.329+(t-1.246)*0.000/0.010:y=880.110+(t-1.246)*-3.668/0.010[a22]; \
    [a22][1:v]overlay=enable='between=(t,1.256,1.265)':x=781.329+(t-1.256)*0.000/0.009:y=876.442+(t-1.256)*-4.890/0.009[a23]; \
    [a23][1:v]overlay=enable='between=(t,1.265,1.282)':x=781.329+(t-1.265)*0.000/0.017:y=871.551+(t-1.265)*-8.558/0.017[a24]; \
    [a24][1:v]overlay=enable='between=(t,1.282,1.298)':x=781.329+(t-1.282)*1.227/0.016:y=862.993+(t-1.282)*-8.558/0.016[a25]; \
    [a25][1:v]overlay=enable='between=(t,1.298,1.316)':x=782.556+(t-1.298)*0.000/0.018:y=854.435+(t-1.298)*-8.558/0.018[a26]; \
    [a26][1:v]overlay=enable='between=(t,1.316,1.331)':x=782.556+(t-1.316)*2.454/0.015:y=845.877+(t-1.316)*-8.558/0.015[a27]; \
    [a27][1:v]overlay=enable='between=(t,1.331,1.349)':x=785.010+(t-1.331)*0.000/0.018:y=837.318+(t-1.331)*-3.668/0.018[a28]; \
    [a28][1:v]overlay=enable='between=(t,1.349,1.365)':x=785.010+(t-1.349)*2.454/0.016:y=833.651+(t-1.349)*-13.449/0.016[a29]; \
    [a29][1:v]overlay=enable='between=(t,1.365,1.382)':x=787.464+(t-1.365)*3.681/0.017:y=820.202+(t-1.365)*-13.449/0.017[a30]; \
    [a30][1:v]overlay=enable='between=(t,1.382,1.399)':x=791.145+(t-1.382)*0.000/0.017:y=806.753+(t-1.382)*-8.558/0.017[a31]; \
    [a31][1:v]overlay=enable='between=(t,1.399,1.415)':x=791.145+(t-1.399)*4.908/0.016:y=798.195+(t-1.399)*-13.449/0.016[a32]; \
    [a32][1:v]overlay=enable='between=(t,1.415,1.433)':x=796.053+(t-1.415)*2.454/0.018:y=784.746+(t-1.415)*-17.116/0.018[a33]; \
    [a33][1:v]overlay=enable='between=(t,1.433,1.449)':x=798.507+(t-1.433)*3.681/0.016:y=767.630+(t-1.433)*-8.558/0.016[a34]; \
    [a34][1:v]overlay=enable='between=(t,1.449,1.466)':x=802.188+(t-1.449)*6.135/0.017:y=759.072+(t-1.449)*-18.339/0.017[a35]; \
    [a35][1:v]overlay=enable='between=(t,1.466,1.482)':x=808.323+(t-1.466)*2.454/0.016:y=740.733+(t-1.466)*-8.558/0.016[a36]; \
    [a36][1:v]overlay=enable='between=(t,1.482,1.499)':x=810.777+(t-1.482)*6.135/0.017:y=732.174+(t-1.482)*-18.339/0.017[a37]; \
    [a37][1:v]overlay=enable='between=(t,1.499,1.516)':x=816.912+(t-1.499)*8.589/0.017:y=713.835+(t-1.499)*-14.671/0.017[a38]; \
    [a38][1:v]overlay=enable='between=(t,1.516,1.532)':x=825.501+(t-1.516)*3.681/0.016:y=699.164+(t-1.516)*-8.558/0.016[a39]; \
    [a39][1:v]overlay=enable='between=(t,1.532,1.549)':x=829.181+(t-1.532)*4.908/0.017:y=690.606+(t-1.532)*-13.449/0.017[a40]; \
    [a40][1:v]overlay=enable='between=(t,1.549,1.565)':x=834.089+(t-1.549)*8.589/0.016:y=677.157+(t-1.549)*-14.671/0.016[a41]; \
    [a41][1:v]overlay=enable='between=(t,1.565,1.583)':x=842.678+(t-1.565)*2.454/0.018:y=662.486+(t-1.565)*-8.558/0.018[a42]; \
    [a42][1:v]overlay=enable='between=(t,1.583,1.599)':x=845.132+(t-1.583)*8.589/0.016:y=653.928+(t-1.583)*-14.671/0.016[a43]; \
    [a43][1:v]overlay=enable='between=(t,1.599,1.616)':x=853.721+(t-1.599)*2.454/0.017:y=639.257+(t-1.599)*-4.890/0.017[a44]; \
    [a44][1:v]overlay=enable='between=(t,1.616,1.632)':x=856.175+(t-1.616)*9.816/0.016:y=634.366+(t-1.616)*-18.339/0.016[a45]; \
    [a45][1:v]overlay=enable='between=(t,1.632,1.649)':x=865.991+(t-1.632)*8.589/0.017:y=616.027+(t-1.632)*-14.671/0.017[a46]; \
    [a46][1:v]overlay=enable='between=(t,1.649,1.666)':x=874.580+(t-1.649)*6.135/0.017:y=601.356+(t-1.649)*-9.781/0.017[a47]; \
    [a47][1:v]overlay=enable='between=(t,1.666,1.682)':x=880.715+(t-1.666)*8.589/0.016:y=591.575+(t-1.666)*-14.671/0.016[a48]; \
    [a48][1:v]overlay=enable='between=(t,1.682,1.699)':x=889.303+(t-1.682)*8.589/0.017:y=576.904+(t-1.682)*-14.671/0.017[a49]; \
    [a49][1:v]overlay=enable='between=(t,1.699,1.716)':x=897.892+(t-1.699)*6.135/0.017:y=562.232+(t-1.699)*-4.890/0.017[a50]; \
    [a50][1:v]overlay=enable='between=(t,1.716,1.732)':x=904.027+(t-1.716)*8.589/0.016:y=557.342+(t-1.716)*-14.671/0.016[a51]; \
    [a51][1:v]overlay=enable='between=(t,1.732,1.749)':x=912.616+(t-1.732)*7.362/0.017:y=542.671+(t-1.732)*-9.781/0.017[a52]; \
    [a52][1:v]overlay=enable='between=(t,1.749,1.766)':x=919.978+(t-1.749)*8.589/0.017:y=532.890+(t-1.749)*-14.671/0.017[a53]; \
    [a53][1:v]overlay=enable='between=(t,1.766,1.782)':x=928.567+(t-1.766)*4.908/0.016:y=518.219+(t-1.766)*-4.890/0.016[a54]; \
    [a54][1:v]overlay=enable='between=(t,1.782,1.799)':x=933.475+(t-1.782)*8.589/0.017:y=513.328+(t-1.782)*-11.003/0.017[a55]; \
    [a55][1:v]overlay=enable='between=(t,1.799,1.815)':x=942.063+(t-1.799)*7.362/0.016:y=502.325+(t-1.799)*-9.781/0.016[a56]; \
    [a56][1:v]overlay=enable='between=(t,1.815,1.832)':x=949.425+(t-1.815)*6.135/0.017:y=492.544+(t-1.815)*-4.890/0.017[a57]; \
    [a57][1:v]overlay=enable='between=(t,1.832,1.849)':x=955.560+(t-1.832)*6.135/0.017:y=487.654+(t-1.832)*-7.336/0.017[a58]; \
    [a58][1:v]overlay=enable='between=(t,1.849,1.866)':x=961.695+(t-1.849)*6.135/0.017:y=480.318+(t-1.849)*-3.668/0.017[a59]; \
    [a59][1:v]overlay=enable='between=(t,1.866,1.883)':x=967.830+(t-1.866)*1.227/0.017:y=476.650+(t-1.866)*-1.223/0.017[a60]; \
    [a60][1:v]overlay=enable='between=(t,1.883,1.900)':x=969.057+(t-1.883)*8.589/0.017:y=475.427+(t-1.883)*-2.445/0.017[a61]; \
    [a61][1:v]overlay=enable='between=(t,1.900,1.916)':x=977.646+(t-1.900)*6.135/0.016:y=472.982+(t-1.900)*-1.223/0.016[a62]; \
    [a62][1:v]overlay=enable='between=(t,1.916,1.933)':x=983.781+(t-1.916)*1.227/0.017:y=471.760+(t-1.916)*0.000/0.017[a63]; \
    [a63][1:v]overlay=enable='between=(t,1.933,1.949)':x=985.008+(t-1.933)*1.227/0.016:y=471.760+(t-1.933)*0.000/0.016[a64]; \
    [a64][1:v]overlay=enable='between=(t,1.949,1.966)':x=986.235+(t-1.949)*1.227/0.017:y=471.760+(t-1.949)*0.000/0.017[a65]; \
    [a65][1:v]overlay=enable='between=(t,1.966,1.983)':x=987.462+(t-1.966)*2.454/0.017:y=471.760+(t-1.966)*0.000/0.017[a66]; \
    [a66][1:v]overlay=enable='between=(t,1.983,2.000)':x=989.916+(t-1.983)*0.000/0.017:y=471.760+(t-1.983)*0.000/0.017[a67]; \
    [a67][1:v]overlay=enable='between=(t,2.000,2.016)':x=989.916+(t-2.000)*0.000/0.016:y=471.760+(t-2.000)*1.223/0.016[a68]; \
    [a68][1:v]overlay=enable='between=(t,2.016,2.033)':x=989.916+(t-2.016)*2.454/0.017:y=472.982+(t-2.016)*2.445/0.017[a69]; \
    [a69][1:v]overlay=enable='between=(t,2.033,2.050)':x=992.370+(t-2.033)*0.000/0.017:y=475.427+(t-2.033)*1.223/0.017[a70]; \
    [a70][1:v]overlay=enable='between=(t,2.050,2.066)':x=992.370+(t-2.050)*2.454/0.016:y=476.650+(t-2.050)*8.558/0.016[a71]; \
    [a71][1:v]overlay=enable='between=(t,2.066,2.082)':x=994.824+(t-2.066)*0.000/0.016:y=485.208+(t-2.066)*7.336/0.016[a72]; \
    [a72][1:v]overlay=enable='between=(t,2.082,2.100)':x=994.824+(t-2.082)*0.000/0.018:y=492.544+(t-2.082)*4.890/0.018[a73]; \
    [a73][1:v]overlay=enable='between=(t,2.100,2.116)':x=994.824+(t-2.100)*3.681/0.016:y=497.434+(t-2.100)*13.449/0.016[a74]; \
    [a74][1:v]overlay=enable='between=(t,2.116,2.134)':x=998.504+(t-2.116)*0.000/0.018:y=510.883+(t-2.116)*7.336/0.018[a75]; \
    [a75][1:v]overlay=enable='between=(t,2.134,2.150)':x=998.504+(t-2.134)*0.000/0.016:y=518.219+(t-2.134)*8.558/0.016[a76]; \
    [a76][1:v]overlay=enable='between=(t,2.150,2.167)':x=998.504+(t-2.150)*0.000/0.017:y=526.777+(t-2.150)*17.116/0.017[a77]; \
    [a77][1:v]overlay=enable='between=(t,2.167,2.183)':x=998.504+(t-2.167)*-7.362/0.016:y=543.893+(t-2.167)*24.452/0.016[a78]; \
    [a78][1:v]overlay=enable='between=(t,2.183,2.200)':x=991.143+(t-2.183)*0.000/0.017:y=568.345+(t-2.183)*8.558/0.017[a79]; \
    [a79][1:v]overlay=enable='between=(t,2.200,2.217)':x=991.143+(t-2.200)*-6.135/0.017:y=576.904+(t-2.200)*23.229/0.017[a80]; \
    [a80][1:v]overlay=enable='between=(t,2.217,2.233)':x=985.008+(t-2.217)*-3.681/0.016:y=600.133+(t-2.217)*14.671/0.016[a81]; \
    [a81][1:v]overlay=enable='between=(t,2.233,2.251)':x=981.327+(t-2.233)*-12.270/0.018:y=614.804+(t-2.233)*36.678/0.018[a82]; \
    [a82][1:v]overlay=enable='between=(t,2.251,2.267)':x=969.057+(t-2.251)*-3.681/0.016:y=651.483+(t-2.251)*14.671/0.016[a83]; \
    [a83][1:v]overlay=enable='between=(t,2.267,2.284)':x=965.376+(t-2.267)*-12.270/0.017:y=666.154+(t-2.267)*36.678/0.017[a84]; \
    [a84][1:v]overlay=enable='between=(t,2.284,2.301)':x=953.106+(t-2.284)*-15.951/0.017:y=702.832+(t-2.284)*31.788/0.017[a85]; \
    [a85][1:v]overlay=enable='between=(t,2.301,2.317)':x=937.156+(t-2.301)*-7.362/0.016:y=734.620+(t-2.301)*14.671/0.016[a86]; \
    [a86][1:v]overlay=enable='between=(t,2.317,2.334)':x=929.794+(t-2.317)*-14.724/0.017:y=749.291+(t-2.317)*25.675/0.017[a87]; \
    [a87][1:v]overlay=enable='between=(t,2.334,2.350)':x=915.070+(t-2.334)*-7.362/0.016:y=774.966+(t-2.334)*15.894/0.016[a88]; \
    [a88][1:v]overlay=enable='between=(t,2.350,2.367)':x=907.708+(t-2.350)*-14.724/0.017:y=790.859+(t-2.350)*25.675/0.017[a89]; \
    [a89][1:v]overlay=enable='between=(t,2.367,2.384)':x=892.984+(t-2.367)*-18.405/0.017:y=816.534+(t-2.367)*20.784/0.017[a90]; \
    [a90][1:v]overlay=enable='between=(t,2.384,2.400)':x=874.580+(t-2.384)*-6.135/0.016:y=837.318+(t-2.384)*11.003/0.016[a91]; \
    [a91][1:v]overlay=enable='between=(t,2.400,2.418)':x=868.445+(t-2.400)*-11.043/0.018:y=848.322+(t-2.400)*9.781/0.018[a92]; \
    [a92][1:v]overlay=enable='between=(t,2.418,2.434)':x=857.402+(t-2.418)*-9.816/0.016:y=858.103+(t-2.418)*8.558/0.016[a93]; \
    [a93][1:v]overlay=enable='between=(t,2.434,2.451)':x=847.586+(t-2.434)*-6.135/0.017:y=866.661+(t-2.434)*4.890/0.017[a94]; \
    [a94][1:v]overlay=enable='between=(t,2.451,2.467)':x=841.451+(t-2.451)*-8.589/0.016:y=871.551+(t-2.451)*4.890/0.016[a95]; \
    [a95][1:v]overlay=enable='between=(t,2.467,2.484)':x=832.862+(t-2.467)*-1.227/0.017:y=876.442+(t-2.467)*1.223/0.017[a96]; \
    [a96][1:v]overlay=enable='between=(t,2.484,2.501)':x=831.635+(t-2.484)*-6.135/0.017:y=877.664+(t-2.484)*3.668/0.017[a97]; \
    [a97][1:v]overlay=enable='between=(t,2.501,2.517)':x=825.501+(t-2.501)*-8.589/0.016:y=881.332+(t-2.501)*2.445/0.016[a98]; \
    [a98][1:v]overlay=enable='between=(t,2.517,2.535)':x=816.912+(t-2.517)*-2.454/0.018:y=883.777+(t-2.517)*1.223/0.018[a99]; \
    [a99][1:v]overlay=enable='between=(t,2.535,2.551)':x=814.458+(t-2.535)*-2.454/0.016:y=885.000+(t-2.535)*2.445/0.016[a100]; \
    [a100][1:v]overlay=enable='between=(t,2.551,2.567)':x=812.004+(t-2.551)*-1.227/0.016:y=887.445+(t-2.551)*0.000/0.016[a101]; \
    [a101][1:v]overlay=enable='between=(t,2.567,2.584)':x=810.777+(t-2.567)*-1.227/0.017:y=887.445+(t-2.567)*0.000/0.017[a102]; \
    [a102][1:v]overlay=enable='between=(t,2.584,2.600)':x=809.550+(t-2.584)*0.000/0.016:y=887.445+(t-2.584)*0.000/0.016[a103]; \
    [a103][1:v]overlay=enable='between=(t,2.600,2.617)':x=809.550+(t-2.600)*-1.227/0.017:y=887.445+(t-2.600)*0.000/0.017[a104]; \
    [a104][1:v]overlay=enable='between=(t,2.617,2.689)':x=808.323+(t-2.617)*0.000/0.072:y=887.445+(t-2.617)*0.000/0.072[a105] \
     \
  " -map "[a105]" -map 0:a:? ../tmp/vid-6400d9c21a62d.mp4 -y


  


  And this is just from a four second video. When I tried to do thirty seconds worth of mouse movements, the command would not even run because there were too many arguments. So I need to come up with another way to add a mouse overlay.

  


  An obvious choice would just be screen recording the user's screen to not have to add a mouse overlay because it would already be there. But then I don't think I can use full resolution pictures in the final video. It will be recordings of the images at whatever resolution the user's screen is set to. (Unless there's a way around this that I don't know about.)

  


  So how could I take a long list of mouse coordinates and timestamps and add an overlay representing a cursor to an existing video ?

  


  Edit : I tried putting everything from the filter-complex argument into a text file and calling it with filter_complex_script instead, as @БаярГончикжапов suggested in comments. Now it at least starts to run, but every time fails with this error :

  


  [Parsed_overlay_1553 @ 0x55caae67f900] [framesync @ 0x55caae6802a8] Sync level 2
[auto_scale_1554 @ 0x55cab4b34b80] Failed to configure output pad on auto_scale_1554
Error reinitializing filters!
Failed to inject frame into filter network: Resource temporarily unavailable
Error while processing the decoded data for stream #1:0
[AVIOContext @ 0x55cab451c900] Statistics: 0 bytes written, 0 seeks, 0 writeouts
[aac @ 0x55cab4523b80] Qavg: 25282.062
[aac @ 0x55cab4523b80] 2 frames left in the queue on closing


  


  It only happens if there are more than 1553 arguments, and changing the arguments for 1553 and surrounding ones doesn't stop the error.

  


• mouse cursor strange within office 2010 ppt presentation video

  5 décembre 2015, par Wesley

  I hit a problem that record office 2010 ppt presentation.

  I wanna record ppt presentation process,so, here is my steps :
  1. open and ppt file
  2. press F5 to start the presentation
  3. use third party tool to record the screen
  4. during presentation, press CTRL+P to open the mark pen(on screen, it’s laser point)

  So, here comes the problem :
  After I finished the video record, when I play the vedio, the cursor is very strange to be an bold red plus, like below :
  

  It’s really ugly..
  Actually I want it to be a icon like a pen, or at least to be a laser point as default.
  Firstly I thought it to be problem with my screen recording tool, so I write a script with python to record presentation screen using ffmpeg, but, with the same result..

  So, anyone hit this before ?
  How to fix this ?

  Thanks.
  Wesley

• ffmpeg - top coded first (swapped) vs progressive -top 1 does not stick

  21 septembre 2020, par Selene

  please help :
I'm encoding a video, and because of my specific use-case, I have to encode it twice, in sequence, so that the output from the first run of ffmpeg goes into second encoding of ffmpeg as an input. I use "-top 1" option to force "top coded first (swapped)".

  


  When encoding the first iteration of encoding, everything works great (output from ffprobe below) :

  


  Duration: 00:00:22.16, start: 0.000000, bitrate: 61390 kb/s
    Stream #0:0(eng): Video: mpeg2video (4:2:2) (xd5c / 0x63356478), yuv422p(tv, bt709, top coded first (swapped)), 1920x1080 ... etc-etc.


  


  However, when I run the second iteration, the "top coded first (swapped)" switches to "progressive"

  


  I tried removing the "top 1" option from my first iteration and only add it to the second, without success". What am I doing wrong ? Please advise.
The first iteration adds special watermark on the video, hence the filter_complex :

  


  ffmpeg -i pre-input.mov -c:v prores_ks -profile:v 3 -pix_fmt yuv422p10le -b:v 178458816 -maxrate 178458816 -minrate 178458816 -r 29.97 -top 1 -color_primaries bt709 -color_trc bt709 -colorspace bt709 -vtag apch -c:a copy -c:s copy -qscale 0 -filter_complex " my_filter=enable='between(t,2,22)':x=1050:y=108:size=184:contrast=40:string=hello " -y output.mov


  


  Just to be clear, same parameters as on the second iteration, and produces exactly what I need.

  


  The only thing I'd add is that on my second iteration I'm using :

  


  ffmpeg -i input.mov -filter_complex " [0][1]overlay=1504:214:enable='between(t,2,3.600)'[v1] ; [v1][2]overlay=1504:214:enable='between(t,4,5.500)'[v2] ; [v2][3]overlay=1504:214:enable='between(t,6,20)'[v3]" -map '[v3]' -map 0:a ... etc-etc.

  


  from the 3 images that I'm overlaying on top of the video.