Ubuntu
mplayer package

MPlayer always downsamples AC-3 streams to two channels in Gutsy

Bug #140476 reported by Pizuz
4
Affects Status Importance Assigned to Milestone
mplayer (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Binary package hint: mplayer

Whenever playing a video with AC-3 surround sound on MPlayer, I only get the left and right channels. This happens solely with AC-3 audio while other codecs that support 5.1 encoding are completely unaffected (the famous 6_channel_id.wav targets all my speakers, but switches the RearLeftRight/CenterLFE channels). When opening a video with AC-3 encoded sound, I get the following:

Forced audio codec: mad
Opening audio decoder: [liba52] AC3 decoding with liba52
Using SSE optimized IMDCT transform
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 256.0 kbit/16.67% (ratio: 32000->192000)
Selected audio codec: [a52] afm: liba52 (AC3-liba52)

Note the "AUDIO..." line. When playing other 5.1 encoded media it says:

Forced audio codec: mad
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 44100 Hz, 6 ch, s16le, 4233.6 kbit/100.00% (ratio: 529200->529200)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)

I know for sure that MPlayer played AC-3 streams correctly in Feisty.

I use an Intel 82801DB(ICH4) on-board AC'97 chip.

Revision history for this message
Mario Limonciello (superm1) wrote :

Were you attempting to use pass thru audio to a receiver? If so, you will be needing additional switches to handle this.

Changed in mplayer:
status: New → Incomplete
Revision history for this message
Pizuz (florian-fahr) wrote :

No, my soundcard has those capabilities itself. No need for a receiver.

Revision history for this message
Andreas Moog (ampelbein) wrote : Old standing report

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Thank you for taking the time to report this bug and helping to make
Ubuntu better. You reported this bug a while ago and there hasn't been
any activity in it recently. We were wondering is this still an issue
for you? Can you try with latest Ubuntu release? Thanks in advance.

 status incomplete
 subscribe

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Revision history for this message
Andreas Moog (ampelbein) wrote :

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!

Changed in mplayer:
status: Incomplete → Invalid
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