Hello, I think I've hit a timing bug related to mp3 playback over http. The first time I hit it I noticed that I could play a particular file over 3g, but that it would not play over wifi. These results were using the same url. I also found that I could put the same file on another server and it played over both 3g and wifi. At this point it appeared to be a simple timing issue.
Further investigation showed the problem was related not only to network speeds, but also to the characteristics of the file. In particular I found that the id3 tag of the mp3 affected when it would and would not play. If I reduced the size of the tag or removed it completely, the file would play over wifi. Here are some specifics: * http://wallacedash.com/id3bug/MediaPlayerTest.apk This is a rough and dirty activity to start audio playback. I did all my testing with this. * http://wallacedash.com/id3bug/MediaPlayerTest.tgz My eclipse project for the test app. * http://wallacedash.com/id3bug/tone_no_header.mp3 30 second mp3 of a simple tone. The file has no id3 tag. Using the test app, this file plays both over 3g and wifi * http://wallacedash.com/id3bug/tone_xxx.mp3 Same tone file as above, but with an ID3v2.3.0 tag added. The tag is 4096 bytes long. It contains a single field, TALB. This field is filled with x's. This file will play over 3g with the test app, but not over wifi. I did additional testing and found that only the size of the tag mattered. The content of the tag was irrelevant. One field, many fields, lots of spacing, no spacing, none of that mattered. I also discovered that reducing the size of the tag caused the file to play over wifi. Interestingly I also found that significantly increasing the size of the tag (for example, embedding album art) caused it to play over wifi. I did not track down the size cutoffs because I believe this to be a timing issue at the core and so the cutoffs would be particular to my network characteristics. My guess is that this is a bug in OpenCORE. Does anyone have any input? -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
