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Video with 5.1 sound -> mono mix modes = garbage Issue Tools
issueid=2443 05-07-2010 12:48 PM
Human being with feelings
Video with 5.1 sound -> mono mix modes = garbage

REAPER 3.52pre1


This video

Code:
Length: 1:39:43.039
Video: 1280x688@23.98fps, Aspect=1.00, Decoding format=RGB
Audio: 48000Hz 6ch 16bps

Using FFmpeg DLL decoder v52.61.0 (--enable-shared --disable-static --enable-memalign-hack --cross-prefix=i686-mingw32- --cc=ccache-i686-mingw32-gcc --arch=i686 --target-os=mingw32 --enable-runtime-cpudetect --enable-avisynth --enable-gpl --enable-version3 --enable-bzlib --enable-libgsm --enable-libfaad --enable-pthreads --enable-libvorbis --enable-libtheora --enable-libspeex --enable-libmp3lame --enable-libopenjpeg --enable-libxvid --enable-libschroedinger --enable-libx264 --enable-libopencore_amrwb --enable-libopencore_amrnb)
Video: h264, yuv420p, 1280x688 [PAR 1:1 DAR 80:43], 1849 kb/s
Audio: aac, 48000 Hz, 5.1, s16, 283 kb/s
Code:
General
Format                           : MPEG-4
Format profile                   : Base Media
Codec ID                         : isom
File size                        : 1.49 GiB
Duration                         : 1h 39mn
Overall bit rate                 : 2 136 Kbps

Video
ID                               : 1
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : High@L4.1
Format settings, CABAC           : Yes
Format settings, ReFrames        : 8 frames
Codec ID                         : avc1
Codec ID/Info                    : Advanced Video Coding
Duration                         : 1h 39mn
Bit rate mode                    : Variable
Bit rate                         : 1 850 Kbps
Maximum bit rate                 : 8 704 Kbps
Width                            : 1 280 pixels
Height                           : 688 pixels
Display aspect ratio             : 1.860
Frame rate mode                  : Constant
Frame rate                       : 23.976 fps
Resolution                       : 8 bits
Colorimetry                      : 4:2:0
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.088
Stream size                      : 1.29 GiB (87%)
Writing library                  : x264 core 80 r1376M 3feaec2
Encoding settings                : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x113 / me=umh / subme=9 / psy=1 / psy_rd=1.0:1.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-4 / threads=3 / sliced_threads=0 / slices=4 / nr=0 / decimate=1 / mbaff=0 / constrained_intra=0 / bframes=4 / b_pyramid=0 / b_adapt=2 / b_bias=0 / direct=1 / wpredb=1 / wpredp=2 / keyint=24 / keyint_min=2 / scenecut=40 / rc_lookahead=24 / rc=2pass / mbtree=1 / bitrate=1850 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / vbv_maxrate=40000 / vbv_bufsize=30000 / ip_ratio=1.40 / aq=1:1.00

Audio
ID                               : 2
Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : No
Codec ID                         : 40
Duration                         : 1h 39mn
Bit rate mode                    : Variable
Bit rate                         : 288 Kbps
Maximum bit rate                 : 354 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Stream size                      : 202 MiB (13%)

gives me just garbage audio output when setting the item to

Mono (Downmix)
Mono (Left)
Mono (Right)

output. Sound becomes crackling and full of digital artefacts.


FIXED (5.11pre15)
Issue Details
Issue Type Closed Issue
Project Deprecated REAPER issue tracker
Category Audio recording and playback
Status Fixed
Priority 8
Affected Version 3.51
Closed Version 5.11
Yes votes 0
No votes 0
Assigned Users (none)
Tags (none)

12-20-2015 07:35 PM
Human being with feelings
 
FIXED (5.11pre15)
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