Posts: 59
Threads: 14
Joined: Jul 2017
I am just feeding back an observation.. its beyond minor but thought you might like to fix it at some point.
I have a bunch of files that according to MediaInfo have the following Audio settings:
ID : 2
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : A_AAC-2
Duration : 30 min 39 s
Bit rate : 317 kb/s
Channel(s) : 6 channels
Channel layout : C L R Ls Rs LFE
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 69.6 MiB (24%)
Language : English
Default : Yes
Forced : No
317kbs Bitrate is an odd number for sure, but thats what it is.... But according to Hybrid the Bitrate is 128kbs.
I have sent you logs from when I open this file.. If you want the file in question, just ask.
Jon
Posts: 10.598
Threads: 57
Joined: May 2017
FFmpeg reported:
ID_DEMUXER=mkv
ID_VIDEO_FORMAT=avc1
ID_VIDEO_BITRATE=0
ID_VIDEO_WIDTH=1280
ID_VIDEO_HEIGHT=720
ID_VIDEO_FPS=59.940
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=MP4A
ID_AUDIO_BITRATE=0
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=6
ID_START_TIME=0.00
ID_LENGTH=1839.21
ID_SEEKABLE=1
ID_CHAPTERS=3
==========================================================================
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
dec_audio: Allocating 1536000 + 131072 = 1667072 bytes for output buffer.
FFmpeg's libavcodec audio codec
INFO: libavcodec "aac" init OK!
AUDIO: 48000 Hz, 6 ch, floatle, 128.0 kbit/1.39% (ratio: 16000->1152000)
Mplayer reports:
AUDIO: 48000 Hz, 6 ch, floatle, 128.0 kbit/1.39% (ratio: 16000->1152000)
ID_AUDIO_BITRATE=128000
ID_AUDIO_RATE=48000
ID_AUDIO_NCH=6
MediaInfo reports:
Audio
Count : 280
Count of stream of this kind : 1
Kind of stream : Audio
Kind of stream : Audio
Stream identifier : 0
StreamOrder : 1
ID : 2
ID : 2
Unique ID : 7351533584388041878
Format : AAC
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Commercial name : AAC
Format_AdditionalFeatures : LC
Codec ID : A_AAC-2
Duration : 1839210.000000
Duration : 30 min 39 s
Duration : 30 min 39 s 210 ms
Duration : 30 min 39 s
Duration : 00:30:39.210
Duration : 00:30:34:15
Duration : 00:30:39.210 (00:30:34:15)
Bit rate : 317375
Bit rate : 317 kb/s
Channel(s) : 6
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Channel positions : 3/2/0.1
Channel layout : C L R Ls Rs LFE
Samples per frame : 1024
Sampling rate : 48000
Sampling rate : 48.0 kHz
Samples count : 88282080
Frame rate : 46.875
Frame rate : 46.875 FPS (1024 SPF)
Frame count : 86213
Compression mode : Lossy
Compression mode : Lossy
Delay : 0
Delay : 00:00:00.000
Delay, origin : Container
Delay, origin : Container
Delay relative to video : 0
Delay relative to video : 00:00:00.000
Stream size : 72964936
Stream size : 69.6 MiB (24%)
Stream size : 70 MiB
Stream size : 70 MiB
Stream size : 69.6 MiB
Stream size : 69.58 MiB
Stream size : 69.6 MiB (24%)
Proportion of this stream : 0.24008
Language : en
Language : English
Language : English
Language : en
Language : eng
Language : en
Default : Yes
Default : Yes
Forced : No
Hybrid simply doesn't change the bit rate since it already had one.
I can probably write a workaround for it, would need a short sample to reproduce and fix the issue.
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
Posts: 59
Threads: 14
Joined: Jul 2017
Sample sent by email
I "cut" a 2 second clip and compressed the video right down to make it small enough to mail.. But Audio is untouched and clearly shows the issue.
Jon
Posts: 10.598
Threads: 57
Joined: May 2017
Wrote a 'blind' workaround for it yesterday, which does seem to work.
-> try the dev version I send you a link to via PM
Cu Selur
----
Dev versions are in the 'experimental'-folder of my GoogleDrive, which is linked on the download page.
