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February 21, 2011 11:35 PM

Categories: iPhone & iDevices

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Jeff92677

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Joined: 02/18/2011

I like to use 320K bitrates for maximum quality on my MP3 files, but I've found that when streaming to my iPhone or iPad over the 3G network, the stream stops, restarts, stops, etc.

I thought it might be the bitrate, since Apple likes the default of 128K I figured that would be better (no doubt this is a common problem for audio streaming).

I converted one of my live recordings from 320K to 128K and it now streams perfectly.

My guess is that for the iPhone, an even lower bitrate might be okay, but 128K is still pretty good for music.

Has anyone else had the pausing issue during playback, and solved it a different way?

A related issue is "How to batch convert a directory of 320K MP3 files to 128K"

I found a free utility that works great. You do have to setup the output directory before attempting a batch convert so your output ends up where you want it.

http://cdexos.sourceforge.net/

Discussion:    Add a Comment | Comments 1-7 of 7 | Latest Comment

February 23, 2011 5:15 AM updated: February 23, 2011 5:17 AM

What's your upload speed to the internet? It seems that even 320Kbps should work over 3G as long as your ISP is giving you more than that for your upload from the PogoPlug.

I can stream 320Kbps video over to my iPhone 3G when using the PogoPlug website (i.e. my.pogoplug.com).

February 23, 2011 12:12 PM

coldfinish said: What's your upload speed to the internet? It seems that even 320Kbps should work over 3G as long as your ISP is giving you more than that for your upload from the PogoPlug. I can stream 320Kbps video over to my iPhone 3G when using the PogoPlug website (i.e. my.pogoplug.com).

My upload speed is about 3 mbit, and download is about 9 mbit. I don't think that's the issue but higher bitrates do require higher network speeds, no doubt.

The 320k bitrate works pretty well over 3G to my iPhone, but it does pause from time to time. I don't think it's my upload speed, since I can upload at about 3 mbit, and download at about 9 to 10 mbit.

I have some live music recordings that I'm sharing, and they were WAV files, then 320K MP3, and now I've created a 128K directory with those files (still higher than FM which is 96K) and the streaming was not interrupted.

Apple tunes are 128-K (the ones they sell) so it's apparently a pretty good rate, and less prone to problems with network speed and congestion.

So you're right, 320K SHOULD work, but (1) it's probably overkill, and (2) 128K is probably more reliable for uninterrupted streaming.

The key to my post is the very nice batch convert program I found to make the copy/convert job very easy.

February 23, 2011 11:29 PM updated: February 23, 2011 11:33 PM

What does the speedtest app say about your 3G speeds? If you are in an area that has weak 3G reception then that could be the problem. Otherwise, I guess it would be possible that your 3Mbps uplink is so fast that the playback begins almost immediately and that could lead to skipping at the start of the songs if there was a network slowdown before any amount of buffering had been done.

Lastly, is it possible that your Pogoplug is busy scanning your hard drive for files/media or perhaps it is still transcoding video? If you have a large hard drive or if you've enabled automatic video transcoding and you have a lot of video then it could takes days for the PogoPlug to work through all of that data.

Just today I was listening to some 256Kbps audio encodings and watching 320Kbps video over 3G on my iPad and it worked nearly flawlessly. I had one short skip in the audio but I think that happened as I passed through an area of weak 3G signal.

February 24, 2011 1:16 PM updated: February 24, 2011 1:26 PM

Coldfish,

My rhetorical question was intended to get some attention to an issue that many have not considered -- 320Kbit music may be fine for authoring a CD, or playing on a high quality audio system, but it not required for most casual listening. I don't think people realize this or pay much attention to it.

Bitrates above FM quality (which is 96Kbit) are simply going to run into more problems when streaming, it's a fact, not conjecture. A streaming server that gets feedback from the listening device will adjust the streaming quality to accomodate changing conditions. This is how Netflix works with different network quality (congestion, delays, bandwidth, etc.).

I use a video streaming server that works great with iPhone and iPad video by adjusting the quality based on "network quality" which changes constantly.

For video, see pogoplug's help

http://www.pogoplugged.com/article/14727/Pogoplug-Media-Streaming-Video-Trans...

I can convert videos to the required format, bypassing the need for transcoding. From the above link: "Standard MP4 format utilizing H.264 encoding is the recommended format. Some users have reported excellent luck with clicking the "Web Optimized" format in HandBrake."

I haven't tried it yet, but I'm going to get handbrake and give it a try. I have other video formatting programs, but handbrake is free and they have a version for MAC, PC, Linux, etc. http://handbrake.fr

Thanks for your interest, and consider the purpose of my rhetorical "question"

Jeff

February 25, 2011 5:10 AM updated: February 25, 2011 5:28 AM

Jeff, I already use Handbrake for my video transcoding and it seems to work very well with the Pogoplug and for 3G access with my iPad. I have a pretty slow internet connection (DSL), in fact I get no better than about 420Kbps on the uplink and even with that I have very few problems with video encoded at 320Kbps.

Also, as long as my uplink is working correctly I've had no problems with audio that is encoded at 256Kbps. However, I live in an area that actually has pretty good 3G coverage and I often measure well over 1Mbps on 3G downloads.

In any case, I agree that 320Kbps is overkill for mobile audio and in fact when I encode for video I usually use 96Kbps at 22KHz/24KHz for the audio (if stereo) and something even lower for mono or if the audio really isn't that important (i.e. use more of the bandwidth for the actual video). Thus, when I said I can watch video at 320Kbps I'm talking about the combined rate for both the video and audio.

November 16, 2011 10:00 PM

Brief followup:

Over the past few months, I've converted some of my music to 96 Kbit, FM station quality, and it sounds very good over 3G, no skips, pauses etc. This isn't recommended for mastering CDs or MP3 disks, but it's good for streaming audio over 3G.

I use a very nice program called media monkey. http://www.mediamonkey.com/

It can read and convert FLAC files to MP3, and convert MP3 bit rates to other bit rates. It can tag Music files with images which are easily accessed by searching for images using google.com and dragging the image off the browser page right into the image box, the way you can with iTunes, a clever feature.

I tried handbrake, I agree, it's an excellent file converter but it won't create AVI files that I can play on my DVD player, but for converting video media for iTunes it's great and I use it for that purpose.

Jeff

December 9, 2011 1:01 AM

I've been using Apple's 80Kbps AAC-HE and that sounds pretty good to me. In any case, in addition to encoding/listening quality you really need to be mindful of any data caps that your carrier may apply. That is, no reason to waste bits if you really don't need the very highest quality (for example, I don't believe that you could ever hear the difference in the playback while in a car that is traveling down the highway at 65MPH).

Discussion:    Add a Comment | Back to Top | Comments 1-7 of 7 | Latest Comment

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