[FFmpeg-user] Basic ffmpeg user - issues converting

Carl Eugen Hoyos ceffmpeg at gmail.com
Sun Sep 30 14:56:11 EEST 2018

2018-09-30 10:51 GMT+02:00, Kassim Massop <massop at gmail.com>:
> Hi there community,
> I have recently discovered ffmpeg and am trying to use it to convert &
> compress my raw footage from an Atomos device.
> When using the most basic command (ffmpeg -i source.mov output.mov) I get
> the below error in "basic command"
> After some googling I found using the copy command can fix this so I used
> the following command (ffmpeg -i source.mov -acodec copy output.mov) which
> converted successfully but the output video file is unplayable in any video
> player

> (error from VLC - Codec not supported:VLC could not decode the
> format "aivx" (No description for this codec)).

This is a surprising error in this context:
Please provide "ffmpeg -i" console output for your output file.

> What am I doing wrong here? Also what would be the best command to run to
> reduce filesize and keep the quality as high as possible for 1080p/60 &
> 4k/60 respectivley

You can test with small values for crf.

> (whilst keeping the 10 audio channels)?

I wonder how you are going to play back 10 channel audio?
Does vlc support your input file / the audio of your input file?

Carl Eugen

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