Android A/ACodec: frameworks/av/media/libstagefright/ACodec.cpp:4019 CHECK_LE

2017-05-11 11:08:44 838 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›
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libstagefright 框架设计分析（2）： omx 相关 OMX 框架是android 音视频codec 的入口吧。 说到入口， 首先omx 就是在ACodec 被使用， 而且是以一个client 来使用， 所以omx 会有个service。这个分析就从这里开始好了。 bool ACodec::UninitializedState::onAllocateComponent(const sp &msg) { ALOGV("onAllocate 阅读详情
在开发android过程中要使用到vlc播放rtsp流，使用vlc在android平板上播放没有报错，但是在android开发板上报了三个错误logcat如下：
[01-01 08:22:18.187: D/VLC(3856): core playlist: meta ok for (null), need to fetch art
01-01 08:22:18.187: D/VLC(3856): core input: Creating an input for '(null)'
01-01 08:22:18.188: D/VLC(3856): core art finder: looking for meta fetcher module matching "any": 0 candidates
01-01 08:22:18.188: D/VLC(3856): core art finder: no meta fetcher modules
01-01 08:22:18.188: D/VLC(3856): core playlist: art not found for (null)
01-01 08:22:18.189: D/VLC(3856): core generic: creating audio output
01-01 08:22:18.189: D/VLC(3856): core audio output: looking for audio output module matching "opensles": 4 candidates
01-01 08:22:18.189: W/libOpenSLES(3856): class OutputMix interface 0 requested but unavailable MPH=43
01-01 08:22:18.189: D/VLC(3856): core audio output: using audio output module "opensles_android"
01-01 08:22:18.189: D/VLC(3856): core generic: keeping audio output
01-01 08:22:18.190: D/VLC(3856): core input: Creating an input for 'rtsp://172.21.102.50/1/1'
01-01 08:22:18.192: D/VLC(3856): core input: using timeshift granularity of 50 MiB, in path '/tmp'
01-01 08:22:18.192: D/VLC(3856): core input: `rtsp://172.21.102.50/1/1' gives access `rtsp' demux `' path `172.21.102.50/1/1'
01-01 08:22:18.192: D/VLC(3856): core input: specified demux `any'
01-01 08:22:18.192: D/VLC(3856): core input: creating demux: access='rtsp' demux='any' location='172.21.102.50/1/1' file='(null)'
01-01 08:22:18.192: D/VLC(3856): core demux: looking for access_demux module matching "rtsp": 7 candidates
01-01 08:22:18.192: D/VLC(3856): live555 demux: version 2014.07.25
01-01 08:22:18.196: D/VLC(3856): core playlist: meta ok for (null), need to fetch art
01-01 08:22:18.197: D/VLC(3856): core input: Creating an input for '(null)'
01-01 08:22:18.197: D/VLC(3856): core art finder: looking for meta fetcher module matching "any": 0 candidates
01-01 08:22:18.197: D/VLC(3856): core art finder: no meta fetcher modules
01-01 08:22:18.197: D/VLC(3856): core playlist: art not found for (null)
01-01 08:22:18.203: D/VLC(3856): core playlist: meta ok for (null), need to fetch art
01-01 08:22:18.204: D/VLC(3856): core input: Creating an input for '(null)'
01-01 08:22:18.204: D/VLC(3856): core art finder: looking for meta fetcher module matching "any": 0 candidates
01-01 08:22:18.204: D/VLC(3856): core art finder: no meta fetcher modules
01-01 08:22:18.204: D/VLC(3856): core playlist: art not found for (null)
01-01 08:22:18.208: D/VLC(3856): core playlist: meta ok for (null), need to fetch art
01-01 08:22:18.209: D/VLC(3856): core art finder: looking for meta fetcher module matching "any": 0 candidates
01-01 08:22:18.209: D/VLC(3856): core art finder: no meta fetcher modules
01-01 08:22:18.209: D/VLC(3856): core playlist: art not found for (null)
01-01 08:22:18.219: D/VLC(3856): live555 demux: RTP subsession 'video/H264'
01-01 08:22:18.224: E/[EGL-ERROR](3856): EGLBoolean __egl_platform_create_surface_window(egl_surface*, mali_base_ctx_handle):933: =========> usage 0x900
01-01 08:22:18.231: D/VLC(3856): core input: selecting program id=0
01-01 08:22:18.232: D/VLC(3856): live555 demux: RTP subsession 'audio/PCMU'
01-01 08:22:18.241: E/SurfaceInfo(3856): 1254:586
01-01 08:22:18.244: D/VLC(3856): live555 demux: setup start: 0.000000 stop:0.000000
01-01 08:22:18.277: D/VLC(3856): live555 demux: play start: 0.000000 stop:0.000000
01-01 08:22:18.277: D/VLC(3856): core demux: using access_demux module "live555"
01-01 08:22:18.277: D/VLC(3856): core decoder: looking for decoder module matching "mediacodec,iomx,all": 34 candidates
01-01 08:22:18.306: W/AudioCapabilities(3856): Unsupported mime audio/ac3
01-01 08:22:18.308: W/AudioCapabilities(3856): Unsupported mime audio/ra
01-01 08:22:18.309: W/AudioCapabilities(3856): Unsupported mime audio/x-ms-wma
01-01 08:22:18.310: W/AudioCapabilities(3856): Unsupported mime audio/dts
01-01 08:22:18.316: W/AudioCapabilities(3856): Unsupported mime audio/mpeg-L1
01-01 08:22:18.318: W/AudioCapabilities(3856): Unsupported mime audio/mpeg-L2
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 4 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 4 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 4 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 32 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 32 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 32 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 64 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 64 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unsupported profile 64 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 128 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 128 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 128 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 256 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 256 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 256 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 512 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 512 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 512 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 1024 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 1024 for video/avc
01-01 08:22:18.325: W/VideoCapabilities(3856): Unrecognized profile 1024 for video/avc
01-01 08:22:18.328: W/VideoCapabilities(3856): Unsupported mime video/mpeg2
01-01 08:22:18.336: I/VideoCapabilities(3856): Unsupported profile 2 for video/mp4v-es
01-01 08:22:18.336: I/VideoCapabilities(3856): Unsupported profile 2 for video/mp4v-es
01-01 08:22:18.336: I/VideoCapabilities(3856): Unsupported profile 4 for video/mp4v-es
01-01 08:22:18.336: I/VideoCapabilities(3856): Unsupported profile 4 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 8 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 8 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 16 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 16 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 32 for video/mp4v-es
01-01 08:22:18.337: I/VideoCapabilities(3856): Unsupported profile 32 for video/mp4v-es
01-01 08:22:18.341: W/VideoCapabilities(3856): Unsupported mime video/mp43
01-01 08:22:18.344: W/VideoCapabilities(3856): Unsupported mime video/x-pn-realvideo
01-01 08:22:18.351: W/VideoCapabilities(3856): Unsupported mime video/x-ms-wmv
01-01 08:22:18.355: W/VideoCapabilities(3856): Unsupported mime video/wvc1
01-01 08:22:18.358: W/VideoCapabilities(3856): Unsupported mime video/vc1
01-01 08:22:18.362: W/VideoCapabilities(3856): Unsupported mime video/x-flv
01-01 08:22:18.420: I/VideoCapabilities(3856): Unsupported profile 4 for video/mp4v-es
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.426: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.427: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
01-01 08:22:18.428: W/VLC(3856): mediacodec decoder: Exception occurred in MediaCodecInfo.getCapabilitiesForType
...全文
Linux安卓模拟器花屏根源：NV12与I420像素格式失配解析 视频解码中的YUV格式是跨平台渲染的基础概念，其中NV12和I420作为主流YUV420变体，因色度平面排列差异导致兼容性问题。其原理在于NV12将U/V交错存储于同一平面，而I420则分立存储，造成Linux合成器误读像素数据。该失配不触发系统报错，却引发稳定花屏，技术价值体现在避免盲目重装驱动或降级硬件加速。典型应用场景涵盖Waydroid、Android-x86等安卓模拟器在统信UOS、Ubuntu等Linux发行版中的视频播放，尤其在H.264/HEVC硬解输出路径中高频出现。本文聚焦NV12格式透 阅读详情

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