相关疑难解决方法(0)

我正在使用Android 4.3的新MediaCodec和MediaMuxer API开发一个关于previewTexture录制的Android测试用例的实现.

I've managed to record the preview stream with a framerate of about 30fps by setting the recordingHint to the camera paremeters.

However, I ran into a delay/lag problem and don't really know how to fix that. When recording the camera preview with quite standard quality settings (1280x720, bitrate of ~8.000.000) the preview and the encoded material suffers from occasional lags. To be more specific: This lag occurs about every 2-3 seconds and takes about 300-600ms. …

我写了一个演示来使用 MediaCodec 和 MediaMuxer 录制视频。

我用我的demo录制了一段视频，用ffprobe查看视频，结果如下：

  Duration: 00:00:06.86, start: 0.000000, bitrate: 723 kb/s
Stream #0:0(eng): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 320x240, 619 kb/s, SAR 1:1 DAR 4:3, 30.02 fps, 30 tbr, 90k tbn, 180k tbc (default)
Metadata:
  creation_time   : 2015-06-05 13:19:24
  handler_name    : VideoHandle
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 96 kb/s (default)
Metadata:
  creation_time   : 2015-06-05 13:19:24
  handler_name    : SoundHandle

它包含视频和音频信息，我发现音频属性与我在源代码中设置的相同，但视频属性不正确。我的视频设置源码如下：

        MediaFormat format = MediaFormat.createVideoFormat(MIME_TYPE, mWidth, mHeight);
    format.setInteger(MediaFormat.KEY_COLOR_FORMAT,
            MediaCodecInfo.CodecCapabilities.COLOR_FormatSurface);
    format.setInteger(MediaFormat.KEY_BIT_RATE, 384000); …