Hi all, wondering if you can help me? I want to tell ffmpeg not to "write a CRC32 element inside every Level 1 element". I entered "ffmpeg -h muxer=matroska" in the command line and i see the option. I just don't know what to enter to disable it. I tried "ffmpeg -write_crc32 false" but got back "Trailing options were found on the commandline." anybody know the correct procedure?
Microsoft Windows [Version 10.0.19041.804]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\WINDOWS\system32>ffmpeg -h muxer=matroska
ffmpeg version 3.4 Copyright (c) 2000-2017 the FFmpeg developers
built with gcc 7.2.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --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-cuda --enable-cuvid --enable-d3d11va --enable-nvenc --enable-dxva2 --enable-avisynth --enable-libmfx
libavutil 55. 78.100 / 55. 78.100
libavcodec 57.107.100 / 57.107.100
libavformat 57. 83.100 / 57. 83.100
libavdevice 57. 10.100 / 57. 10.100
libavfilter 6.107.100 / 6.107.100
libswscale 4. 8.100 / 4. 8.100
libswresample 2. 9.100 / 2. 9.100
libpostproc 54. 7.100 / 54. 7.100
Muxer matroska [Matroska]:
Common extensions: mkv.
Mime type: video/x-matroska.
Default video codec: h264.
Default audio codec: vorbis.
Default subtitle codec: ass.
matroska muxer AVOptions:
-reserve_index_space <int> E....... Reserve a given amount of space (in bytes) at the beginning of the file for the index (cues). (from 0 to INT_MAX) (default 0)
-cluster_size_limit <int> E....... Store at most the provided amount of bytes in a cluster. (from -1 to INT_MAX) (default -1)
-cluster_time_limit <int64> E....... Store at most the provided number of milliseconds in a cluster. (from -1 to I64_MAX) (default -1)
-dash <boolean> E....... Create a WebM file conforming to WebM DASH specification (default false)
-dash_track_number <int> E....... Track number for the DASH stream (from 0 to 127) (default 1)
-live <boolean> E....... Write files assuming it is a live stream. (default false)
-allow_raw_vfw <boolean> E....... allow RAW VFW mode (default false)
-write_crc32 <boolean> E....... write a CRC32 element inside every Level 1 element (default true)
C:\WINDOWS\system32>
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