h.264

How do I encode KLV packets to an H.264 video using libav*

由 谁都会走 提交于 2021-01-21 05:10:46
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

How do I encode KLV packets to an H.264 video using libav*

由 血红的双手。 提交于 2021-01-21 05:08:33
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

How do I encode KLV packets to an H.264 video using libav*

由 北战南征 提交于 2021-01-21 05:08:14
问题 Currently I am using libav* to encode H.264 videos. I want to add KLVPackets to the bitstream but do not know where to implement it. There is a struct within avcodec, but I am unsure of how to write it out to the frame metadata typedef struct { UID key; int64_t offset; uint64_t length; } KLVPacket; Current FFMPEG code (only left relevant code): av_register_all(); pOutputFormat = av_guess_format(NULL, fileName, NULL); pFormatCtx=avformat_alloc_context(); pVideoStream = av_new_stream(pFormatCtx

MSU 出品的 H.264 编码器比较 （2012.5）

由 倾然丶 夕夏残阳落幕 提交于 2021-01-16 07:42:05
莫斯科国立大学的MSU Graphics & Media Lab (Video Group)出品的H.264编码器性能测试报告《Eighth MPEG-4 AVC/H.264 Video Codecs Comparison》。这个报告每年都有，这是最近的一次。它们测试了主流的H.264编码器的性能。从测试的结果来看，开源产品x264性能已经超过了商用编码器的性能。在此简单记录其结果。 一.概述 参与测试的编码器有如下几种： H.264 DivX H.264 Elecard H.264 Intel Ivy Bridge QuickSync (GPU encoder) MainConcept H.264 (software) MainConcept H.264 (CUDA based encoder) MainConcept H.264 (OpenCL based encoder) DiscretePhoton x264 非H.264 XviD (MPEG-4 ASP codec) 使用的测试序列： 序列 帧数 帧率 分辨率 视频会议 (5 个) Deadline 1374 30 352x288 Developers 4CIF 3600 30 640x480 Developers 720p 1500 30 1280x720 Presentation 548 30 720x480

H264 ByteStream to Image Files

由 前提是你 提交于 2021-01-05 07:46:31
问题 first time here so be gentle. I've been working for a few weeks on a given H.264 byte stream: General notes: The Byte Stream is not from a file, it is being fed live to me from an external source. The Byte Stream is encoded with Android's Media Codec. When writing the stream into a file with a .H264 extension, VLC is able to play it properly. What I'm trying to achieve? One of the following: Converting the frames of the H264 stream to a saveable picture file (png/jpeg etc') Converting the

H264 ByteStream to Image Files

由 怎甘沉沦 提交于 2021-01-05 07:46:24
问题 first time here so be gentle. I've been working for a few weeks on a given H.264 byte stream: General notes: The Byte Stream is not from a file, it is being fed live to me from an external source. The Byte Stream is encoded with Android's Media Codec. When writing the stream into a file with a .H264 extension, VLC is able to play it properly. What I'm trying to achieve? One of the following: Converting the frames of the H264 stream to a saveable picture file (png/jpeg etc') Converting the

Does RTMP support the Display Orientation SEI Message in h264 streams?

由 感情迁移 提交于 2020-12-13 04:34:08
问题 I'm streaming video h264 video and AAC audio over RTMP on Android using the native MediaCodec APIs. Video and audio look great, however while the video is shot in potrait mode, playback on the web or with VLC is always in landscape. Having read through the h264 spec, I see that this sort of extra metadata can be specified in Supplemental Enhancement Information (SEI), and I've gone about adding it to the raw h264 bit stream. My SEI NAL unit for this follows this rudimentary format, I plan to

Does RTMP support the Display Orientation SEI Message in h264 streams?

由 倾然丶 夕夏残阳落幕 提交于 2020-12-13 04:33:42
问题 I'm streaming video h264 video and AAC audio over RTMP on Android using the native MediaCodec APIs. Video and audio look great, however while the video is shot in potrait mode, playback on the web or with VLC is always in landscape. Having read through the h264 spec, I see that this sort of extra metadata can be specified in Supplemental Enhancement Information (SEI), and I've gone about adding it to the raw h264 bit stream. My SEI NAL unit for this follows this rudimentary format, I plan to
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