在Android 4.4(Kitkat - API level 19)上集成了一个比较好用的视频(.mp4格式)录制功能 –screenrecord。
使用方法
1. 基本用法
$ adb shell screenrecord /sdcard/myscreenrecord.mp4
/sdcard/myscreenrecord.mp4为视频录制文件路径
录制默认分辨率,默认4Mbps,默认180s的视频,保存到sdcard上名为myscreenrecord.mp4
2. 旋转(参数:–rotate)
$ adb shell screenrecord --rotate /sdcard/myscreenrecord.mp4
旋转90度
3. 指定分辨率(参数:–size)
$adb shell screenrecord --size 112x112 /sdcard/myscreenrecord.mp4
分辨率为112x112,建议不要指定分辨率,使用默认分辨率效果最佳;
注意,分辨率不是完全可以随意定制的,比如在我手机上录制100x100的会提示错误:
The max width/height supported by codec is1920x1088
100x100is not supported by codec, suggest to set it as112x112
4. 指定比特率(参数:–bit-rate)
$adb shell screenrecord --bit -rate 8000000 /sdcard/myscreenrecord.mp4
设置比特率为8Mbps,比特率越大,文件越大,画面越清晰;
5. 限制录制时间 (参数: –time-limit)
$adb shell screenrecord --time -limit 10 /sdcard/myscreenrecord.mp4
限制视频录制时间为10s,如果不限制,默认180s
6. 导出视频
$adb pull /sdcard/myscreenrecord.mp4
7. 注意
请关注视频文件生成大小,根据自身情况而定;
暂不支持声音;
咱时不支持模拟器录制(模拟器录制看这里),出现如下提示:Unable to get output buffers (err=-38)
Encoder failed (err=-38),可认为是此原因;
8. 命令查看
adb shell screenrecord --help
Usage: screenrecord [options]
Records the device's display to a .mp4 file.
Options:
--size WIDTHxHEIGHT
Set the video size, e.g."1280x720". Default is the device's main
display resolution (if supported), 1280x720if not. For best
results,use a size supported by the AVC encoder.
--bit -rate RATE
Set the video bit rate, in megabits per second. Default4Mbps.
--time -limit TIME
Set the maximum recording time, in seconds. Default / maximum is180.
--rotate
Rotate the output90 degrees.
--verbose
Display interesting information on stdout.
--help
Showthis message.
Recording continues until Ctrl-C is hit or the time limit is reached.
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