哪些视频格式与资产库兼容? [英] What video formats are compatible with the assets library?

问题描述

哪些视频格式与iPhone的素材资源库兼容?

What video formats are compatible with the iPhone's assets library?

换句话说，ALAssetsLibrary的videoAtPathIsCompatibleWithSavedPhotosAlbum将针对哪种视频格式返回是"?

In other words, for what video formats will ALAssetsLibrary's videoAtPathIsCompatibleWithSavedPhotosAlbum return YES?

我似乎无法在iPhone参考资料库中找到与此相关的任何信息.

I can't seem to locate any information on this in the iPhone Reference Library.

推荐答案

尚无人提及，但这取决于iPhone/iOS设备.在制作尝试将Flickr视频复制到相册的应用程序时，当我在writeVideoAtPathToSavedPhotosAlbum上不断收到无效数据结果时，我感到沮丧:要求使用非Retina iPhone.

No one has mentioned this yet, but it depends on the iPhone / iOS device. In making an app that tries to copy Flickr videos to the photo album, I was getting frustrated when I kept getting invalid data results on writeVideoAtPathToSavedPhotosAlbum: calls for a non-Retina iPhone.

按照此问题的要求，我在各种尺寸的Flickr视频上运行了一些videoAtPathIsCompatibleWithSavedPhotosAlbum测试.

I ran some videoAtPathIsCompatibleWithSavedPhotosAlbum tests on Flickr videos of various sizes, as requested in this question.

                                  iPhone        iPhone       iPad
                               (non-Retina)    (Retina)
6119419764_orig.mov
H.264, 1,920 x 1,080               NO             NO          NO
Linear PCM, 16 bit 
little-endian signed 
integer, 48000 Hz, 
Stereo (L R)
35.33 Mbit/s

6119419764_hd.mp4
AVC Coding, 1,280 x 720            NO             YES         YES
AAC, 44100 Hz, Stereo (L R)
2.15 Mbit/s

6119419764_site.mp4
AVC Coding, 640 x 360              NO             YES         YES
AAC, 44100 Hz, Stereo (L R)
833.71 kbit/s

6119419764_mobile.mp4
AVC Coding, 568 x 320              YES            YES         YES
AAC, 32000 Hz, Mono
775.14 kbit/s

6121206003_orig.mov
(Taken with iPhone 3Gs)           
H.264, 480 x 360                   YES            YES         YES
AAC, 44100 Hz, Mono
865.94 kbit/s
30 fps

6110638568_reformat.mov
H.264, 640 x 360                   YES            YES         YES
AAC, 44100 Hz, Mono
3.57 Mbit/s

基于有限的测试，对于给定的格式和设备，看起来尺寸最重要. (对于当前的Flickr编码方法和

Based on this limited testing, for a given format and device, it looks like size matters most. (For the current Flickr encoding methods and url scheme, mobile videos work on all iOS device photo albums, whereas hd and site videos only work on Retina iPhones and iPads.)

一个有趣的旁注是，高清视频将在具有MPMoviePlayerController的非视网膜iPhone上播放 －您只是无法将它们保存到相册中.

An interesting side note is that HD videos will play on non-retina iPhones with the MPMoviePlayerController -- you just can't save them to the photo album.

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