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:
or maybe 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%"
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 ?"%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%"
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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.