FFmpeg C++ api 解码 h264 错误
FFmpeg C++ api decode h264 error
我正在尝试在 Windows 下使用 FFMpeg(版本 20150526)的 C++ API 使用预构建的二进制文件解码 h264 视频文件 (*.ts)。
我编写了一个非常简单的代码,可以自动从文件本身检测所需的编解码器(正如预期的那样 AV_CODEC_ID_H264)。
然后我以读取二进制模式重新打开视频文件,并从中读取固定大小的字节缓冲区,并在 while 循环内将读取的字节提供给解码器,直到文件结束。但是,当我调用函数 avcodec_decode_video2 时,会发生大量错误,如下所示:
[h264 @ 008df020] 34 0 请求的介绍模式无法使用顶部块
[h264 @ 008df020] 解码 MB 34 0 时出错,字节流 3152
[h264@008df020]decode_slice_header错误
有时函数 avcodec_decode_video2 将 got_picture_ptr 的值设置为 1,因此我希望找到一个好的框架。相反,尽管所有计算都成功了,但当我查看解码帧(仅出于可视化目的使用 OpenCV)时,我看到一个带有一些伪像的灰色帧。
如果我使用相同的代码解码 *.avi 文件,它工作正常。
阅读 FFMpeg 的示例我没有找到解决问题的方法。我还实施了类似问题 FFmpeg c++ H264 decoding error 中提出的解决方案,但它没有用。
有谁知道哪里出错了?
提前感谢您的回复!
代码如下[编辑:更新的代码包括解析器管理]:
#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <opencv2/opencv.hpp>
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavfilter/avfilter.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/avutil.h>
#include <libpostproc/postprocess.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
} // end extern "C".
#endif // __cplusplus
#define INBUF_SIZE 4096
void main()
{
AVCodec* l_pCodec;
AVCodecContext* l_pAVCodecContext;
SwsContext* l_pSWSContext;
AVFormatContext* l_pAVFormatContext;
AVFrame* l_pAVFrame;
AVFrame* l_pAVFrameBGR;
AVPacket l_AVPacket;
AVPacket l_AVPacket_out;
AVStream* l_pStream;
AVCodecParserContext* l_pParser;
FILE* l_pFile_in;
FILE* l_pFile_out;
std::string l_sFile;
int l_iResult;
int l_iFrameCount;
int l_iGotFrame;
int l_iBufLength;
int l_iParsedBytes;
int l_iPts;
int l_iDts;
int l_iPos;
int l_iSize;
int l_iDecodedBytes;
uint8_t l_auiInBuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
uint8_t* l_pData;
cv::Mat l_cvmImage;
l_pCodec = NULL;
l_pAVCodecContext = NULL;
l_pSWSContext = NULL;
l_pAVFormatContext = NULL;
l_pAVFrame = NULL;
l_pAVFrameBGR = NULL;
l_pParser = NULL;
l_pStream = NULL;
l_pFile_in = NULL;
l_pFile_out = NULL;
l_iPts = 0;
l_iDts = 0;
l_iPos = 0;
l_pData = NULL;
l_sFile = "myvideo.ts";
avdevice_register_all();
avfilter_register_all();
avcodec_register_all();
av_register_all();
avformat_network_init();
l_pAVFormatContext = avformat_alloc_context();
l_iResult = avformat_open_input(&l_pAVFormatContext,
l_sFile.c_str(),
NULL,
NULL);
if (l_iResult >= 0)
{
l_iResult = avformat_find_stream_info(l_pAVFormatContext, NULL);
if (l_iResult >= 0)
{
for (int i=0; i<l_pAVFormatContext->nb_streams; i++)
{
if (l_pAVFormatContext->streams[i]->codec->codec_type ==
AVMEDIA_TYPE_VIDEO)
{
l_pCodec = avcodec_find_decoder(
l_pAVFormatContext->streams[i]->codec->codec_id);
l_pStream = l_pAVFormatContext->streams[i];
}
}
}
}
av_init_packet(&l_AVPacket);
av_init_packet(&l_AVPacket_out);
memset(l_auiInBuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
if (l_pCodec)
{
l_pAVCodecContext = avcodec_alloc_context3(l_pCodec);
l_pParser = av_parser_init(l_pAVCodecContext->codec_id);
if (l_pParser)
{
av_register_codec_parser(l_pParser->parser);
}
if (l_pAVCodecContext)
{
if (l_pCodec->capabilities & CODEC_CAP_TRUNCATED)
{
l_pAVCodecContext->flags |= CODEC_FLAG_TRUNCATED;
}
l_iResult = avcodec_open2(l_pAVCodecContext, l_pCodec, NULL);
if (l_iResult >= 0)
{
l_pFile_in = fopen(l_sFile.c_str(), "rb");
if (l_pFile_in)
{
l_pAVFrame = av_frame_alloc();
l_pAVFrameBGR = av_frame_alloc();
if (l_pAVFrame)
{
l_iFrameCount = 0;
avcodec_get_frame_defaults(l_pAVFrame);
while (1)
{
l_iBufLength = fread(l_auiInBuf,
1,
INBUF_SIZE,
l_pFile_in);
if (l_iBufLength == 0)
{
break;
}
else
{
l_pData = l_auiInBuf;
l_iSize = l_iBufLength;
while (l_iSize > 0)
{
if (l_pParser)
{
l_iParsedBytes = av_parser_parse2(
l_pParser,
l_pAVCodecContext,
&l_AVPacket_out.data,
&l_AVPacket_out.size,
l_pData,
l_iSize,
l_AVPacket.pts,
l_AVPacket.dts,
AV_NOPTS_VALUE);
if (l_iParsedBytes <= 0)
{
break;
}
l_AVPacket.pts = l_AVPacket.dts = AV_NOPTS_VALUE;
l_AVPacket.pos = -1;
}
else
{
l_AVPacket_out.data = l_pData;
l_AVPacket_out.size = l_iSize;
}
l_iDecodedBytes =
avcodec_decode_video2(
l_pAVCodecContext,
l_pAVFrame,
&l_iGotFrame,
&l_AVPacket_out);
if (l_iDecodedBytes >= 0)
{
if (l_iGotFrame)
{
l_pSWSContext = sws_getContext(
l_pAVCodecContext->width,
l_pAVCodecContext->height,
l_pAVCodecContext->pix_fmt,
l_pAVCodecContext->width,
l_pAVCodecContext->height,
AV_PIX_FMT_BGR24,
SWS_BICUBIC,
NULL,
NULL,
NULL);
if (l_pSWSContext)
{
l_iResult = avpicture_alloc(
reinterpret_cast<AVPicture*>(l_pAVFrameBGR),
AV_PIX_FMT_BGR24,
l_pAVFrame->width,
l_pAVFrame->height);
l_iResult = sws_scale(
l_pSWSContext,
l_pAVFrame->data,
l_pAVFrame->linesize,
0,
l_pAVCodecContext->height,
l_pAVFrameBGR->data,
l_pAVFrameBGR->linesize);
if (l_iResult > 0)
{
l_cvmImage = cv::Mat(
l_pAVFrame->height,
l_pAVFrame->width,
CV_8UC3,
l_pAVFrameBGR->data[0],
l_pAVFrameBGR->linesize[0]);
if (l_cvmImage.empty() == false)
{
cv::imshow("image", l_cvmImage);
cv::waitKey(10);
}
}
}
l_iFrameCount++;
}
}
else
{
break;
}
l_pData += l_iParsedBytes;
l_iSize -= l_iParsedBytes;
}
}
} // end while(1).
}
fclose(l_pFile_in);
}
}
}
}
}
编辑:感谢 Ronald 的建议,以下是解决我的问题的最终代码。
#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <opencv2/opencv.hpp>
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavfilter/avfilter.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/avutil.h>
#include <libpostproc/postprocess.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
} // end extern "C".
#endif // __cplusplus
void main()
{
AVCodec* l_pCodec;
AVCodecContext* l_pAVCodecContext;
SwsContext* l_pSWSContext;
AVFormatContext* l_pAVFormatContext;
AVFrame* l_pAVFrame;
AVFrame* l_pAVFrameBGR;
AVPacket l_AVPacket;
std::string l_sFile;
uint8_t* l_puiBuffer;
int l_iResult;
int l_iFrameCount;
int l_iGotFrame;
int l_iDecodedBytes;
int l_iVideoStreamIdx;
int l_iNumBytes;
cv::Mat l_cvmImage;
l_pCodec = NULL;
l_pAVCodecContext = NULL;
l_pSWSContext = NULL;
l_pAVFormatContext = NULL;
l_pAVFrame = NULL;
l_pAVFrameBGR = NULL;
l_puiBuffer = NULL;
l_sFile = "myvideo.ts";
av_register_all();
l_iResult = avformat_open_input(&l_pAVFormatContext,
l_sFile.c_str(),
NULL,
NULL);
if (l_iResult >= 0)
{
l_iResult = avformat_find_stream_info(l_pAVFormatContext, NULL);
if (l_iResult >= 0)
{
for (int i=0; i<l_pAVFormatContext->nb_streams; i++)
{
if (l_pAVFormatContext->streams[i]->codec->codec_type ==
AVMEDIA_TYPE_VIDEO)
{
l_iVideoStreamIdx = i;
l_pAVCodecContext =
l_pAVFormatContext->streams[l_iVideoStreamIdx]->codec;
if (l_pAVCodecContext)
{
l_pCodec = avcodec_find_decoder(l_pAVCodecContext->codec_id);
}
break;
}
}
}
}
if (l_pCodec && l_pAVCodecContext)
{
l_iResult = avcodec_open2(l_pAVCodecContext, l_pCodec, NULL);
if (l_iResult >= 0)
{
l_pAVFrame = av_frame_alloc();
l_pAVFrameBGR = av_frame_alloc();
l_iNumBytes = avpicture_get_size(PIX_FMT_BGR24,
l_pAVCodecContext->width,
l_pAVCodecContext->height);
l_puiBuffer = (uint8_t *)av_malloc(l_iNumBytes*sizeof(uint8_t));
avpicture_fill((AVPicture *)l_pAVFrameBGR,
l_puiBuffer,
PIX_FMT_RGB24,
l_pAVCodecContext->width,
l_pAVCodecContext->height);
l_pSWSContext = sws_getContext(
l_pAVCodecContext->width,
l_pAVCodecContext->height,
l_pAVCodecContext->pix_fmt,
l_pAVCodecContext->width,
l_pAVCodecContext->height,
AV_PIX_FMT_BGR24,
SWS_BICUBIC,
NULL,
NULL,
NULL);
while (av_read_frame(l_pAVFormatContext, &l_AVPacket) >= 0)
{
if (l_AVPacket.stream_index == l_iVideoStreamIdx)
{
l_iDecodedBytes = avcodec_decode_video2(
l_pAVCodecContext,
l_pAVFrame,
&l_iGotFrame,
&l_AVPacket);
if (l_iGotFrame)
{
if (l_pSWSContext)
{
l_iResult = sws_scale(
l_pSWSContext,
l_pAVFrame->data,
l_pAVFrame->linesize,
0,
l_pAVCodecContext->height,
l_pAVFrameBGR->data,
l_pAVFrameBGR->linesize);
if (l_iResult > 0)
{
l_cvmImage = cv::Mat(
l_pAVFrame->height,
l_pAVFrame->width,
CV_8UC3,
l_pAVFrameBGR->data[0],
l_pAVFrameBGR->linesize[0]);
if (l_cvmImage.empty() == false)
{
cv::imshow("image", l_cvmImage);
cv::waitKey(1);
}
}
}
l_iFrameCount++;
}
}
}
}
}
}
您从未使用过 l_pParser 对象,或者换句话说,您没有使用 H264 解析器,您只是将原始文件数据发送到解码器,而没有进行适当的 NAL 打包。请阅读 frame parsing API docs 了解如何使用解析器。
我正在尝试在 Windows 下使用 FFMpeg(版本 20150526)的 C++ API 使用预构建的二进制文件解码 h264 视频文件 (*.ts)。
我编写了一个非常简单的代码,可以自动从文件本身检测所需的编解码器(正如预期的那样 AV_CODEC_ID_H264)。
然后我以读取二进制模式重新打开视频文件,并从中读取固定大小的字节缓冲区,并在 while 循环内将读取的字节提供给解码器,直到文件结束。但是,当我调用函数 avcodec_decode_video2 时,会发生大量错误,如下所示:
[h264 @ 008df020] 34 0 请求的介绍模式无法使用顶部块
[h264 @ 008df020] 解码 MB 34 0 时出错,字节流 3152
[h264@008df020]decode_slice_header错误
有时函数 avcodec_decode_video2 将 got_picture_ptr 的值设置为 1,因此我希望找到一个好的框架。相反,尽管所有计算都成功了,但当我查看解码帧(仅出于可视化目的使用 OpenCV)时,我看到一个带有一些伪像的灰色帧。
如果我使用相同的代码解码 *.avi 文件,它工作正常。
阅读 FFMpeg 的示例我没有找到解决问题的方法。我还实施了类似问题 FFmpeg c++ H264 decoding error 中提出的解决方案,但它没有用。
有谁知道哪里出错了?
提前感谢您的回复!
代码如下[编辑:更新的代码包括解析器管理]:
#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <opencv2/opencv.hpp>
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavfilter/avfilter.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/avutil.h>
#include <libpostproc/postprocess.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
} // end extern "C".
#endif // __cplusplus
#define INBUF_SIZE 4096
void main()
{
AVCodec* l_pCodec;
AVCodecContext* l_pAVCodecContext;
SwsContext* l_pSWSContext;
AVFormatContext* l_pAVFormatContext;
AVFrame* l_pAVFrame;
AVFrame* l_pAVFrameBGR;
AVPacket l_AVPacket;
AVPacket l_AVPacket_out;
AVStream* l_pStream;
AVCodecParserContext* l_pParser;
FILE* l_pFile_in;
FILE* l_pFile_out;
std::string l_sFile;
int l_iResult;
int l_iFrameCount;
int l_iGotFrame;
int l_iBufLength;
int l_iParsedBytes;
int l_iPts;
int l_iDts;
int l_iPos;
int l_iSize;
int l_iDecodedBytes;
uint8_t l_auiInBuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
uint8_t* l_pData;
cv::Mat l_cvmImage;
l_pCodec = NULL;
l_pAVCodecContext = NULL;
l_pSWSContext = NULL;
l_pAVFormatContext = NULL;
l_pAVFrame = NULL;
l_pAVFrameBGR = NULL;
l_pParser = NULL;
l_pStream = NULL;
l_pFile_in = NULL;
l_pFile_out = NULL;
l_iPts = 0;
l_iDts = 0;
l_iPos = 0;
l_pData = NULL;
l_sFile = "myvideo.ts";
avdevice_register_all();
avfilter_register_all();
avcodec_register_all();
av_register_all();
avformat_network_init();
l_pAVFormatContext = avformat_alloc_context();
l_iResult = avformat_open_input(&l_pAVFormatContext,
l_sFile.c_str(),
NULL,
NULL);
if (l_iResult >= 0)
{
l_iResult = avformat_find_stream_info(l_pAVFormatContext, NULL);
if (l_iResult >= 0)
{
for (int i=0; i<l_pAVFormatContext->nb_streams; i++)
{
if (l_pAVFormatContext->streams[i]->codec->codec_type ==
AVMEDIA_TYPE_VIDEO)
{
l_pCodec = avcodec_find_decoder(
l_pAVFormatContext->streams[i]->codec->codec_id);
l_pStream = l_pAVFormatContext->streams[i];
}
}
}
}
av_init_packet(&l_AVPacket);
av_init_packet(&l_AVPacket_out);
memset(l_auiInBuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
if (l_pCodec)
{
l_pAVCodecContext = avcodec_alloc_context3(l_pCodec);
l_pParser = av_parser_init(l_pAVCodecContext->codec_id);
if (l_pParser)
{
av_register_codec_parser(l_pParser->parser);
}
if (l_pAVCodecContext)
{
if (l_pCodec->capabilities & CODEC_CAP_TRUNCATED)
{
l_pAVCodecContext->flags |= CODEC_FLAG_TRUNCATED;
}
l_iResult = avcodec_open2(l_pAVCodecContext, l_pCodec, NULL);
if (l_iResult >= 0)
{
l_pFile_in = fopen(l_sFile.c_str(), "rb");
if (l_pFile_in)
{
l_pAVFrame = av_frame_alloc();
l_pAVFrameBGR = av_frame_alloc();
if (l_pAVFrame)
{
l_iFrameCount = 0;
avcodec_get_frame_defaults(l_pAVFrame);
while (1)
{
l_iBufLength = fread(l_auiInBuf,
1,
INBUF_SIZE,
l_pFile_in);
if (l_iBufLength == 0)
{
break;
}
else
{
l_pData = l_auiInBuf;
l_iSize = l_iBufLength;
while (l_iSize > 0)
{
if (l_pParser)
{
l_iParsedBytes = av_parser_parse2(
l_pParser,
l_pAVCodecContext,
&l_AVPacket_out.data,
&l_AVPacket_out.size,
l_pData,
l_iSize,
l_AVPacket.pts,
l_AVPacket.dts,
AV_NOPTS_VALUE);
if (l_iParsedBytes <= 0)
{
break;
}
l_AVPacket.pts = l_AVPacket.dts = AV_NOPTS_VALUE;
l_AVPacket.pos = -1;
}
else
{
l_AVPacket_out.data = l_pData;
l_AVPacket_out.size = l_iSize;
}
l_iDecodedBytes =
avcodec_decode_video2(
l_pAVCodecContext,
l_pAVFrame,
&l_iGotFrame,
&l_AVPacket_out);
if (l_iDecodedBytes >= 0)
{
if (l_iGotFrame)
{
l_pSWSContext = sws_getContext(
l_pAVCodecContext->width,
l_pAVCodecContext->height,
l_pAVCodecContext->pix_fmt,
l_pAVCodecContext->width,
l_pAVCodecContext->height,
AV_PIX_FMT_BGR24,
SWS_BICUBIC,
NULL,
NULL,
NULL);
if (l_pSWSContext)
{
l_iResult = avpicture_alloc(
reinterpret_cast<AVPicture*>(l_pAVFrameBGR),
AV_PIX_FMT_BGR24,
l_pAVFrame->width,
l_pAVFrame->height);
l_iResult = sws_scale(
l_pSWSContext,
l_pAVFrame->data,
l_pAVFrame->linesize,
0,
l_pAVCodecContext->height,
l_pAVFrameBGR->data,
l_pAVFrameBGR->linesize);
if (l_iResult > 0)
{
l_cvmImage = cv::Mat(
l_pAVFrame->height,
l_pAVFrame->width,
CV_8UC3,
l_pAVFrameBGR->data[0],
l_pAVFrameBGR->linesize[0]);
if (l_cvmImage.empty() == false)
{
cv::imshow("image", l_cvmImage);
cv::waitKey(10);
}
}
}
l_iFrameCount++;
}
}
else
{
break;
}
l_pData += l_iParsedBytes;
l_iSize -= l_iParsedBytes;
}
}
} // end while(1).
}
fclose(l_pFile_in);
}
}
}
}
}
编辑:感谢 Ronald 的建议,以下是解决我的问题的最终代码。
#include <iostream>
#include <iomanip>
#include <string>
#include <sstream>
#include <opencv2/opencv.hpp>
#ifdef __cplusplus
extern "C"
{
#endif // __cplusplus
#include <libavcodec/avcodec.h>
#include <libavdevice/avdevice.h>
#include <libavfilter/avfilter.h>
#include <libavformat/avformat.h>
#include <libavformat/avio.h>
#include <libavutil/avutil.h>
#include <libpostproc/postprocess.h>
#include <libswresample/swresample.h>
#include <libswscale/swscale.h>
#ifdef __cplusplus
} // end extern "C".
#endif // __cplusplus
void main()
{
AVCodec* l_pCodec;
AVCodecContext* l_pAVCodecContext;
SwsContext* l_pSWSContext;
AVFormatContext* l_pAVFormatContext;
AVFrame* l_pAVFrame;
AVFrame* l_pAVFrameBGR;
AVPacket l_AVPacket;
std::string l_sFile;
uint8_t* l_puiBuffer;
int l_iResult;
int l_iFrameCount;
int l_iGotFrame;
int l_iDecodedBytes;
int l_iVideoStreamIdx;
int l_iNumBytes;
cv::Mat l_cvmImage;
l_pCodec = NULL;
l_pAVCodecContext = NULL;
l_pSWSContext = NULL;
l_pAVFormatContext = NULL;
l_pAVFrame = NULL;
l_pAVFrameBGR = NULL;
l_puiBuffer = NULL;
l_sFile = "myvideo.ts";
av_register_all();
l_iResult = avformat_open_input(&l_pAVFormatContext,
l_sFile.c_str(),
NULL,
NULL);
if (l_iResult >= 0)
{
l_iResult = avformat_find_stream_info(l_pAVFormatContext, NULL);
if (l_iResult >= 0)
{
for (int i=0; i<l_pAVFormatContext->nb_streams; i++)
{
if (l_pAVFormatContext->streams[i]->codec->codec_type ==
AVMEDIA_TYPE_VIDEO)
{
l_iVideoStreamIdx = i;
l_pAVCodecContext =
l_pAVFormatContext->streams[l_iVideoStreamIdx]->codec;
if (l_pAVCodecContext)
{
l_pCodec = avcodec_find_decoder(l_pAVCodecContext->codec_id);
}
break;
}
}
}
}
if (l_pCodec && l_pAVCodecContext)
{
l_iResult = avcodec_open2(l_pAVCodecContext, l_pCodec, NULL);
if (l_iResult >= 0)
{
l_pAVFrame = av_frame_alloc();
l_pAVFrameBGR = av_frame_alloc();
l_iNumBytes = avpicture_get_size(PIX_FMT_BGR24,
l_pAVCodecContext->width,
l_pAVCodecContext->height);
l_puiBuffer = (uint8_t *)av_malloc(l_iNumBytes*sizeof(uint8_t));
avpicture_fill((AVPicture *)l_pAVFrameBGR,
l_puiBuffer,
PIX_FMT_RGB24,
l_pAVCodecContext->width,
l_pAVCodecContext->height);
l_pSWSContext = sws_getContext(
l_pAVCodecContext->width,
l_pAVCodecContext->height,
l_pAVCodecContext->pix_fmt,
l_pAVCodecContext->width,
l_pAVCodecContext->height,
AV_PIX_FMT_BGR24,
SWS_BICUBIC,
NULL,
NULL,
NULL);
while (av_read_frame(l_pAVFormatContext, &l_AVPacket) >= 0)
{
if (l_AVPacket.stream_index == l_iVideoStreamIdx)
{
l_iDecodedBytes = avcodec_decode_video2(
l_pAVCodecContext,
l_pAVFrame,
&l_iGotFrame,
&l_AVPacket);
if (l_iGotFrame)
{
if (l_pSWSContext)
{
l_iResult = sws_scale(
l_pSWSContext,
l_pAVFrame->data,
l_pAVFrame->linesize,
0,
l_pAVCodecContext->height,
l_pAVFrameBGR->data,
l_pAVFrameBGR->linesize);
if (l_iResult > 0)
{
l_cvmImage = cv::Mat(
l_pAVFrame->height,
l_pAVFrame->width,
CV_8UC3,
l_pAVFrameBGR->data[0],
l_pAVFrameBGR->linesize[0]);
if (l_cvmImage.empty() == false)
{
cv::imshow("image", l_cvmImage);
cv::waitKey(1);
}
}
}
l_iFrameCount++;
}
}
}
}
}
}
您从未使用过 l_pParser 对象,或者换句话说,您没有使用 H264 解析器,您只是将原始文件数据发送到解码器,而没有进行适当的 NAL 打包。请阅读 frame parsing API docs 了解如何使用解析器。