http://www.apps4iphone.net/videocrash.html）。我正在尝试对该文件进行反向工程，以了解它为何以及如何损害iOS设备。用Mediainfo Mac查看该文件似乎没有任何异常：
* * * MediaInfo Mac 0.7.36.0 file analysis report.
* * * MediaInfo Mac is ©2010 by Diego Massanti - http://mediainfo.massanti.com
* * * MediaInfoLib by Jerome Martinez - http://mediainfo.sourceforge.net
Created on: Nov 22, 2016, 1:55:04 PM EST
Report for file: IMG_0942.mp4
General / Container Stream #1
Total Video Streams for this File.................1
Total Audio Streams for this File.................1
Video Codecs Used.................................AVC
Audio Codecs Used.................................AAC LC
File Format.......................................MPEG-4
Play Time.........................................5s 6ms
Total File Size...................................527 KiB
Total Stream BitRate..............................863 Kbps
Video Stream #1
Codec (Human Name)................................AVC
Codec (FourCC)....................................avc1
Codec Profile.....................................Baseline@L3.0
Frame Width.......................................480 pixels
Frame Height......................................480 pixels
Frame Rate........................................25.000 fps
Total Frames......................................126
Display Aspect Ratio..............................1.000
Scan Type.........................................Progressive
Color Space.......................................YUV
Codec Settings (Summary)..........................1 Ref Frames
QF (like Gordian Knot)............................0.137
Codec Settings (CABAC)............................No
Codec Settings (Reference Frames).................1
Video Stream Length...............................5s 6ms
Video Stream BitRate..............................789 Kbps
Video Stream BitRate Mode.........................VBR
Bit Depth.........................................8 bits
Video Stream Size.................................486 KiB (92%)
Video Stream Title................................Core Media Video
Date of Original Encoding.........................UTC 2016-11-17 20:14:29
Audio Stream #1
Codec.............................................AAC
Codec (FourCC)....................................40
Audio Stream Length...............................4s 504ms
Audio Stream BitRate..............................72.0 Kbps
Audio Stream BitRate Mode.........................CBR
Number of Audio Channels..........................1
Audio Channel's Positions.........................Front: C
Sampling Rate.....................................44.1 KHz
Audio Stream Size.................................39.2 KiB (7%)
Audio Stream Title................................Core Media Audio
Date of Original Encoding.........................UTC 2016-11-17 20:14:29
ffprobe输出：
➜ Downloads ffprobe IMG_0942.mp4
ffprobe version 3.2 Copyright (c) 2007-2016 the FFmpeg developers
built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
configuration: --prefix=/usr/local/Cellar/ffmpeg/3.2 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-vda
libavutil 55. 34.100 / 55. 34.100
libavcodec 57. 64.100 / 57. 64.100
libavformat 57. 56.100 / 57. 56.100
libavdevice 57. 1.100 / 57. 1.100
libavfilter 6. 65.100 / 6. 65.100
libavresample 3. 1. 0 / 3. 1. 0
libswscale 4. 2.100 / 4. 2.100
libswresample 2. 3.100 / 2. 3.100
libpostproc 54. 1.100 / 54. 1.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'IMG_0942.mp4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp41mp42isom
creation_time : 2016-11-17T20:14:29.000000Z
Duration: 00:00:05.01, start: 0.000000, bitrate: 862 kb/s
Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 71 kb/s (default)
Metadata:
creation_time : 2016-11-17T20:14:29.000000Z
handler_name : Core Media Audio
Stream #0:1(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 480x480, 794 kb/s, 25.17 fps, 25 tbr, 12800 tbn, 25600 tbc (default)
Metadata:
creation_time : 2016-11-17T20:14:29.000000Z
handler_name : Core Media Video
我不确定读取视频文件头内容的最佳方法Mac。但是，什么会导致该视频挂起iOS设备？它的标题格式错误吗？元数据或视频流损坏？另请注意，这不会使Mac上的Quicktime崩溃或iOS模拟器上的Safari / AVFoundation崩溃。
#1 楼
我一直在研究相同的问题，尽管我没有确切找到导致问题的原因。我尝试使用ffmpeg查找一些信息。运行时：ffmpeg -v error -i IMG_0942.mp4 -f null - 2> IMG_0942.mp4.log
它产生以下内容：
[h264 @ 0x8f4720] top block unavailable for requested intra4x4 mode -1 at 0 0
[h264 @ 0x8f4720] error while decoding MB 0 0
不确定是否知道如何阅读或它的含义（我没有），但这确实有助于演示找到问题所在的方法。
让我知道您是否在此问题上取得了更大的进步。
评论
PS。刚刚检查过，IOS 10.2修复了该问题。
– MikeSchem
16 Dec 14'在17:48