Re: [FFmpeg-user] sendcmd and drawtext - using more than one in the same filtergraph?

[Mark Burton]

> On 28 Apr 2017, at 16:28, Paul B Mahol  wrote:
> 
> You need to use Parsed_drawtext_X instead of drawtext, replace X with
> number of filter in filtergraph.
> 
> So if its 3rd filter in filtergraph its number will be 2. Because
> lavfi counts from 0.

Ah perfect. Many thanks Paul, working perfectly now!!
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Re: [FFmpeg-user] sendcmd and drawtext - using more than one in the same filtergraph?

[Paul B Mahol]

On 4/28/17, Mark Burton  wrote:
> Using a single sendcmd to read text from an external file and command a
> single drawtext, is working fine:
>
> ffmpeg -i input.mov -c:v dnxhd -b:v 115M -pix_fmt yuv422p -vf
> "sendcmd=filename=commandFile1,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=white:x=10:y=30:text="
> -an output.mov
>
> However I need to have two or more drawtext filters being commanded from
> separate sendcmd files in the same filtergraph.
>
> I believe I need to assign filter instance names to each drawtext command
> and then reference that name for [TARGET] in the sendcmd text file, but
> after reading through the docs and trying a few ideas, I'm no closer.
>
> The basic command (currently not working):
>
> ffmpeg -i input.mov -c:v dnxhd -b:v 115M -pix_fmt yuv422p -vf
> "sendcmd=filename=commandFile1,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=white:x=10:y=30:text=,sendcmd=filename=commandFile2,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=red:x=10:y=60:text="
> -an output.mov
>
> Result:
> drawtext 1 - after 1 frame at each new text entry, text from commandFile2 is
> overriding text from commandFile1.
> drawtext 2 - nothing is being drawn by this filter.
>
> ...contents of the sendcmd files:
>
> commandFile1
> 00:00:00.000-00:00:01.000 [enter] drawtext reinit 'text=Note A';
> 00:00:01.000-00:00:01.958 [enter] drawtext reinit 'text=Note B';
>
> commandFile2
> 00:00:00.000-00:00:01.000 [enter] drawtext reinit 'text=Tag 1';
> 00:00:01.000-00:00:01.958 [enter] drawtext reinit 'text=Tag 2';
>

You need to use Parsed_drawtext_X instead of drawtext, replace X with
number of filter in filtergraph.

So if its 3rd filter in filtergraph its number will be 2. Because
lavfi counts from 0.
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[FFmpeg-user] sendcmd and drawtext - using more than one in the same filtergraph?

[Mark Burton]

Using a single sendcmd to read text from an external file and command a single 
drawtext, is working fine:

ffmpeg -i input.mov -c:v dnxhd -b:v 115M -pix_fmt yuv422p -vf 
"sendcmd=filename=commandFile1,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=white:x=10:y=30:text="
 -an output.mov

However I need to have two or more drawtext filters being commanded from 
separate sendcmd files in the same filtergraph.

I believe I need to assign filter instance names to each drawtext command and 
then reference that name for [TARGET] in the sendcmd text file, but after 
reading through the docs and trying a few ideas, I’m no closer.

The basic command (currently not working):

ffmpeg -i input.mov -c:v dnxhd -b:v 115M -pix_fmt yuv422p -vf 
"sendcmd=filename=commandFile1,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=white:x=10:y=30:text=,sendcmd=filename=commandFile2,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=red:x=10:y=60:text="
 -an output.mov

Result:
drawtext 1 - after 1 frame at each new text entry, text from commandFile2 is 
overriding text from commandFile1.
drawtext 2 - nothing is being drawn by this filter.

...contents of the sendcmd files:

commandFile1
00:00:00.000-00:00:01.000 [enter] drawtext reinit 'text=Note A';
00:00:01.000-00:00:01.958 [enter] drawtext reinit 'text=Note B';

commandFile2
00:00:00.000-00:00:01.000 [enter] drawtext reinit 'text=Tag 1';
00:00:01.000-00:00:01.958 [enter] drawtext reinit 'text=Tag 2';

… and the output:

ffmpeg version N-85641-gdd49eff-tessus Copyright (c) 2000-2017 the FFmpeg 
developers
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg 
--extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl 
--enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm 
--enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb 
--enable-libopencore-amrwb --enable-libopus --enable-libschroedinger 
--enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora 
--enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx 
--enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs 
--enable-libxvid --enable-libzmq --enable-libzvbi --enable-version3 
--disable-ffplay --disable-indev=qtkit
  libavutil      55. 61.100 / 55. 61.100
  libavcodec     57. 93.100 / 57. 93.100
  libavformat    57. 72.101 / 57. 72.101
  libavdevice    57.  7.100 / 57.  7.100
  libavfilter     6. 86.100 /  6. 86.100
  libswscale      4.  7.101 /  4.  7.101
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100
Splitting the commandline.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 
'debug'.
Reading option '-i' ... matched as input url with argument 'input.mov'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 
'dnxhd'.
Reading option '-b:v' ... matched as option 'b' (video bitrate (please use 
-b:v)) with argument '115M'.
Reading option '-pix_fmt' ... matched as option 'pix_fmt' (set pixel format) 
with argument 'yuv422p'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with 
argument 
'sendcmd=filename=commandFile1,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=white:x=10:y=30:text=,
sendcmd=filename=commandFile2,drawtext=fontfile=/System/Library/Fonts/Helvetica.dfont:fontsize=20:fontcolor=red:x=10:y=60:text='.
Reading option '-an' ... matched as option 'an' (disable audio) with argument 
'1'.
Reading option 'output.mov' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input url input.mov.
Successfully parsed a group of options.
Opening an input file: input.mov.
[file @ 0x7f84705002a0] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Format mov,mp4,m4a,3gp,3g2,mj2 
probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] ISO: File Type Major Brand: qt
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Unknown dref type 0x73696c61 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Processing st: 0, edit list 0 - 
media time: 0, duration: 48000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Unknown dref type 0x73696c61 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Processing st: 1, edit list 0 - 
media time: 0, duration: 96000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Unknown dref type 0x73696c61 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Processing st: 2, edit list 0 - 
media time: 0, duration: 48000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f847100] Before avformat_find_stream_info() 
pos: 29676271 bytes read:38355 seeks:1 nb_streams:3
[dnxhd @ 0x7f8471017600] Profile cid 1237.
[dnxhd @ 0x7f8471017600] 1920x1080, 4:2:2