赞
踩
很多开发者在跟我聊天的时候,经常问我,为什么一个RTMP或RTSP播放器,你们需要设计那么多的接口,真的有必要吗?带着这样的疑惑,我们今天聊聊Android平台RTMP、RTSP播放器常规功能,如软硬解码设置、实时音量调节、实时快照、实时录像、视频view翻转和旋转、画面填充模式设定、解码后YUV、RGB数据回调等:
RTMP或RTSP直播播放器,特别是在一些交互场景下,对延迟要求近乎苛刻,所以,毫秒级的延迟,是一个直播播放器聊下去的基础,200-400ms的整体时延,是大家比较期望的,是的,你没看错,RTMP的也可以做到极低延迟。
Android平台特别是超过1080p的分辨率的流数据,如果设备性能一般,软解效率不一定高,这时候建议硬解码,硬解码我们分两种,一种是设置surface模式的硬解码,这种无法快照和回调yuv、rgb数据,另一种就是常规硬解,直接出原始解码后数据的,区分两种硬解码模式,我们设计了如下的接口:
- /**
- * 设置视频硬解码下Mediacodec自行绘制模式(此种模式下,硬解码兼容性和效率更好,回调YUV/RGB和快照功能将不可用)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param isHWRenderMode: 0: not enable; 1: 用SmartPlayerSetSurface设置的surface自行绘制
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetHWRenderMode(long handle, int isHWRenderMode);
调用如下:
- if (isHardwareDecoder && is_enable_hardware_render_mode) {
- libPlayer.SmartPlayerSetHWRenderMode(playerHandle, 1);
- }
硬解码设置如下,分别区分264、265硬解:
- if (isHardwareDecoder) {
- int isSupportHevcHwDecoder = libPlayer.SetSmartPlayerVideoHevcHWDecoder(playerHandle, 1);
-
- int isSupportH264HwDecoder = libPlayer
- .SetSmartPlayerVideoHWDecoder(playerHandle, 1);
-
- Log.i(TAG, "isSupportH264HwDecoder: " + isSupportH264HwDecoder + ", isSupportHevcHwDecoder: " + isSupportHevcHwDecoder);
- }
实时音量调节主要用于实时静音和实时调节播放端的音量,特别是多实例播放的时候,非常有必要:
- /**
- * 设置播放音量
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param volume: 范围是[0, 100], 0是静音,100是最大音量, 默认是100
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetAudioVolume(long handle, int volume);
针对RTSP的TCP、UDP模式设置,RTSP超时时间设置,大家可能遇到过这样的场景,有些RTSP服务或网络环境下,只支持TCP或UDP,这时候,就需要有TCP/UDP模式设置,还有自动切换TCP UDP模式选项,如果连上RTSP服务,但是收不到数据,通过RTSP timeout时间来设置重连尝试间隔:
- /**
- * 设置RTSP TCP/UDP模式(默认UDP模式)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param is_using_tcp: if with 1, it will via TCP mode, while 0 with UDP mode
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRTSPTcpMode(long handle, int is_using_tcp);
-
- /**
- * 设置RTSP超时时间, timeout单位为秒,必须大于0
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param timeout: RTSP timeout setting
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRTSPTimeout(long handle, int timeout);
-
- /**
- * 设置RTSP TCP/UDP自动切换
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * NOTE: 对于RTSP来说,有些可能支持rtp over udp方式,有些可能支持使用rtp over tcp方式.
- * 为了方便使用,有些场景下可以开启自动尝试切换开关, 打开后如果udp无法播放,sdk会自动尝试tcp, 如果tcp方式播放不了,sdk会自动尝试udp.
- *
- * @param is_auto_switch_tcp_udp 如果设置1的话, sdk将在tcp和udp之间尝试切换播放,如果设置为0,则不尝试切换.
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRTSPAutoSwitchTcpUdp(long handle, int is_auto_switch_tcp_udp);
- /**
- * 设置视频垂直反转
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param is_flip: 0: 不反转, 1: 反转
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetFlipVertical(long handle, int is_flip);
-
- /**
- * 设置视频水平反转
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param is_flip: 0: 不反转, 1: 反转
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetFlipHorizontal(long handle, int is_flip);
-
- /**
- * 设置顺时针旋转, 注意除了0度之外, 其他角度都会额外消耗性能
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param degress: 当前支持 0度,90度, 180度, 270度 旋转
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRotation(long handle, int degress);
- /**
- * 设置视频画面的填充模式,如填充整个view、等比例填充view,如不设置,默认填充整个view
- * @param handle: return value from SmartPlayerOpen()
- * @param render_scale_mode 0: 填充整个view; 1: 等比例填充view, 默认值是0
- * @return {0} if successful
- */
- public native int SmartPlayerSetRenderScaleMode(long handle, int render_scale_mode);
通过设置下载速度回调间隔,上层可以知道当前的网络状态,也可根据回调的下载速度,做逻辑上的调整。
- /**
- * Set report download speed(设置实时回调下载速度)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param is_report: if with 1, it will report download speed, it with 0: does not it.
- *
- * @param report_interval: report interval, unit is second, it must be greater than 0.
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetReportDownloadSpeed(long handle, int is_report, int report_interval );
实时快照,对RTSP或RTMP播放器来说,非常有价值,用户感兴趣的帧数据,可以直接写png文件保存下来,后续还可以针对保存下来的png数据,做二次分析。
- /**
- * Set if needs to save image during playback stream(是否启动快照功能)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param is_save_image: if with 1, it will save current image via the interface of SmartPlayerSaveCurImage(), if with 0: does not it
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSaveImageFlag(long handle, int is_save_image);
-
- /**
- * Save current image during playback stream(实时快照)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param imageName: image name, which including fully path, "/sdcard/daniuliveimage/daniu.png", etc.
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSaveCurImage(long handle, String imageName);
调用如下:
- btnCaptureImage.setOnClickListener(new Button.OnClickListener() {
- @SuppressLint("SimpleDateFormat")
- public void onClick(View v) {
-
- String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss")
- .format(new Date());
- String imageFileName = "dn_" + timeStamp; // 创建以时间命名的文件名称
-
- String imagePath = imageSavePath + "/" + imageFileName + ".png";
-
- Log.i(TAG, "imagePath:" + imagePath);
-
- libPlayer.SmartPlayerSaveCurImage(playerHandle, imagePath);
- }
- });
实时录像的重要性不言而喻,我们好多开发者对实时录像有些误区,录像不止是写文件就完事了,还需要更精细化的粒度控制,比如单个文件大小设置、只录视频或者音频,其他音频格式转AAC后录制等。
- /**
- * Create file directory(创建录像目录)
- *
- * @param path, E.g: /sdcard/daniulive/rec
- *
- * <pre> The interface is only used for recording the stream data to local side. </pre>
- *
- * @return {0} if successful
- */
- public native int SmartPlayerCreateFileDirectory(String path);
-
- /**
- * Set recorder directory(设置录像目录)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param path: the directory of recorder file
- *
- * <pre> NOTE: make sure the path should be existed, or else the setting failed. </pre>
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRecorderDirectory(long handle, String path);
-
- /**
- * Set the size of every recorded file(设置单个录像文件大小,如超过设定大小则自动切换到下个文件录制)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @param size: (MB), (5M~500M), if not in this range, set default size with 200MB.
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRecorderFileMaxSize(long handle, int size);
-
- /*
- * 设置录像时音频转AAC编码的开关
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * aac比较通用,sdk增加其他音频编码(比如speex, pcmu, pcma等)转aac的功能.
- *
- * @param is_transcode: 设置为1的话,如果音频编码不是aac,则转成aac,如果是aac,则不做转换. 设置为0的话,则不做任何转换. 默认是0.
- *
- * 注意: 转码会增加性能消耗
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRecorderAudioTranscodeAAC(long handle, int is_transcode);
-
-
- /*
- *设置是否录视频,默认的话,如果视频源有视频就录,没有就没得录, 但有些场景下可能不想录制视频,只想录音频,所以增加个开关
- *
- *@param is_record_video: 1 表示录制视频, 0 表示不录制视频, 默认是1
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRecorderVideo(long handle, int is_record_video);
-
-
- /*
- *设置是否录音频,默认的话,如果视频源有音频就录,没有就没得录, 但有些场景下可能不想录制音频,只想录视频,所以增加个开关
- *
- *@param is_record_audio: 1 表示录制音频, 0 表示不录制音频, 默认是1
- *
- * @return {0} if successful
- */
- public native int SmartPlayerSetRecorderAudio(long handle, int is_record_audio);
-
- /**
- * Start recorder stream(开始录像)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @return {0} if successful
- */
- public native int SmartPlayerStartRecorder(long handle);
-
- /**
- * Stop recorder stream(停止录像)
- *
- * @param handle: return value from SmartPlayerOpen()
- *
- * @return {0} if successful
- */
- public native int SmartPlayerStopRecorder(long handle);
实际上,除了上述提到的功能外,RTMP或RTSP播放器,还需要支持的客制化功能有支持回调H.264/H.265/AAC数据,或回到解码后的YUV或RGB数据,设置播放缓冲、设置快速播放、设置音频输出类型等,一个通用的RTSP、RTMP播放器,延迟是基础、功能完备是加分项,性能优异稳定性好,才敢推给客户,让客户在现场放心使用,无后顾之忧。
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。