[FFmpeg-user] Resolving -filter_complex overlay / -vf yadif conflicts in subprocess call Python script

[pittschick at me.com]

Gyan, Moritz, Kieran,

Thank you so much for the answers. The script is designed to take a mezzanine file of ProRes or H264 mov origin and allow trimming, deinterlacing (of just the mov, not the watermark), overlay of watermark png, and make copyright metadata additions for supply to clients as viewing copies for computer review etc.  Our archives have progressive and interlaced (upper and lower) mezzanine files reserved for supply to production houses etc, which aren’t appropriate to issue as viewing copies. Instead of keeping two sets of mezzanine files per digitised file - viewing and production supply - we’re looking to generate a script so that anyone can produce an mp4 on demand from one higher level mezzanine.

Gyan, I am pleased to read yadif only works if interlacing is sensed. I see it has an auto mode, but will it differentiate between upper and lower if sensed also? The "[0]yadif=0:-1:1[v];[v][1]overlay” suggestion seems to have worked. I was having issues with the ‘ and “ options, but it functions perfectly this way:

'-filter_complex', "[0]yadif=0:-1:1[v];[v][1]overlay”,

I need to test this more broadly when I get some more video samples, or generate some with FFmpeg.

Thanks Moritz for the reminder that I must take better notice of the failed approaches I’ve tried already. I always rush through things without doing this. I’ll make sure my next FFmpeg-user submission is better prepared :)

Awesome help, thank you!

Joanna



> On 11 Sep 2019, at 12:59, Gyan <ffmpeg at gyani.pro> wrote:
> 
> 
> 
> On 11-09-2019 04:48 PM, digitensions via ffmpeg-user wrote:
>> Hello!
>> 
>> Thanks for admitting me to FFmpeg-user, and thanks to all those who maintain this list. The information I’ve been receiving since joining is outstanding.
>> 
>> This is a bit of a basic question I fear, but searching online hasn’t helped.  I am just co-writing a Python script which uses subprocess calls to run an FFmpeg command. I’ve been try to combine a watermark overlay with a command that uses yadif.  As a command it would run like so:
>> 
>> ffmpeg -i input_file -i watermark.png -filter_complex overlay -c:v libx263 -pix_fmt yuv420p -vf yadif -metadata copyright=“blah” -metadata comment=“contact blah” -c:a aaa -report output_file
>> 
>> For reference, the script is here: https://github.com/digitensions/MACEscripts/blob/master/main.py
>> 
>> My error message:
>> ffmpeg started on 2019-09-11 at 11:12:45
>> Report written to "ffmpeg-20190911-111245.log"
>> ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
>>   built with Apple LLVM version 9.0.0 (clang-900.0.39.2)
>>   configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.3_1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/adoptopenjdk-11.0.2.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/adoptopenjdk-11.0.2.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
>>   libavutil      56. 22.100 / 56. 22.100
>>   libavcodec     58. 35.100 / 58. 35.100
>>   libavformat    58. 20.100 / 58. 20.100
>>   libavdevice    58.  5.100 / 58.  5.100
>>   libavfilter     7. 40.101 /  7. 40.101
>>   libavresample   4.  0.  0 /  4.  0.  0
>>   libswscale      5.  3.100 /  5.  3.100
>>   libswresample   3.  3.100 /  3.  3.100
>>   libpostproc    55.  3.100 / 55.  3.100
>> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/Joanna/Desktop/new(ScriptTest)/[Chimney].mov':
>>   Metadata:
>>     major_brand     : qt
>>     minor_version   : 512
>>     compatible_brands: qt
>>     encoder         : Lavf58.20.100
>>   Duration: 00:00:26.32, start: 0.000000, bitrate: 163608 kb/s
>>     Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(tv, bt709, progressive), 1920x1080, 162452 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 12800 tbn, 12800 tbc (default)
>>     Metadata:
>>       handler_name    : VideoHandler
>>       encoder         : Lavc58.35.100 prores_ks
>>       timecode        : 01:00:00:00
>>     Stream #0:1(eng): Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
>>     Metadata:
>>       handler_name    : SoundHandler
>>     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
>>     Metadata:
>>       handler_name    : TimeCodeHandler
>>       timecode        : 01:00:00:00
>> Input #1, png_pipe, from '/Users/Joanna/Desktop/new(ScriptTest)/bitc/venv/watermarks/FHD.png':
>>   Duration: N/A, bitrate: N/A
>>     Stream #1:0: Video: png, rgba(pc), 1920x1080 [SAR 2835:2835 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
>> Filtergraph 'yadif' was specified through the -vf/-af/-filter option for output stream 0:0, which is fed from a complex filtergraph.
>> -vf/-af/-filter and -filter_complex cannot be used together for the same stream.
>> (venv) Joanna:venv Joanna$
>> 
>> I’m aware my source is progressive, my only available test file at present. I tried a few options combining yadif with the -filter_complex and had no success, but I wonder if those more knowledgeable would have an effective work around, or could point me to one?
> 
> The deinterlacing should be performed before overlay within the same filtergraph, so
> 
>    ffmpeg -i input_file -i watermark.png -filter_complex "[0]yadif=0:-1:1[v];[v][1]overlay"
>           -c:v libx264 -pix_fmt yuv420p -c:a aac
>           -metadata copyright=“blah” -metadata comment=“contact blah” -report output_file
> 
> 
> The yadif filter will only deinterlace if the frame is marked as interlaced.
> 
> 
> Gyan
> 
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