#2686: Native AAC encoder collapses at high bitrates on some samples
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Reporter: Kamedo2 | Owner:
Type: defect | Status: open
Priority: normal | Component: avcodec
Version: git-master | Resolution:
Keywords: aac | Blocked By:
regression | Reproduced by developer: 1
Blocking: |
Analyzed by developer: 0 |
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Comment (by klaussfreire):
LOL, sorry, the VBR condition is backwards. An old idiocy of mine, I
always reverse if conditions. Kinda like coding dyslexia.
It should be
{{{
#define _AAC_CUTOFF(bit_rate,channels,sample_rate) (bit_rate ?
FFMIN3(FFMIN3( \
bit_rate/channels, \
3000 + bit_rate/channels/2, \
12000 + bit_rate/channels/8), \
20000, \
sample_rate / 2): (sample_rate / 2))
#define AAC_CUTOFF(s) ( \
(s->flags & CODEC_FLAG_QSCALE) \
? _AAC_CUTOFF((int)(s->bit_rate * (s->global_quality ?
s->global_quality : 120) / 120.0), 2, s->sample_rate) \
: _AAC_CUTOFF(s->bit_rate, s->channels, s->sample_rate) \
)
}}}
Though I'm getting some weird results with very low quality settings.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:62>
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