CN105744278A - Android system based H264 coding and decoding method - Google Patents
Android system based H264 coding and decoding method Download PDFInfo
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- CN105744278A CN105744278A CN201610086874.2A CN201610086874A CN105744278A CN 105744278 A CN105744278 A CN 105744278A CN 201610086874 A CN201610086874 A CN 201610086874A CN 105744278 A CN105744278 A CN 105744278A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention discloses an android system based H264 coding and decoding method. The decoding process comprises the steps of creating a decoder by using MediaCodec.createDecoderByType when the parameter is applicable to video/avc; creating a decoding format by using MediaFormat.createVideoFormat, wherein the parameters are the video/avc, a video length and a video width; configuring the created decoder by using a MediaCodec.configure interface, and carrying the created decoding format parameters; placing decoding data to the decoder by using MediaCodec.quequeInputBuffer and then obtaining decoded YUV data through the MediaCodec.dequeue InputBuffer; and cycling until decoding is finished. According to the android system based H264 coding and decoding method, hardware coding and decoding is finished by using MediaCodec, and hardware acceleration can be used directly.
Description
[technical field]
The present invention relates to a kind of method based on Android system H264 encoding and decoding.
[background technology]
Audiovisual applications, such as VOIP voice and video telephone and field of video monitoring, in order to improve Consumer's Experience, video is usually and requires high definition, but time mobile phone terminal viewing video often occurs, meeting one card, bypassing network reason, major part is attributed to CPU and takes and cause, performance is inadequate, for solving this problem, the scheme that eager searching can be hardware-accelerated.
In order to solve this problem, one is to use software codec by JNI encapsulation, if use software mode, performance is not high, in encoding and decoding high-resolution, time such as 720P/1080P/4K, CPU is substantially unable to do what one wishes, and another is the interface using vendor hardware encoding and decoding, but these interfaces Ge great producer all disunities, often changing a chip solution, corresponding interface also and then changes.
Early stage, androidSDK was but without the API providing hardware encoding and decoding, until after API16, just providing MediaCodec class, just supported hardware compression interface.
Owing to android mobile phone substantially updates on the market, system after 4.x substantially, the MediaCodec interface that the unified androidsdk of use of the decoding interface of the present invention provides.
[summary of the invention]
The technical problem to be solved is in that to provide a kind of method based on Android system H264 encoding and decoding, uses MediaCocdec to complete hardware compression, can directly use hardware-accelerated.
The present invention is achieved in that
A kind of method based on Android system H264 encoding and decoding, including:
Decoding process:
Step a1: use MediaCodec.createDecoderByType, parameter is suitable for video/avc and creates decoder；
Step a2: using MediaFormat.createVideoFormat, parameter is video/avc, and video is long, video width creates codec format；
Step a3: use the MediaCodec.configure interface configuration step a1 decoder created, carry the step a2 codec format parameter created；
Step a4: use MediaCodec.quequeInputBuffer that decoding data are put into decoder, then pass through MediaCodec.dequeueInputBuffer and obtain decoded yuv data；
Step a5: circulation step a4 until decoding terminates；
Coding flow process:
Step b1: use MediaCodec.createEncoderByType, parameter is suitable for video/avc and creates decoder；
Step b2: using MediaFormat.createVideoFormat to create video format, video format parameter has video/aac, and video length and width, frame per second, code check, IDR interval, color space are set to YUV420P；
Step b3: use the MediaCodec.configure interface configuration step b1 encoder created, carry the step b2 video format parameter created；
Step b4:android camera collection to data form be usually NV21 form, it is necessary to convert YUV420P form to, after converting, use MediaCodec.quequeInputBuffer YUV420P data are put into encoder；
Step b5: obtain the H264 data after coding by MediaCodec.dequeueInputBuffer；
Step b6: circulation step b4, b5, until end-of-encode.
It is an advantage of the current invention that: the invention solves use high-resolution video encoding and decoding performance bottleneck problem, improve audiovisual applications and use high-resolution, and tool has certain versatility in android framework, can directly use hardware-accelerated.
[accompanying drawing explanation]
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is decoding process schematic diagram in the present invention.
Fig. 2 is that the present invention encodes schematic flow sheet.
[detailed description of the invention]
Refer to shown in Fig. 1 and Fig. 2, a kind of method based on Android system H264 encoding and decoding, including:
Decoding process:
Step a1: use MediaCodec.createDecoderByType, parameter is suitable for video/avc and creates decoder；
Step a2: using MediaFormat.createVideoFormat, parameter is video/avc, and video is long, video width creates codec format；
Step a3: use the MediaCodec.configure interface configuration step a1 decoder created, carry the step a2 codec format parameter created；
Step a4: use MediaCodec.quequeInputBuffer that decoding data are put into decoder, then pass through MediaCodec.dequeueInputBuffer and obtain decoded yuv data；
Step a5: circulation step a4 until decoding terminates；
Coding flow process:
Step b1: use MediaCodec.createEncoderByType, parameter is suitable for video/avc and creates decoder；
Step b2: use MediaFormat.createVideoFormat to create video format, video format parameter has video/aac, and video resolution (long, wide), frame per second, code check, IDR interval, color space is set to YUV420P；
Step b3: use the MediaCodec.configure interface configuration step b1 encoder created, carry the step b2 video format parameter created；
Step b4:android camera collection to data form be usually NV21 form, it is necessary to convert YUV420P form to, after converting, use MediaCodec.quequeInputBuffer YUV420P data are put into encoder；
Step b5: obtain the H264 data after coding by MediaCodec.dequeueInputBuffer；
Step b6: circulation step b4, b5, until end-of-encode.
The invention solves use high-resolution video encoding and decoding performance bottleneck problem, improve audiovisual applications and use high-resolution, and tool has certain versatility in android framework, can directly use hardware-accelerated.
The foregoing is only the preferably enforcement use-case of the present invention, be not intended to limit protection scope of the present invention.All any amendment of making, equivalent replace and improvement etc. within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (1)
1. the method based on Android system H264 encoding and decoding, it is characterised in that: including:
Decoding process:
Step a1: use MediaCodec.createDecoderByType, parameter is suitable for video/avc and creates decoder；
Step a2: using MediaFormat.createVideoFormat, parameter is video/avc, and video is long, video width creates codec format；
Step a3: use the MediaCodec.configure interface configuration step a1 decoder created, carry the step a2 codec format parameter created；
Step a4: use MediaCodec.quequeInputBuffer that decoding data are put into decoder, then pass through MediaCodec.dequeueInputBuffer and obtain decoded yuv data；
Step a5: circulation step a4 until decoding terminates；
Coding flow process:
Step b1: use MediaCodec.createEncoderByType, parameter is suitable for video/avc and creates decoder；
Step b2: using MediaFormat.createVideoFormat to create video format, video format parameter has video/aac, and video length and width, frame per second, code check, IDR interval, color space are set to YUV420P；
Step b3: use the MediaCodec.configure interface configuration step b1 encoder created, carry the step b2 video format parameter created；
Step b4:android camera collection to data form be usually NV21 form, it is necessary to convert YUV420P form to, after converting, use MediaCodec.quequeInputBuffer YUV420P data are put into encoder；
Step b5: obtain the H264 data after coding by MediaCodec.dequeueInputBuffer；
Step b6: circulation step b4, b5, until end-of-encode.
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| CN201610086874.2A CN105744278A (en) | 2016-02-16 | 2016-02-16 | Android system based H264 coding and decoding method |
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| CN201610086874.2A CN105744278A (en) | 2016-02-16 | 2016-02-16 | Android system based H264 coding and decoding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660745A (en) * | 2018-12-21 | 2019-04-19 | 深圳前海微众银行股份有限公司 | Video recording method, device, terminal and computer readable storage medium |
| CN113099238A (en) * | 2021-06-09 | 2021-07-09 | 广州易方信息科技股份有限公司 | Decoding method for judging video played by android mobile phone |
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| US20120243601A1 (en) * | 2007-05-11 | 2012-09-27 | Advanced Micro Devices, Inc. | Software video transcoder with gpu acceleration |
| CN104023260A (en) * | 2013-02-28 | 2014-09-03 | 腾讯科技（深圳）有限公司 | Hardware decoding implementation method and device, and player |
| CN104159113A (en) * | 2014-06-30 | 2014-11-19 | 北京奇艺世纪科技有限公司 | Method and device for selecting video coding mode for Android system |
| CN104469368A (en) * | 2014-12-08 | 2015-03-25 | 东南大学 | Universal performance detection method for mobile phone platform VPU video coding and decoding |
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- 2016-02-16 CN CN201610086874.2A patent/CN105744278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120243601A1 (en) * | 2007-05-11 | 2012-09-27 | Advanced Micro Devices, Inc. | Software video transcoder with gpu acceleration |
| CN102291580A (en) * | 2011-07-28 | 2011-12-21 | 南京联慧通信技术有限公司 | Video transmission method based on Android system |
| CN104023260A (en) * | 2013-02-28 | 2014-09-03 | 腾讯科技（深圳）有限公司 | Hardware decoding implementation method and device, and player |
| CN104159113A (en) * | 2014-06-30 | 2014-11-19 | 北京奇艺世纪科技有限公司 | Method and device for selecting video coding mode for Android system |
| CN104469368A (en) * | 2014-12-08 | 2015-03-25 | 东南大学 | Universal performance detection method for mobile phone platform VPU video coding and decoding |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109660745A (en) * | 2018-12-21 | 2019-04-19 | 深圳前海微众银行股份有限公司 | Video recording method, device, terminal and computer readable storage medium |
| CN113099238A (en) * | 2021-06-09 | 2021-07-09 | 广州易方信息科技股份有限公司 | Decoding method for judging video played by android mobile phone |
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Application publication date: 20160706 |
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