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Hey,
I have an audio and video file i want to mux together into a MKV container. files are video.mkv and audio.m4a. Both of these files have bitrate in the metadata but when i mux them using this command into a mkv. `ffmpeg -i video.mkv -i audio.m4a -map 0 -map 1 -c copy output.mkv` there is no bitrate for video or audio but there is an overall bitrate.
Now if i mux them into a mp4 container the bitrate meta data are there. I have tired using -map_metadata 1 which i seen posted would transfer the metadata but doesn't.
video mediainfo
audio mediainfoCode:General Unique ID : 244809118920359629491762342051475808478 (0xB82C857286A6134DDE6AF7BE9A7AE0DE) Complete name : v1.mkv Format : Matroska Format version : Version 4 File size : 427 MiB Duration : 10 min 0 s Overall bit rate : 5 973 kb/s Writing application : Lavf58.45.100 Writing library : Lavf58.45.100 ErrorDetectionType : Per level 1 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Format settings, GOP : M=3, N=50 Codec ID : V_MPEG4/ISO/AVC Duration : 10 min 0 s Bit rate : 5 854 kb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.113 Stream size : 419 MiB (98%) Default : Yes Forced : No Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709
MKV output media info after running `ffmpeg -i v1.mkv -i v1.m4a -map 0 -map 1 -c copy -map_metadata 1 output.mkv`Code:General Complete name : v1.m4a Format : MPEG-4 Format profile : Apple audio with iTunes info Codec ID : M4A (M4A /isom/iso2) File size : 9.26 MiB Duration : 10 min 0 s Overall bit rate mode : Constant Overall bit rate : 130 kb/s Writing application : Lavf58.45.100 Audio ID : 1 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 10 min 0 s Bit rate mode : Constant Bit rate : 128 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 9.16 MiB (99%) Language : English Default : Yes Alternate group : 1
Code:General Unique ID : 325517703584640152619819065611482253966 (0xF4E46DE50B3D88B35AB2D782F1EF4A8E) Complete name : output.mkv Format : Matroska Format version : Version 4 File size : 437 MiB Duration : 10 min 0 s Overall bit rate : 6 103 kb/s Writing application : Lavf58.45.100 Writing library : Lavf58.45.100 ErrorDetectionType : Per level 1 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Format settings, GOP : M=3, N=50 Codec ID : V_MPEG4/ISO/AVC Duration : 10 min 0 s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Default : Yes Forced : No Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : A_AAC-2 Duration : 10 min 0 s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Language : English Default : Yes Forced : No
MP4 output media info after running `ffmpeg -i v1.mkv -i v1.m4a -map 0 -map 1 -c copy -map_metadata 1 output.mp4`
Code:General Complete name : output.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 437 MiB Duration : 10 min 0 s Overall bit rate : 6 104 kb/s Writing application : Lavf58.45.100 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High@L4 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Format settings, GOP : M=3, N=50 Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 10 min 0 s Bit rate : 5 971 kb/s Width : 1 920 pixels Height : 1 080 pixels Display aspect ratio : 16:9 Frame rate mode : Constant Frame rate : 25.000 FPS Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.115 Stream size : 427 MiB (98%) Color range : Limited Color primaries : BT.709 Transfer characteristics : BT.709 Matrix coefficients : BT.709 Codec configuration box : avcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 10 min 0 s Bit rate mode : Constant Bit rate : 128 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 9.16 MiB (2%) Language : English Default : Yes Alternate group : 1
version of ffmpeg
Code:ffmpeg version 4.3.6-0+deb11u1 Copyright (c) 2000-2023 the FFmpeg developers built with gcc 10 (Debian 10.2.1-6) configuration: --prefix=/usr --extra-version=0+deb11u1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-pocketsphinx --enable-libmfx --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared libavutil 56. 51.100 / 56. 51.100 libavcodec 58. 91.100 / 58. 91.100 libavformat 58. 45.100 / 58. 45.100 libavdevice 58. 10.100 / 58. 10.100 libavfilter 7. 85.100 / 7. 85.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 7.100 / 5. 7.100 libswresample 3. 7.100 / 3. 7.100 libpostproc 55. 7.100 / 55. 7.100
Anyone have any idea how to get the meta data from the original files into the mux MKV file?
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Last edited by grimeire; 18th Sep 2023 at 10:48.
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nope still the sameOriginally Posted by ProWo
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Then add
-movflags use_metadata_tags -
Originally Posted by ProWo
tired both these and still the same.
ffmpeg -i v1.mkv -i v1.m4a -map 0 -map 1 -c copy -map_metadata 0 -movflags use_metadata_tags output.mkv
ffmpeg -i v1.mkv -i v1.m4a -map 0 -map 1 -c copy -movflags use_metadata_tags output.mkv
Does it matter where the options are passed in the command? -
Your commandline is fine.
The problem is that your video stream does not contain bitrate info.
With mp4 this is calculated and added by the mp4 muxer.
The mkv muxer takes the tags of the individual streams and that is missing this info. -
Mux to mp4 first, then mux from the mp4 to mkv?
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Could be caused by the variable bitrate of the aac audio stream...
Try to recode the audiostream to ac3 2ch 256k and then remux this ac3 stream with your mkv videostream to mkv.
Then check, if both bitrates (audio and video) are shown in mediainfo.Last edited by ProWo; 18th Sep 2023 at 12:29.
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Thank you I appreciate the helpOriginally Posted by jagabo
so i tired that and still get the same result. the mux mp4 does have the bitrate data but when i convert it to mkv it doesnt.
here is the command i used. Also tired it without '-map_metadata 0 -movflags use_metadata_tags'
ffmpeg -i output.mp4 -map 0 -c copy -map_metadata 0 -movflags use_metadata_tags output.mkv
I dont really want to convert audio as it just adding additional steps for no real benefit.Last edited by grimeire; 18th Sep 2023 at 14:59.
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Not for real, just as test...Originally Posted by grimeire
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Why not just drag and drop the audio and video files into mkvtoolnix? Run mkvtoolnix-gui.exe, drag and drop the audio and video files into the source files box, and then click the Start Multiplexing button. done!
SONY 75" Full array 200Hz LED TV, Yamaha A1070 amp, Zidoo UHD3000, BeyonWiz PVR V2 (Enigma2 clone), Chromecast, Windows 11 Professional, QNAP NAS TS851 -
This is a headless machine so no UI.Originally Posted by netmask56
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Originally Posted by ProWo
why 256k the bit rate from mediainfo says its 128K constant and not variable.
any suggestion on the command for this? dont ever really ever convert audio so open to suggestions -
-c:a ac3 - b:a 256kOriginally Posted by grimeire
This should be constant bitrate. -
mkvmerge CLIOriginally Posted by grimeire
This is a headless machine so no UI.Originally Posted by netmask56
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thanks mkvmerge worked a dreamOriginally Posted by poisondeathray
mkvmerge CLIOriginally Posted by grimeire
This is a headless machine so no UI.Originally Posted by netmask56
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