[FFmpeg-user] sendcmd and overlay

[Michael Koch]

I want to use sendcmd to set the x,y coordinates of the overlay filter. 
If I write sendcmd before overlay, I get this error message:
Too many inputs specified for the "sendcmd" filter.
But the two inputs are required for the overlay filter. How can this 
problem be solved?

Console output is below.

Michael


F:\Test>c:\ffmpeg\ffmpeg -i main.mov -i lp.mp4 -filter_complex "[1
]scale=100:100[2];[0][2]sendcmd=f=test.cmd,overlay=x='':y=''" -c:v mpeg4 
-q:v 2
-t 8 -y out.mp4
ffmpeg version git-2020-01-31-62d92a8 Copyright (c) 2000-2020 the FFmpeg 
develop
ers
   built with gcc 9.2.1 (GCC) 20200122
   configuration: --enable-gpl --enable-version3 --enable-sdl2 
--enable-fontconfi
g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d 
--enable-libb
luray --enable-libfreetype --enable-libmp3lame 
--enable-libopencore-amrnb --enab
le-libopencore-amrwb --enable-libopenjpeg --enable-libopus 
--enable-libshine --e
nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame 
--enable
-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 
--enable-libx265 -
-enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib 
--enable-gmp --enab
le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc 
--enable-libmysofa --en
able-libspeex --enable-libxvid --enable-libaom --enable-libmfx 
--enable-ffnvcode
c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec 
--enable-dxva2 -
-enable-avisynth --enable-libopenmpt --enable-amf
   libavutil      56. 38.100 / 56. 38.100
   libavcodec     58. 67.100 / 58. 67.100
   libavformat    58. 37.100 / 58. 37.100
   libavdevice    58.  9.103 / 58.  9.103
   libavfilter     7. 72.100 /  7. 72.100
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000120980] st: 0 edit list: 1 Missing 
key fram
e while searching for timestamp: 3600
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000120980] st: 0 edit list 1 Cannot 
find an in
dex entry before timestamp: 3600.
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'main.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 537986816
     compatible_brands: qt  pana
     creation_time   : 2019-08-29T17:38:28.000000Z
     com.panasonic.Semi-Pro.metadata.xml: <?xml version="1.0" 
encoding="UTF-8" st
andalone="no" ?>
                     : <ClipMain 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-inst
ance" xmlns="urn:schemas-Professional-Plug-in:Semi-Pro:ClipMetadata:v1.0">
                     :   <ClipContent>
                     : 
<GlobalClipID>060A2B340101010501010D21130000005767E053
00BB5534667A1060C1650131</GlobalClipID>
                     :     <Duration>504</Duration>
                     :     <EditUnit>1/50</EditUnit>
                     :     <EssenceList>
                     :       <Video>
                     :         <Codec BitRate="150">H264_420_LongGOP</Codec>
                     : <ActiveLine>2160</ActiveLine>
                     : <ActivePixel>3840</ActivePixel>
                     :         <BitDepth>8</BitDepth>
                     :         <FrameRate>50p</FrameRate>
                     : <TimecodeType>NonDrop</TimecodeType>
                     : <StartTimecode>17:22:03:10</StartTimecode>
                     :       </Video>
                     :       <Audio>
                     :         <Channel>2</Channel>
                     : <SamplingRate>48000</SamplingRate>
                     : <BitsPerSample>16</BitsPerSample>
                     :       </Audio>
                     :     </EssenceList>
                     :     <ClipMetadata>
                     :       <Rating>0</Rating>
                     :       <Access>
                     : <CreationDate>2019-08-29T17:38:28+02:00</CreationD
ate>
                     : <LastUpdateDate>2019-08-29T17:38:28+02:00</LastUpd
ateDate>
                     :       </Access>
                     :       <Device>
                     : <Manufacturer>Panasonic</Manufacturer>
                     : <ModelName>DC-GH5S</ModelName>
                     :       </Device>
                     :       <Shoot>
                     : <StartDate>2019-08-29T17:38:28+02:00</StartDate>
                     :       </Shoot>
                     :     </ClipMetadata>
                     :   </ClipContent>
                     :   <UserArea>
                     :     <AcquisitionMetadata 
xmlns="urn:schemas-Professional-P
lug-in:P2:CameraMetadata:v1.2">
                     :       <CameraUnitMetadata>
                     :         <Gamma>
                     : <CaptureGamma>STANDARD</CaptureGamma>
                     :         </Gamma>
                     :         <Gamut>
                     : <CaptureGamut>BT.709</CaptureGamut>
                     :         </Gamut>
                     :       </CameraUnitMetadata>
                     :     </AcquisitionMetadata>
                     :   </UserArea>
                     : </ClipMain>
                     :
   Duration: 00:00:10.08, start: 0.000000, bitrate: 145991 kb/s
     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), 
yuv420p(tv, bt709)
, 3840x2160 [SAR 1:1 DAR 16:9], 144245 kb/s, 50 fps, 50 tbr, 180k tbn, 
100 tbc (
default)
     Metadata:
       creation_time   : 2019-08-29T17:38:28.000000Z
       timecode        : 08:41:01:35
     Stream #0:1(und): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 
stereo, s1
6, 1536 kb/s (default)
     Metadata:
       creation_time   : 2019-08-29T17:38:28.000000Z
       timecode        : 08:41:01:35
     Stream #0:2(und): Data: none (tmcd / 0x64636D74), 1 kb/s (default)
     Metadata:
       creation_time   : 2019-08-29T17:38:28.000000Z
       timecode        : 08:41:01:35
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'lp.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomiso2avc1mp41
     encoder         : Lavf58.36.100
   Duration: 00:00:08.02, start: 0.000000, bitrate: 12308 kb/s
     Stream #1:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 
1920x1920
, 12206 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
     Metadata:
       handler_name    : Video Handler
     Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, 
stereo, flt
p, 128 kb/s (default)
     Metadata:
       handler_name    : Audio Handler
[AVFilterGraph @ 00000000073d18c0] Too many inputs specified for the 
"sendcmd" f
ilter.
Error initializing complex filters.
Invalid argument