Re: [gentoo-user] OT: what audio file format / container to play on Android.

[Willie M]

On 07/01/2016 03:10 PM, Stroller wrote:
> I've only recently started using my Android device for playing audio.
>
> About once a week I listen to a podcast, which is usually an MP3 I've downloaded from NPR.org.
>
> On my laptop I copy these to Google Drive (big shout to net-misc/drive) and then I can access then via Drive on my Android phone.
>
> Google Drive on Android seems to play these audio files on a built-in player; its only controls are to skip forwards or backwards 30 seconds, but this is adequate for podcasts.
>
> I have here a BBC radio show that I downloaded a couple of weeks ago with net-misc/youtube-dl.
>
> When downloaded it saves as an .mp4 file. I have also tried renaming it to .m4a but, either way, Google Drive complains "unable to process this video".
>
> How do I need to process this audio to get it to play, please?
>
> I'd obviously prefer to keep the same audio stream, rather than transcoding it. I assume that the player can handle AAC (??), it just needs to be in another container.
>
> Thanks in advance for any suggestions,
>
> Stroller.
>
>
>
> Details:
>
>
> $ youtube-dl http://www.bbc.co.uk/programmes/b07fl5bh
> [bbc.co.uk] b07fl5bh: Downloading video page
> [bbc.co.uk] b07fl2qw: Downloading media selection XML
> [bbc.co.uk] b07fl2qw: Downloading m3u8 information
> [bbc.co.uk] b07fl2qw: Downloading m3u8 information
> [bbc.co.uk] b07fl2qw: Downloading m3u8 information
> [hlsnative] Downloading m3u8 manifest
> [hlsnative] Total fragments: 390
> [download] Destination: The Bronze Age Collapse, In Our Time - BBC Radio 4-b07fl2qw.mp4
> [download] 100% of 40.56MiB in 01:42
> [ffmpeg] Fixing malformated aac bitstream in "The Bronze Age Collapse, In Our Time - BBC Radio 4-b07fl2qw.mp4"
> $ file The\ Bronze\ Age\ Collapse\,\ In\ Our\ Time\ -\ BBC\ Radio\ 4-b07fl2qw.mp4
> The Bronze Age Collapse, In Our Time - BBC Radio 4-b07fl2qw.mp4: ISO Media, MP4 Base Media v1 [IS0 14496-12:2003]
> $ midentify The\ Bronze\ Age\ Collapse\,\ In\ Our\ Time\ -\ BBC\ Radio\ 4-b07fl2qw.mp4
> ID_AUDIO_ID=0
> ID_AID_0_LANG=eng
> ID_CLIP_INFO_NAME0=major_brand
> ID_CLIP_INFO_VALUE0=isom
> ID_CLIP_INFO_NAME1=minor_version
> ID_CLIP_INFO_VALUE1=512
> ID_CLIP_INFO_NAME2=compatible_brands
> ID_CLIP_INFO_VALUE2=isomiso2mp41
> ID_CLIP_INFO_NAME3=encoder
> ID_CLIP_INFO_VALUE3=Lavf56.25.101
> ID_CLIP_INFO_N=4
> ID_FILENAME=The\ Bronze\ Age\ Collapse,\ In\ Our\ Time\ -\ BBC\ Radio\ 4-b07fl2qw.mp4
> ID_DEMUXER=lavfpref
> ID_AUDIO_FORMAT=MP4A
> ID_AUDIO_BITRATE=128000
> ID_AUDIO_RATE=48000
> ID_AUDIO_NCH=2
> ID_START_TIME=0.00
> ID_LENGTH=2495.91
> ID_SEEKABLE=1
> ID_CHAPTERS=0
> ID_AUDIO_BITRATE=128000
> ID_AUDIO_RATE=48000
> ID_AUDIO_NCH=2
> ID_AUDIO_CODEC=ffaac
> ID_EXIT=EOF
> $
>
>

You can just have youtube-dl download just the audio of the youtube video.

youtube-dl -x --audio-format mp3 http://www.bbc.co.uk/programmes/b07fl5bh

You can also set other formats for the audio

"best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"

-- 

Willie Matthews
matthews.willie80@×××××.com