advice - latest (best) audio codec to use in MP4 files for chromecast

[hydra3333]

Hello. I'm updating some old batch files which use ffmpeg to do transcoding in various ways, and seek advice about which is the latest "best" audio format to use in MP4 files intended for chromcasting from a home chromecast server.

For a long time I used MP3 because it was compatible, like this:

"%NVENCFFMPEGEXE%" -i "%videofile%" -i "%audiofilenormalized%" -map_metadata -1 -map 0:v -map 1:a -c:v h264 -preset fast -profile:v high -level 4.1 -crf %crf% -coder 0 -c:a libmp3lame -ab %audiobitrate% -movflags +faststart -y "%fOUTPUT%"

or maybe this

"%NVENCFFMPEGEXE%" -i "%videofile%" -i "%audiofilenormalized%" -map_metadata -1 -map 0:v -map 1:a -filter:v unsharp -c:v h264_nvenc -preset hq -rc:v constqp -global_quality 20 -profile:v high -level 4.1 -pixel_format yuv420p -movflags +faststart -c:a libmp3lame -ab %audiobitrate% -y "%fOUTPUT%"

Once upon a time aac like this "c:a libvo_aacenc" was said to produce very low quality output in ffmpeg, but now I'm wondering what it's like now, and what the recommended codec would be for use with a chromecast device ?

Thanks

[johnmeyer]

I think you'll find a whole lot more information about Chromecast audio here:

*Official* Google Chromecast AUDIO owners thread (AVS Forum)

I don't use the product, so I don't have any other information to provide.