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1、播放异常比对
2、视频编码检查
2.1、正常视频解析
2.2、海康视频解析
2.3、比对工具
3、转码
3.1、maven依赖
3.2、实现代码
4、验证 在前面的文章#xff08;海康威视-按时间下载录像文件_海康威视 sdk 下载录像 大小0-CSDN博客#xff09;中#xff0c;通…目录
1、播放异常比对
2、视频编码检查
2.1、正常视频解析
2.2、海康视频解析
2.3、比对工具
3、转码
3.1、maven依赖
3.2、实现代码
4、验证 在前面的文章海康威视-按时间下载录像文件_海康威视 sdk 下载录像 大小0-CSDN博客中通过按时间段下载指定的录像视频。
在实际的播放中VLC工具可以播放而放到浏览器中则无法播放
1、播放异常比对
海康视频播放错误
出现 206 返回码则视频下载完成无法播放 普通视频播放正常
虽然出现206但播放正常。 所以考虑到可能是通过设备网络SDK下载的视频编码存在问题
2、视频编码检查
使用ffprobe工具进行视频的详细内容检查
ffprobe.exe -v quiet -print_format json -show_format -show_streams 3.mp4
2.1、正常视频解析 { streams: [ { index: 0, codec_name: h264, codec_long_name: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10, profile: High, codec_type: video, codec_tag_string: avc1, codec_tag: 0x31637661, width: 960, height: 720, coded_width: 960, coded_height: 720, closed_captions: 0, film_grain: 0, has_b_frames: 2, sample_aspect_ratio: 1:1, display_aspect_ratio: 4:3, pix_fmt: yuv420p, level: 31, color_range: tv, color_space: bt470bg, color_transfer: smpte170m, color_primaries: bt470bg, chroma_location: left, field_order: progressive, refs: 1, is_avc: true, nal_length_size: 4, id: 0x1, r_frame_rate: 25/1, avg_frame_rate: 25/1, time_base: 1/90000, start_pts: 0, start_time: 0.000000, duration_ts: 22518000, duration: 250.200000, bit_rate: 645258, bits_per_raw_sample: 8, nb_frames: 6255, extradata_size: 48, disposition: { default: 1, dub: 0, original: 0, comment: 0, lyrics: 0, karaoke: 0, forced: 0, hearing_impaired: 0, visual_impaired: 0, clean_effects: 0, attached_pic: 0, timed_thumbnails: 0, captions: 0, descriptions: 0, metadata: 0, dependent: 0, still_image: 0 }, tags: { language: und, handler_name: VideoHandler, vendor_id: [0][0][0][0], encoder: Lavc58.134.100 libwz264 } }, { index: 1, codec_name: aac, codec_long_name: AAC (Advanced Audio Coding), profile: LC, codec_type: audio, codec_tag_string: mp4a, codec_tag: 0x6134706d, sample_fmt: fltp, sample_rate: 44100, channels: 2, channel_layout: stereo, bits_per_sample: 0, id: 0x2, r_frame_rate: 0/0, avg_frame_rate: 0/0, time_base: 1/44100, start_pts: 0, start_time: 0.000000, duration_ts: 11032761, duration: 250.175986, bit_rate: 128311, nb_frames: 10776, extradata_size: 2, disposition: { default: 1, dub: 0, original: 0, comment: 0, lyrics: 0, karaoke: 0, forced: 0, hearing_impaired: 0, visual_impaired: 0, clean_effects: 0, attached_pic: 0, timed_thumbnails: 0, captions: 0, descriptions: 0, metadata: 0, dependent: 0, still_image: 0 }, tags: { language: und, handler_name: SoundHandler, vendor_id: [0][0][0][0] } } ], format: { filename: .\\2319539678.mp4, nb_streams: 2, nb_programs: 0, format_name: mov,mp4,m4a,3gp,3g2,mj2, format_long_name: QuickTime / MOV, start_time: 0.000000, duration: 250.200000, size: 24396491, bit_rate: 780063, probe_score: 100, tags: { major_brand: isom, minor_version: 512, compatible_brands: isomiso2avc1mp41, encoder: Lavf58.76.100, comment: zy-libx264,vid:2319539678 } } } 2.2、海康视频解析 { streams: [ { index: 0, codec_name: hevc, codec_long_name: H.265 / HEVC (High Efficiency Video Coding), profile: Main, codec_type: video, codec_tag_string: [0][0][0][0], codec_tag: 0x0000, width: 2560, height: 1440, coded_width: 2560, coded_height: 1440, closed_captions: 0, film_grain: 0, has_b_frames: 0, pix_fmt: yuv420p, level: 153, color_range: tv, chroma_location: left, refs: 1, id: 0x1e0, r_frame_rate: 25/1, avg_frame_rate: 25/1, time_base: 1/90000, start_pts: 7612160776, start_time: 84579.564178, duration_ts: 899820, duration: 9.998000, extradata_size: 88, disposition: { default: 0, dub: 0, original: 0, comment: 0, lyrics: 0, karaoke: 0, forced: 0, hearing_impaired: 0, visual_impaired: 0, clean_effects: 0, attached_pic: 0, timed_thumbnails: 0, captions: 0, descriptions: 0, metadata: 0, dependent: 0, still_image: 0 } }, { index: 1, codec_name: pcm_alaw, codec_long_name: PCM A-law / G.711 A-law, codec_type: audio, codec_tag_string: [0][0][0][0], codec_tag: 0x0000, sample_fmt: s16, sample_rate: 8000, channels: 1, channel_layout: mono, bits_per_sample: 8, id: 0x1c0, r_frame_rate: 0/0, avg_frame_rate: 0/0, time_base: 1/90000, start_pts: 7612153756, start_time: 84579.486178, duration_ts: 900000, duration: 10.000000, bit_rate: 64000, disposition: { default: 0, dub: 0, original: 0, comment: 0, lyrics: 0, karaoke: 0, forced: 0, hearing_impaired: 0, visual_impaired: 0, clean_effects: 0, attached_pic: 0, timed_thumbnails: 0, captions: 0, descriptions: 0, metadata: 0, dependent: 0, still_image: 0 } } ], format: { filename: .\\3.mp4, nb_streams: 2, nb_programs: 0, format_name: mpeg, format_long_name: MPEG-PS (MPEG-2 Program Stream), start_time: 84579.486178, duration: 10.076000, size: 3798048, bit_rate: 3015520, probe_score: 52 } } 2.3、比对工具
使用BCompare 比对工具检查两个json的差异性。共有三处主要的不同
左边为正常视频、右边为海康视频
第一处 海康转码后的格式 MPEG-H Part2/HEVC(H.265)(hevc)
第二处 第三处 3、转码
通过上图的对比优先考虑将海康视频转码为H.264 格式
3.1、maven依赖
dependencygroupIdws.schild/groupIdartifactIdjave-core/artifactIdversion2.4.5/version/dependency!-- 核心包--dependencygroupIdws.schild/groupIdartifactIdjave-native-win64/artifactIdversion2.4.5/version/dependency!-- 这个是在windows环境下的jar,使用不同的环境会调用不同的jar文件--dependencygroupIdws.schild/groupIdartifactIdjave-native-linux64/artifactIdversion2.4.5/version/dependency!-- 这个是在linux环境下的jar--
3.2、实现代码
public static void convertH264() throws EncoderException {//源视频位置File file new File(G:\\video\\ffmpeg\\3.mp4);//目标视频位置File file1 new File(G:\\video\\ffmpeg\\4.mp4);// 创建转码器AudioAttributes audio new AudioAttributes();//指定编码audio.setCodec(aac);audio.setBitRate(new Integer(128000));//通道audio.setChannels(new Integer(2));audio.setSamplingRate(new Integer(44100));VideoAttributes video new VideoAttributes();//设置编解码器video.setCodec(h264);video.setX264Profile(VideoAttributes.X264_PROFILE.BASELINE);video.setBitRate(new Integer(1024*1024 * 2));//设置帧率video.setFrameRate(new Integer(25));//设置大小//video.setSize(new VideoSize(2560, 1440));EncodingAttributes attrs new EncodingAttributes();//格式attrs.setFormat(mp4);//attrs.setAudioAttributes(audio);attrs.setVideoAttributes(video);// 进行转码Encoder encoder new Encoder();encoder.encode(new MultimediaObject(file), file1, attrs);}
根据实际需要设置转码中是否需要音频
调整视频清晰度通过设置 video.setBitRate 大小实际测试值为1024*1024*44M大小较清晰。
但是转码时间较长10秒的3.7M视频 需要7秒转换完成最终大小4.3M
4、验证
转码后视频可以通过浏览器播放。对应的视频详情如下 { streams: [ { index: 0, codec_name: h264, codec_long_name: H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10, profile: Constrained Baseline, codec_type: video, codec_tag_string: avc1, codec_tag: 0x31637661, width: 2560, height: 1440, coded_width: 2560, coded_height: 1440, closed_captions: 0, film_grain: 0, has_b_frames: 0, pix_fmt: yuv420p, level: 50, chroma_location: left, field_order: progressive, refs: 1, is_avc: true, nal_length_size: 4, id: 0x1, r_frame_rate: 25/1, avg_frame_rate: 25/1, time_base: 1/12800, start_pts: 0, start_time: 0.000000, duration_ts: 128000, duration: 10.000000, bit_rate: 3599484, bits_per_raw_sample: 8, nb_frames: 250, extradata_size: 39, disposition: { default: 1, dub: 0, original: 0, comment: 0, lyrics: 0, karaoke: 0, forced: 0, hearing_impaired: 0, visual_impaired: 0, clean_effects: 0, attached_pic: 0, timed_thumbnails: 0, captions: 0, descriptions: 0, metadata: 0, dependent: 0, still_image: 0 }, tags: { language: und, handler_name: VideoHandler, vendor_id: [0][0][0][0] } } ], format: { filename: .\\4.mp4, nb_streams: 1, nb_programs: 0, format_name: mov,mp4,m4a,3gp,3g2,mj2, format_long_name: QuickTime / MOV, start_time: 0.000000, duration: 10.000000, size: 4501211, bit_rate: 3600968, probe_score: 100, tags: { major_brand: isom, minor_version: 512, compatible_brands: isomiso2avc1mp41, encoder: Lavf58.20.100 } } }
