GNOME Bugzilla – Bug 450535
[faad] multichannel AAC downsampling seems invalid.
Last modified: 2008-05-06 09:24:59 UTC
Please describe the problem: When totem plays multichannel AAC sample with 2 or 4channel speaker, I could hear sound or voice from unexpected direction. and some of voices couldn't hear. So I searched multichannel AAC sample for speaker testing, and found there is a problem related downsampling multichannel AAC. Steps to reproduce: 1. download multichannel AAC sample from http://82.10.220.174/51_Test_Encodes/AV_Setup_Tests/AAC-HE_6Ch_'Speaker_Test'.7z 2. play audio sample with totem Actual results: Some channel voices can't hear, or can hear from unexpected direction. Expected results: Each channel voices are heard from properly speakers. Does this happen every time? Yes. Other information:
FYI, I test VLC player with same sample, and it works properly.
Created attachment 90963 [details] [review] channel arrange patch This is a patch for faad channel arrange. I test 2ch speaker and 4 ch speaker. But there are some issue yet. 1) When speaker-out is 2 channel, front-left and front-right out is good, but center and rear can't hear. (maybe audioconvert element issue?) 2) Not yet tested for side speaker
Created attachment 90964 [details] [review] channel arrange patch This is a patch for faad channel arrange. I test 2ch speaker and 4 ch speaker. But there are some issue yet. 1) When speaker-out is 2 channel, front-left and front-right out is good, but center and rear can't hear. (maybe audioconvert element issue?) 2) Not yet tested for side speaker
This looks more like a bug in faad as it doesn't give the correct positions for the channels. Closing as NOTGNOME, please reopen if you disagree :)