[FFmpeg-devel] [RFC] ac3enc: how do I force ac3 encodertooutput frames with the same size?

Michael Niedermayer michaelni at gmx.at
Tue Dec 25 20:04:07 CET 2012


On Tue, Dec 25, 2012 at 06:41:03PM +0100, Piotr Bandurski wrote:
> Hi,
> 
> > if you want 280 then you need 16078.125 bits per second
> > 
> > you could try
> > 16078
> 
> coded_frame_size: 279
> 
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 278
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> 
> > 16079
> 
> coded_frame_size: 280
> 
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 278
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 280
> 
> > 18375
> 
> coded_frame_size: 320
> 
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 348
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 348
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 348
> [ac3 @ 018ecb98] hdr.bitstream_id: 10
> [ac3 @ 018ecb98] hdr.frame_size: 348

i assume none of these plays with the real decoder ?

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I know you won't believe me, but the highest form of Human Excellence is
to question oneself and others. -- Socrates
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