[FFmpeg-user] How to merge and map 1 video file with 4 audio files?

[Andrew Randrianasulu]

сб, 30 сент. 2023 г., 19:08 Media Mouth <communque at gmail.com>:

> How to merge and map 1 video file with 4 audio files?
>
> We've have 1 video file, 4 audio files, all same length.
> The video file is DNxHD36
> The audio tracks are all .wav
>
> The goal is to merge all 5 files in sync
>
> Based on https://ffmpeg.org/ffmpeg.html#Advanced-options I tried the
> following:
>
> ffmpeg \
> -i 'Video.mxf' \
> -i 'Audio1.wav' \
> -i 'Audio2.wav' \
> -i 'Audio3.wav' \
> -i 'Audio4.wav' \
> -c:v copy \
> -c:a pcm_s24le \
> -map 0:v:0 \
> -map_channel 1.0.0 OUTPUT_CH0 \
> -map_channel 2.0.0 OUTPUT_CH1 \
> -map_channel 3.0.0 OUTPUT_CH2 \
> -map_channel 4.0.0 OUTPUT_CH3 \
> '/Volumes/ANF_VFX/prjx531-Xfers/ANF_103_230908_Soft Lock_MixStage_test.mxf'
>
> Getting error
> [NULL @ 0x7f814601a200] Unable to find a suitable output format for
> 'OUTPUT_CH0'
> OUTPUT_CH0: Invalid argument
>


may be remove all OUTPUT_CHx lines so output will be clearly into one mxf
file?

>
> Also tried removing the extra 0 in the -map_channel lines,
>         e.g. -map_channel 1.0 OUTPUT_CH0 instead of
>                 -map_channel 1.0.0 OUTPUT_CH0
>
> Got error
> Syntax error, mapchan usage: [file.stream.channel|-1][:syncfile:syncstream]
>
>
>
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