Stuttering audio with .M4A (iTunes AAC) audio file

[DronnyBoyd]

I've got some .M4A files which are AAC-encoded audio, ripped from CD by iTunes. With FFdshow they play fine in Windows Media Player, and sort-of OK in GBPVR, but they stutter every time a key is pressed. Playing them in the "My Music" plugin, they sounded awful until I turned off the big time-display that updates every second, then they seem to play ok until I press any key. In the built-in Music Library they seem to play ok, but stutter whenever a key is pressed too. Using GraphEdit it looks like they are uing FFdshow as the audio decoder, so I tried both 'realaac' and 'libfaad2' settings for AAC decoding in FFdshow, but it makes no difference.

I'm not sure if this is something GBPVR can do anything about, it may be purely internal to FFdshow, I don't know enough about DirectShow to say.

The stutter/jump appears to be caused whenever the display is updated, I guess.

Any ideas (Sub?)??

[sub]

GB-PVR doesnt do playback of these files itself. Instead it just asks windows to do it. If its not playing smoothly, then its something about the combination of directshow filters on your machine. All I can suggest is try different decoders until you find one that works well for you.

.M4A audio is not type test, so I cant really give you anymore to go on than that.

[DronnyBoyd]

GB-PVR doesnt do playback of these files itself. Instead it just asks windows to do it. If its not playing smoothly, then its something about the combination of directshow filters on your machine. All I can suggest is try different decoders until you find one that works well for you.

.M4A audio is not type test, so I cant really give you anymore to go on than that.

I thought that might be the case, so maybe the AAC decoder doesn't give itself enough buffering or something. Funny thing is, playing back thru WMP it doesn't seem to suffer the same thing, even with visualisations running. Still I got it working okay now without the big-clock display in the "My Music" plugin, as long as you don't press any buttons on the remote

If its any help I could send you a .M4A file, but I doubt its worthwhile if there's nothing in GBPVR that could affect it.

Anyhow, thanks for a superb app, its running beautifuly on my HTPC in the living room, the wide and kids use it with just the remote, and I only very occasionally break out the keyboard+mouse for a bit of sys-admin'ing.

[sub]

If its any help I could send you a .M4A file..

To be honest, I dont really have the time to look at it, so I'll decline the offer.

Anyhow, thanks for a superb app, its running beautifuly on my HTPC in the living room, the wide and kids use it with just the remote, and I only very occasionally break out the keyboard+mouse for a bit of sys-admin'ing.

Cheers

[DronnyBoyd]

Anyhow, thanks for a superb app, its running beautifuly on my HTPC in the living room, the wide and kids use it with just the remote, and I only very occasionally break out the keyboard+mouse for a bit of sys-admin'ing.

Obviously, that should say "wife"

[sub]

lol - that sort of comment mistake could land you in hot water