[FFmpeg-user] preset files

[Francois Visagie]

> -----Original Message-----
> From: ffmpeg-user [mailto:ffmpeg-user-bounces at ffmpeg.org] On Behalf Of
> Scott Johnson
> Sent: 31 August 2018 15:07
> To: ffmpeg-user at ffmpeg.org
> Subject: [FFmpeg-user] preset files
> 
> Hi Everyone,
> 
> 
> 
> Here is a newbie question.
> 
> 
> 
> I have a C++ API that uses FFmpeg to stream an IP camera to my application.
> I can not pass any variables to the background call to FFmpeg, other than
> the source rtsp and transport type call.
> 
> 
> 
> Here is the command I used to test the FFmpeg settings to make it work with
> my camera. Or should I say, here is the command I had to build to get it to
> work.
> 
> 
> 
> ffmpeg -rtsp_transport tcp -i "rtsp://192.168.90.112:554/profile2/" -c:v
> copy -c:a aac -max_muxing_queue_size 99999 -map 0 foo.mp4
> 
> 
> 
> I now need to take some of the parts and put them in a preset file. Because
> FFmpeg does not like my pcm_alaw audio codex. I had to use "-c:a aac" to
> replace the audio steam with a blank one. I also had to add the
> "-max_muxing_queue_size 99999" to prevent buffer issues.
> 
> 
> 
> My video is using the h.264 codex. Do I just need to make a file named
> h264.ffpreset, with the following lines:
> 
> 
> 
>                c:a=aac
> 
>                max_muxing_queue_size=99999
> 
> 

As far as I know the use of preset files has been deprecated.

I'd use a wrapper that takes the source and transport type arguments from your API and then specifies the additional settings on the actual ffmpeg command line.

> 
> 
> 
> Thanks,
> 
> 
> 
> Scotty.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> ffmpeg version N-91715-gd71dfc087b Copyright (c) 2000-2018 the FFmpeg
> developers
> 
>   built with gcc 8.2.1 (GCC) 20180813
> 
>   configuration: --enable-gpl --enable-version3 --enable-sdl2
> --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
> --enable-libbluray --enable-libfreetype --enable-libmp3lame
> --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-
> libopenjpeg
> --enable-libopus --enable-libshine --enable-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
> --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc
> --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom
> --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid
> --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2
> --enable-avisynth
> 
>   libavutil      56. 19.100 / 56. 19.100
> 
>   libavcodec     58. 27.100 / 58. 27.100
> 
>   libavformat    58. 17.103 / 58. 17.103
> 
>   libavdevice    58.  4.101 / 58.  4.101
> 
>   libavfilter     7. 26.100 /  7. 26.100
> 
>   libswscale      5.  2.100 /  5.  2.100
> 
>   libswresample   3.  2.100 /  3.  2.100
> 
>   libpostproc    55.  2.100 / 55.  2.100
> 
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