|Title:||Audio issue (dbl speed) related to the ahi audio output|
|thematic||Channels: 1||20170109 23:21|
|(Okay I revisited the forum topic, and this is previously known by and large. But it's valid.)
I noticed this in some videos, so it occurred to me to check whether that is because they are single channel. It is a part of it:
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang und
VIDEO: [H264] 480x266 24bpp 25.000 fps 254.9 kbps (31.1 kbyte/s)
ok, preinit P96_OpenOSLibs done!
ok, preinit P96_GiveArg done!
ok, exit from preinit
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H.264)
Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders
AUDIO: 44100 Hz, 1 ch, s16be, 70.8 kbit/10.03% (ratio: 8848->88200)
Selected audio codec: [ffaac] afm: ffmpeg (FFmpeg AAC (MPEG-2/MPEG-4 Audio))
AHI: Using 0x30002 AudioID.
AHI: Using 10584 bytes per chunk and 330 Kb for buffer
AO: [ahi] 44100Hz 1ch s16be (2 bytes per sample)
Movie-Aspect is 1.80:1 - prescaling to correct movie aspect.
VO: [p96_pip] 480x266 => 480x266 Planar YV12 [fs]
Exiting... (End of file)
The following codecs are affected, at least: vorbis, wmav2, ac3, aac
As you can see, the 1-channel thing is reported correctly not just by the demuxer, but also the output driver.
Did tests with ffmpeg, vorbis was encoded with libvorbis. Matroska container and for the last two, MP4 containers were used.