[FFmpeg-user] the trim filter

[Paul B Mahol]

On Fri, Jul 5, 2024 at 2:09 AM Mark Filipak <markfilipak.imdb at gmail.com>
wrote:

> On 04/07/2024 17.12, Paul B Mahol wrote:
> > Its in documentation: asetpts=N/SR/TB, assuming everything starts from 0,
> > so add it after each atrim.
>
> For both video & audio,
>    time_base=1/90000
>    start_pts=1048560
>
> So, there are 'silent' audio samples starting with the first video frame.
> I'm dropping 20.062
> seconds of video (i.e., 481 frames). I really don't know how I could
> rewrite audio PTSes to make
> that 20.062 seconds of audio to go away. I really think that's impossible.
> They have to be dropped,
> just as I am dropping the 481 video frames.
>
> Here's my trim commands for the first segment:
>
>
> trim=start_frame=481:end_frame=134047,atrim=start_sample=962962:end_sample=268360093
>
> Here's the interesting terminal output (slightly beautified):
>
> [Parsed_trim_1 @ 0000000000620040]
>   Media type mismatch between the 'Parsed_trim_1' filter output pad 0
> (video) and the
> 'Parsed_atrim_2' filter input pad 0 (audio)
>
> [AVFilterGraph @ 000000000061c7c0] Error linking filters
>
> Failed to set value
>   'split=2[i5][i6],
>   [i5]trim=start_frame=481:end_frame=134047,
> atrim=start_sample=962962:end_sample=268360092[o5],
>   [i6]trim=start_frame=138745:end_frame=246719[o6],
>   [o5][o6]concat=n=2'
> for option 'filter_complex': Invalid argument
> Error parsing global options: Invalid argument
>

This is exact proof that your FFmpeg CLI skills are bellow flat absolute
zero. I'm wasting my and everyone else time replying to your questions.


>
>
> Following is the entire terminal output:
> ffmpeg -i g:\00305+00306+00307+00308.m2ts -bsf:a
> noise=drop='lt(pts\,1805580)' -filter_complex
> "split=2[i5][i6],[i5]trim=start_frame=481:end_frame=134047,atrim=start_sample=962962:end_sample=268360092[o5],[i6]trim=start_frame=138745:end_frame=246719[o6],[o5][o6]concat=n=2,"
>
>   -c:v libx265 -x265-params crf=16 -c:a dts -strict -2 -sn
>   -start_at_zero e:\00305+00306+00307+00308.mp4
> ffmpeg version 2024-05-20-git-127ded5078-full_build-www.gyan.dev
> Copyright (c) 2000-2024 the FFmpeg
> developers
>    built with gcc 13.2.0 (Rev5, Built by MSYS2 project)
>    configuration: --enable-gpl --enable-version3 --enable-static
> --disable-w32threads
> --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls
> --enable-libxml2
> --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib
> --enable-librist
> --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth
> --enable-libbluray
> --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption
> --enable-libdav1d
> --enable-libdavs2 --enable-libuavs3d --enable-libxevd --enable-libzvbi
> --enable-librav1e
> --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265
> --enable-libxavs2
> --enable-libxeve --enable-libxvid --enable-libaom --enable-libjxl
> --enable-libopenjpeg
> --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r
> --enable-libfreetype
> --enable-libfribidi --enable-libharfbuzz --enable-liblensfun
> --enable-libvidstab --enable-libvmaf
> --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
> --enable-dxva2 --enable-d3d11va
> --enable-d3d12va --enable-ffnvcodec --enable-libvpl --enable-nvdec
> --enable-nvenc --enable-vaapi
> --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl
> --enable-libcdio
> --enable-libgme --enable-libmodplug --enable-libopenmpt
> --enable-libopencore-amrwb
> --enable-libmp3lame --enable-libshine --enable-libtheora
> --enable-libtwolame --enable-libvo-amrwbenc
> --enable-libcodec2 --enable-libilbc --enable-libgsm
> --enable-libopencore-amrnb --enable-libopus
> --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b
> --enable-libflite
> --enable-libmysofa --enable-librubberband --enable-libsoxr
> --enable-chromaprint
>    libavutil      59. 19.100 / 59. 19.100
>    libavcodec     61.  5.104 / 61.  5.104
>    libavformat    61.  3.103 / 61.  3.103
>    libavdevice    61.  2.100 / 61.  2.100
>    libavfilter    10.  2.102 / 10.  2.102
>    libswscale      8.  2.100 /  8.  2.100
>    libswresample   5.  2.100 /  5.  2.100
>    libpostproc    58.  2.100 / 58.  2.100
> [Parsed_trim_1 @ 0000000000620040] Media type mismatch between the
> 'Parsed_trim_1' filter output pad
> 0 (video) and the 'Parsed_atrim_2' filter input pad 0 (audio)
> [AVFilterGraph @ 000000000061c7c0] Error linking filters
> Failed to set value
>
> 'split=2[i5][i6],[i5]trim=start_frame=481:end_frame=134047,atrim=start_sample=962962:end_sample=268360092[o5],[i6]trim=start_frame=138745:end_frame=
> 246719[o6],[o5][o6]concat=n=2,' for option 'filter_complex': Invalid
> argument
> Error parsing global options: Invalid argument
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