[FFmpeg-user] [ffmpeg-user] Transcode to high bitrate of Dolby TrueHD or DTS-HD Master

[Xuebing Wang]

On Mon, 2015-01-05 at 22:20 +0100, Moritz Barsnick wrote:
> On Tue, Jan 06, 2015 at 04:38:47 +0800, Xuebing Wang wrote:
> > >> bitrate audio (e.g. max 24.5 Mbps for 5.1 channels, 192k sampling
> > >> rate, 24 bits, 5.1 channels) (i: still attain the video stream, ii,
> > >> audio only)?
> > Thanks Andy. Any idea what is the command line to resample TrueHD from 
> > like 640kbps to HBR (>6.144Mbps)?
> 
> I think you are confusing the terms of resampling and re-encoding. I
> think you mean changing the bit rate (by re-encoding).
> 
> You can indeed resample from 48k to 192k. But why would you want to
> increase the bit rate from the original TrueHD stream? The quality
> won't increase from this.
> 
> Compatibility?

Thanks. I do not care much about the quality. I am trying to verify
streaming HBR (high bit rate) audio via HDMI (aka HDMI passthrough, HBR
audio streams need to go through ff_spdif_muxer, implemented in
libavformat/spdifenc.c).


> 
> FWIW, the audio sample rate is controlled by "-ar", the bit rate by
> "-b:a".
> 
> Confused,
> Moritz
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