我有一些来自 iPad 的 mp4 视频文件。我想在 Linux 上播放它们。默认情况下，播放器无法识别该格式。
$ file 1.1.1.mp4
1.1.1.mp4: ISO Media, MP4 v2 [ISO 14496-14]
什么可以播放它们，或者我如何将它们转换为可以播放的格式？我试过 VLC。和 Totem。两者都无法识别该格式。
$ mediainfo -f 1.1.1.mp4
General
Count : 322
Count of stream of this kind : 1
Kind of stream : General
Kind of stream : General
Stream identifier : 0
Complete name : 1.1.1.mp4
File name : 1.1.1
File extension : mp4
File size : 113901589
File size : 109 MiB
File size : 109 MiB
File size : 109 MiB
File size : 109 MiB
File size : 108.6 MiB
Stream size : 113901589
Stream size : 109 MiB (100%)
Stream size : 109 MiB
Stream size : 109 MiB
Stream size : 109 MiB
Stream size : 108.6 MiB
Stream size : 109 MiB (100%)
Proportion of this stream : 1.00000
File last modification date : UTC 2017-04-02 08:10:35
File last modification date (local) : 2017-04-02 20:10:35
ffprobe version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2007-2017 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x9bc8e0] moov atom not found
1.1.1.mp4: Invalid data found when processing input
$ dpkg-query -Wf '${Status;1} ${Package}:${Architecture} ${Version}\n' 'gstreamer*-plugins-*' | sed -ne 's/^i //p'
gstreamer1.0-plugins-bad:amd64 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-bad-faad:amd64 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-bad-videoparsers:amd64 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-base:amd64 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-base:i386 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-base-apps:amd64 1.8.3-1ubuntu0.2
gstreamer1.0-plugins-good:amd64 1.8.3-1ubuntu0.4
gstreamer1.0-plugins-ugly:amd64 1.8.3-1ubuntu0.1
gstreamer1.0-plugins-ugly-amr:amd64 1.8.3-1ubuntu0.1
matthewh@xen:~/Desktop$ mkvmerge -o 1.1.1.mkv \( 1.1.1.mp4 \)
mkvmerge v8.8.0 ('Wind at my back') 64bit
'1.1.1.mp4': Using the demultiplexer for the format 'QuickTime/MP4'.
Error: Quicktime/MP4 reader: Have not found the 'mdat' atom. No movie data found.