[FFmpeg-trac] #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples
FFmpeg
trac at avcodec.org
Tue Oct 13 20:14:13 CEST 2015
#2686: Native AAC encoder collapses at high bitrates on some samples
-------------------------------------+-------------------------------------
Reporter: Kamedo2 | Owner:
Type: defect | klaussfreire
Priority: normal | Status: open
Version: git-master | Component: avcodec
Keywords: aac | Resolution:
regression | Blocked By:
Blocking: | Reproduced by developer: 1
Analyzed by developer: 0 |
-------------------------------------+-------------------------------------
Comment (by Kamedo2):
The combinations of these options below are now extensively tested. Rate,
speed, and error codes are monitored.
{{{
["-aac_coder faac", "-aac_coder fast", "-aac_coder twoloop"],
["-aac_ms 0","-aac_ms 1"],
["-aac_is 0","-aac_is 1"],
["-aac_tns 0","-aac_tns 1"],
["-profile:a aac_main -aac_pred 1 -aac_pns 0","-profile:a aac_low -aac_pns
1","-profile:a mpeg2_aac_low"],
["-ar 8000", "-ar 44100", "-ar 48000", "-ar 96000"],
["-b:a 16k", "-b:a 96k", "-b:a 128k", "-q:a 1", "-b:a 240k", "-b:a 320k",
"-b:a 512k", "-q:a 0.25"]
}}}
(2304 combinations total)
{{{--aac_coder anmr}}} seems to be unstable and prone to crashing.
{{{-aac_coder faac}}} and {{{-aac_coder fast}}} often ignore bitrate
blatantly.
atomnuker: Yes, I am a member of the Fueru Wakame, the audio video
encoding community on Slack. Glad to hear that you understand Japanese to
that point.
--
Ticket URL: <https://trac.ffmpeg.org/ticket/2686#comment:431>
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