On Tuesday 15 February 2005 05:22, Blammo [doh] wrote: > That's odd. > > ahhh.. wait.. I think I got it... can't test this yet, but I have a theory: > > MythTV is set up for output to /dev/adsp, which is the ANALOG outputs > of my sound card, IE directly to the TV. MythVideo is setup up for > /dev/dsp, which is the DIGITAL outputs of my sound card. In the past, > this has made complete sense, since no TV was digital, and all movies > were. > This will be part of your problem.
> However, in this case, you can't send AC-3 out an analog port. so that > may be why we're hearing the chiff-chiff. > > Which now brings up several question: > > If I turn off AC-3 passthrough, will it play back correctly, IE convert it? > Is there any way to choose a different output device, only for AC-3? > IE, use /dev/adsp for normal output, use /dev/dsp for AC-3. > Yes > It's somewhat important, at least in my case, to keep the MythTV audio > going out the analogs, in that it gives volume control to Myth. As > soon as I sent the audio out the digital, I lose volume control. I've > played with all the mixer settings, and nothing seems to affect that. > Other people use the frontend way more than I do, they have a hard > time working multiple remotes. > > Thoughts? > > Thanks Isaac for your help with this. I hope it turns out being this easy.. > > On Mon, 14 Feb 2005 12:45:51 -0500, Isaac Richards <[EMAIL PROTECTED]> wrote: > > On Monday 14 February 2005 11:38 am, Blammo [doh] wrote: > > > Small is somewhat of a misnomer when it comes to DVB files, but here > > > is a short clip. I was on live, hit record, waited a few seconds, and > > > stopped the recording: > > > > > > http://216.27.229.222/tmp/air2pc.sample.nuv.gz > > > > > > Apologies, it is 30M, even GZ'd. > > > > Plays fine here in myth. > > > > Isaac It does not play fine for me. With SPDIF passthrough enabled I get a small burst of audio then nothing (it is AC3 2/0), except the video runs slow and the logs show a video/audio divergence. My log is different to your's in that it does detect the audio as AC3 and initialise appropriately. With SPDIF passsthrough off I get stuttering in the audio. Take all of this with a grain of salt since the sample is HD and I am not sure my processor can actually keep up with it, so that may be what was causing my stuttering. BTW where are you located? If changing to /dev/dsp doesn't work then try TS recording, it does not process the AC3 as much as PS does. Log from my startup: 2005-02-15 07:59:08.198 AVFD 2005-02-15 07:59:08.198 AVFD: Opening Stream #0: codec id 2 2005-02-15 07:59:08.200 Using libmpeg2 for video decoding 2005-02-15 07:59:08.200 detectInterlace(Detect Scan, Detect Scan, 59.9401, 720) ->Progressive Scan 2005-02-15 07:59:08.200 Interlaced: Progressive Scan video_height: 720 fps: 59.9401 2005-02-15 07:59:08.200 AVFD: Looking for decoder for 2 2005-02-15 07:59:08.200 AVFD 2005-02-15 07:59:08.200 AVFD: Opening Stream #1: codec id 86020 2005-02-15 07:59:08.200 AVFD: Looking for decoder for 86020 2005-02-15 07:59:08.201 Stream #1 (audio track #1) is an audio stream with 2 channels. 2005-02-15 07:59:08.201 Auto-selecting AC3 audio track (stream #1). 2005-02-15 07:59:08.201 Initializing audio parms from stream #0. 2005-02-15 07:59:08.202 Estimated bitrate = 45384 2005-02-15 07:59:08.224 Position map filled from DB to: 417 2005-02-15 07:59:08.225 SyncPositionMap prerecorded, from DB: 35 entries 2005-02-15 07:59:08.225 detectInterlace(Ignore Scan, Progressive Scan, 59.9401, 720) ->Progressive Scan 2005-02-15 07:59:08.225 Interlaced: Progressive Scan video_height: 720 fps: -1 Input #0, mpeg, from '/media/1032_20050215075400_20050215075400.nuv': Stream #0.0: Video: mpeg2video, 1280x720, 59.94 fps, 45000 kb/s Stream #0.1: Audio: ac3, 48000 Hz, stereo, 384 kb/s 2005-02-15 07:59:08.225 Position map found 2005-02-15 07:59:08.226 Commercial Detection initialized: width = 1280, height = 720, fps = 59.9401, method = 3 2005-02-15 07:59:08.227 Using Sample Spacing of 8 horizontal & 8 vertical pixels. 2005-02-15 07:59:08.228 CommDetect::ClearAllMaps() 2005-02-15 07:59:08.229 Killing AudioOutputDSP 2005-02-15 07:59:08.230 Opening audio device '/dev/dsp'. 2005-02-15 07:59:08.230 Opening OSS audio device '/dev/dsp'. 2005-02-15 07:59:08.231 Audio fragment size: 4096
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