Date: Tue, 8 Dec 2009 19:52:57 +0000 From: Tom Evans <tevans.uk@googlemail.com> To: freebsd-multimedia@freebsd.org Cc: mav@freebsd.org Subject: Re: mplayer SVN plays video too fast on FreeBSD Message-ID: <2e027be00912081152k328603eej194985d0e6a033cd@mail.gmail.com> In-Reply-To: <2e027be00912081129k1df5bf05g7e9b2fd2804674f1@mail.gmail.com> References: <2e027be00912070613y5b3c4841tcd4d9ff58e1db330@mail.gmail.com> <2e027be00912071114t6a69b0a5vfdefea06e6ea9273@mail.gmail.com> <1260285252.2315.280.camel@balrog.2hip.net> <2e027be00912080744u5c085de0v92a546dbe3e449b4@mail.gmail.com> <2e027be00912081129k1df5bf05g7e9b2fd2804674f1@mail.gmail.com>
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On Tue, Dec 8, 2009 at 7:29 PM, Tom Evans <tevans.uk@googlemail.com> wrote: > On Tue, Dec 8, 2009 at 3:44 PM, Tom Evans <tevans.uk@googlemail.com> wrote: >> On Tue, Dec 8, 2009 at 3:14 PM, Robert Noland <rnoland@freebsd.org> wrote: >>> On Mon, 2009-12-07 at 19:14 +0000, Tom Evans wrote: >>>> Hi all >>>> >>>> I sent this to the mplayer mailing list earlier today, without >>>> thinking that probably someone on multimedia@ has tried to compile >>>> mplayer from svn. Has anyone succesfully managed to do it? - and get a >>>> working player out of it! >>> >>> I haven't tried mplayer from SVN, but the video playing too fast issue >>> is your audio codec. mplayer (and gstreamer, iirc) seem to set the >>> frame rate based on the audio. Generally, what I have seen is that >>> people with ATI/AMD (radeon) video cards with HDMI ports end up with the >>> HDMI port as dsp0. If you aren't running the radeonhd driver with the >>> AUDIO option set, the codec isn't initialized properly and so the video >>> plays too fast. To correct this issue, usually all you need to do is >>> set the sysctl hw.snd.default_unit to the correct pcm device. Basically, >>> if you have the following: >>> >>> balrog% cat /dev/sndstat >>> FreeBSD Audio Driver (newpcm: 64bit 2009061500/amd64) >>> Installed devices: >>> pcm0: <HDA ATI R6xx HDMI PCM #0 HDMI> at cad 0 nid 1 on hdac0 kld >>> snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex) >>> pcm1: <HDA Analog Devices AD1989B PCM #0 Analog> at cad 0 nid 1 on hdac1 >>> kld snd_hda [MPSAFE] (1p:4v/1r:2v channels duplex default) >>> pcm2: <HDA Analog Devices AD1989B PCM #1 Analog> at cad 0 nid 1 on hdac1 >>> kld snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex) >>> pcm3: <HDA Analog Devices AD1989B PCM #2 Digital> at cad 0 nid 1 on >>> hdac1 kld snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex) >>> pcm4: <HDA Analog Devices AD1989B PCM #3 Digital> at cad 0 nid 1 on >>> hdac1 kld snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex) >>> >>> Setting "sysctl hw.snd.default_unit=1" will choose the primary analog >>> pcm for audio output and mplayer will work fine. >>> >>> robert. >>> >> >> Thanks Robert, the mplayer list also said that mplayer syncs to audio, >> so I've got a few things to check there tonight :) >> >> I'm not using radeonhd or hdmi, I have an amplifier connected to the >> onboard snd_hda via spdif, and use spdif pass through if available on >> the source. I already specify hw.snd.default_unit=2, since that is >> seemingly the correct device: >> >> FreeBSD Audio Driver (newpcm: 64bit 2009061500/amd64) >> Installed devices: >> pcm0: <HDA VIA VT1708S_0 PCM #0 Analog> at cad 0 nid 1 on hdac0 kld >> snd_hda [MPSAFE] (1p:1v/1r:1v channels duplex) >> pcm1: <HDA VIA VT1708S_0 PCM #1 Digital> at cad 0 nid 1 on hdac0 kld >> snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex) >> pcm2: <HDA VIA VT1708S_0 PCM #2 Digital> at cad 0 nid 1 on hdac0 kld >> snd_hda [MPSAFE] (1p:1v/0r:0v channels simplex default) >> >> Audio plays correctly for both AC3 and MP3 audio tracks in both >> mplayer svn and the port. I wonder if it is possible the codec on this >> snd_hda card is slightly 'strange' and doing something out of the >> ordinary - maybe I'll have a browse of the linux azalia driver and see >> if they have any quirks for it. >> >> Cheers >> >> Tom >> > > Ok, I've made a few more tests. It seems that the problem only comes > about when I run mplayer svn with '-ao oss -afm hwac3'. If I run with > '-ao none' or with '-ao oss' (ie playing 2 channel pcm out over the > digital output), then the video plays back at the correct rate. > > Just to reiterate, all of those options work correctly with the > version in ports - if only that supported vdpau :) > > Alexander, is this like anything you have come across before with the > snd_hda driver? I have bootverbose logs of snd_hda if that helps[1]. > > Cheers > > Tom > > [1] http://pastebin.ca/1707268 > I've discovered the problem, reverting a sound rate fix in mplayer's libao2/ao_oss.c fixes it. Sorry to bother anyone. Cheers Tom PS: For posterity, it is this change that broke it: ------------------------------------------------------------------------ r29750 | cladisch | 2009-10-05 08:42:02 +0100 (Mon, 05 Oct 2009) | 1 line fix calculation of ao_data.bps for sample formats with more than 16 bits ------------------------------------------------------------------------ Index: libao2/ao_oss.c =================================================================== --- libao2/ao_oss.c (revision 29749) +++ libao2/ao_oss.c (revision 29750) @@ -396,8 +396,19 @@ } ao_data.bps=ao_data.channels; - if(ao_data.format != AF_FORMAT_U8 && ao_data.format != AF_FORMAT_S8) + switch (ao_data.format & AF_FORMAT_BITS_MASK) { + case AF_FORMAT_8BIT: + break; + case AF_FORMAT_16BIT: ao_data.bps*=2; + break; + case AF_FORMAT_24BIT: + ao_data.bps*=3; + break; + case AF_FORMAT_32BIT: + ao_data.bps*=4; + break; + } ao_data.outburst-=ao_data.outburst % ao_data.bps; // round down ao_data.bps*=ao_data.samplerate;
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