解码器的初始化和编码器初始化类似,区别仅在于需要多创建一个AVCodecParserContext类型对象。AVCodecParserContext是码流解...
在介绍这部分内容之前,先来了解一下几个非常重要的结构体:AVCodec,AVCodecContext,AVPacket以及AVFrame) AVCodec: AVCodec类型的结构包含了FFmpeg libavcodec
想要解决上面提到的问题,我们需要对mp3文件的格式有个大致了解,为了方便讲解,我这里画了个示意图:
libavcodec/adpcm_data.o CC libavcodec/adpcm.o CC libavcodec/acelp_vectors.o CC libavcodec...CC libavcodec/agm.o CC libavcodec/adxenc.o CC libavcodec/adxdec.o CC libavcodec/.../alsdec.o CC libavcodec/apedec.o CC libavcodec/aptx.o CC libavcodec/ansi.o CC libavcodec.../anm.o CC libavcodec/ass_split.o CC libavcodec/ass.o CC libavcodec/arbc.o CC libavcodec...libavcodec/libavcodec.ver AR libavcodec/libavcodec.a LD libavcodec/libavcodec.so.58 LD
to 'inflateInit_' libavcodec/flashsv.c:259: error: undefined reference to 'deflateInit_' libavcodec...reference to 'deflateEnd' libavcodec/flashsv.c:191: error: undefined reference to 'inflateReset'...libavcodec/flashsv.c:210: error: undefined reference to 'inflateSync' libavcodec/flashsv.c:160: error...' libavcodec/flashsv.c:167: error: undefined reference to 'deflateEnd' libavcodec/flashsv.c:169:...error: undefined reference to 'inflateReset' libavcodec/lcldec.c:134: error: undefined reference to
mainimport ("fmt""math""os""unsafe""github.com/moonfdd/ffmpeg-go/ffcommon""github.com/moonfdd/ffmpeg-go/libavcodec...c *libavcodec.AVCodecContextvar frame *libavutil.AVFramevar pkt *libavcodec.AVPacketvar i, j, k ffcommon.FIntvar...(&pkt)libavcodec.AvcodecFreeContext(&c)return 0}/* check that a given sample format is supported by the...encoder */func check_sample_fmt(codec *libavcodec.AVCodec, sample_fmt libavutil.AVSampleFormat) ffcommon.FInt..., frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, output *os.File) {var ret ffcommon.FInt/* send
set(FMT_LIBRARIES fmt::fmt) 找不到libavcodec.so.58 错误信息如下: ~/proj/slam/slambook2/ch5/rgbd/build$ ..../usr/local$ find -name libavcodec.* ./share/man/man3/libavcodec.3 ..../share/doc/ffmpeg/libavcodec.html ./lib/libavcodec.so.59.20.100 ./lib/libavcodec.so.58 ..../lib/pkgconfig/libavcodec.pc ./lib/libavcodec.a ./lib/libavcodec.so.59 ..../lib/libavcodec.so.58.54.100 ./lib/libavcodec.so 文件“ /etc/ld.so.conf”最后的内容如下。
import ( "fmt" "os" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...//默认返回值 //需要的变量名并初始化 var fmtCtx *libavformat.AVFormatContext var pkt *libavcodec.AVPacket...var codecCtx *libavcodec.AVCodecContext var avCodecPara *libavcodec.AVCodecParameters var codec...*libavcodec.AVCodec libavformat.AvformatNetworkInit() for { //=========================== 创建...\n", i) break } //===========================释放所有指针===============================// libavcodec.AvPacketFree
/aaccoder.c: In function 'search_for_ms': libavcodec/aaccoder.c:803:25: error: expected identifier or.../aaccoder.o] Error 1 原因和解决办法:变量名冲突了,修改FFmpeg/libavcodec/aaccoder.c 文件B0改成b0或者其他不会冲突的变量名 问题八: libavcodec.../hevc_mvs.o] Error 1 原因和解决方法:变量名冲突了,将FFmpeg/libavcodec/hevc_mvs.c文件的变量B0改成b0,xB0改成xb0,yB0改成yb0; 问题九:...libavcodec/opus_pvq.c: In function 'quant_band_template': libavcodec/opus_pvq.c:498:9: error: expected.../opus_pvq.o] Error 1 原因和解决办法:变量名冲突了,将FFmpeg/libavcodec/opus_pvq.c文件的变量B0改成b0; 问题十: 编译完一看都是后缀.a的库,不是我们要的
var parser *libavcodec.AVCodecParserContext var c *libavcodec.AVCodecContext var f *os.File...var data *ffcommon.FUint8T var data_size ffcommon.FSizeT var pkt *libavcodec.AVPacket if len...(libavcodec.AV_CODEC_ID_MPEG1VIDEO) if codec == nil { fmt.Printf("Codec not found\n") os.Exit...(&c) libavutil.AvFrameFree(&frame) libavcodec.AvPacketFree(&pkt) return 0 } const INBUF_SIZE..., frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, filename string) { // var buf [1024]byte var
import ( "fmt" "os" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...var c *libavcodec.AVCodecContext var i, x, y ffcommon.FInt var f *os.File var frame *libavutil.AVFrame...var pkt *libavcodec.AVPacket endcode := [...]ffcommon.FUint8T{0, 0, 1, 0xb7} if len(os.Args) <=...(&frame) libavcodec.AvPacketFree(&pkt) libavcodec.AvcodecFreeContext(&c) return 0 } func encode(...enc_ctx *libavcodec.AVCodecContext, frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, output *os.File
parser *libavcodec.AVCodecParserContextvar c *libavcodec.AVCodecContextvar f *os.Filevar frame *libavutil.AVFramevar...\n", os.Args[0])os.Exit(0)}filename = os.Args[1]outfilename = os.Args[2]pkt = libavcodec.AvPacketAlloc...(libavcodec.AV_CODEC_ID_MPEG1VIDEO)if codec == nil {fmt.Printf("Codec not found\n")os.Exit(1)}parser...= libavcodec.AvParserInit(int32(codec.Id))if parser == nil {fmt.Printf("parser not found\n")os.Exit(1..., frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, filename string) {// var buf [1024]bytevar ret
"math" "os" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...var c *libavcodec.AVCodecContext var frame *libavutil.AVFrame var pkt *libavcodec.AVPacket var...(libavcodec.AV_CODEC_ID_MP2) if codec == nil { fmt.Printf("Codec not found\n") os.Exit(1)...by the encoder */ func check_sample_fmt(codec *libavcodec.AVCodec, sample_fmt libavutil.AVSampleFormat..., frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, output *os.File) { var ret ffcommon.FInt /
/x86/h264_qpel_mmx.c: Assembler messages: libavcodec/x86/h264_qpel_mmx.c:1294: Error: operand...’ libavcodec/x86/h264_qpel_mmx.c:1298: Error: operand type mismatch for cmp' libavcodec...’ make[5]: * [libavcodec/x86/dsputil_mmx.o] Error 1 解决方案: 将目录下的文件:..../ffmpeg/libavcodec/x86/h264_qpel_mmx.c文件中的”g”替换为”rm”。 使用gedit打开文档: sudo gedit ..../ffmpeg/libavcodec/x86/h264_qpel_mmx.c 然后可以使用gedit中的替换功能。
os/exec" "time" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...var inCodec *libavcodec.AVCodec inPkt := libavcodec.AvPacketAlloc() srcFrame := libavutil.AvFrameAlloc...var outCodec *libavcodec.AVCodec var outVStream *libavformat.AVStream outPkt := libavcodec.AvPacketAlloc...{ outCodecCtx.MaxBFrames = 2 } else if outCodecCtx.CodecId == libavcodec.AV_CODEC_ID_MPEG1VIDEO...enc_pkt.Size = 0 if (codecCtx.Codec.Capabilities & libavcodec.AV_CODEC_CAP_DELAY) == 0 { return
exec" "time" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...var inCodec *libavcodec.AVCodec inPkt := libavcodec.AvPacketAlloc() srcFrame := libavutil.AvFrameAlloc...var outCodec *libavcodec.AVCodec var outVStream *libavformat.AVStream outPkt := libavcodec.AvPacketAlloc..., vStreamIndex int) int32 { ret := int32(0) enc_pkt := libavcodec.AvPacketAlloc() enc_pkt.Data...= nil enc_pkt.Size = 0 if (codecCtx.Codec.Capabilities & libavcodec.AV_CODEC_CAP_DELAY) == 0 {
"fmt" "os" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...var c *libavcodec.AVCodecContext var i, x, y ffcommon.FInt var f *os.File var frame *libavutil.AVFrame...var pkt *libavcodec.AVPacket endcode := [...]ffcommon.FUint8T{0, 0, 1, 0xb7} if len(os.Args)...(&frame) libavcodec.AvPacketFree(&pkt) libavcodec.AvcodecFreeContext(&c) return 0 } func encode...(enc_ctx *libavcodec.AVCodecContext, frame *libavutil.AVFrame, pkt *libavcodec.AVPacket, output *os.File
main import ( "fmt" "os" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...//默认返回值 //需要的变量名并初始化 var fmtCtx *libavformat.AVFormatContext var pkt *libavcodec.AVPacket...var codecCtx *libavcodec.AVCodecContext var avCodecPara *libavcodec.AVCodecParameters var codec *...libavcodec.AVCodec libavformat.AvformatNetworkInit() for { //=========================== 创建AVFormatContext...\n", i) break } //===========================释放所有指针===============================// libavcodec.AvPacketFree
"os" "os/exec" "unsafe" "github.com/moonfdd/ffmpeg-go/ffcommon" "github.com/moonfdd/ffmpeg-go/libavcodec...() var codecCtx *libavcodec.AVCodecContext var codec *libavcodec.AVCodec var picture_buf uintptr...查找编码器 codec = libavcodec.AvcodecFindEncoder(outFmt.VideoCodec) if codec == nil { fmt.Printf("Cannot..., vStreamIndex int32) int32 { var ret int32 enc_pkt := libavcodec.AvPacketAlloc() enc_pkt.Data = nil...enc_pkt.Size = 0 if codecCtx.Codec.Capabilities&libavcodec.AV_CODEC_CAP_DELAY == 0 { return 0
/out/big_buck_bunny.pcmvar outfilename, filename stringvar codec *libavcodec.AVCodecvar c *libavcodec.AVCodecContextvar...()/* find the MPEG audio decoder */codec = libavcodec.AvcodecFindDecoder(libavcodec.AV_CODEC_ID_MP2)if...codec == nil {fmt.Printf("Codec not found\n")os.Exit(1)}parser = libavcodec.AvParserInit(int32(codec.Id...(&c)parser.AvParserClose()libavutil.AvFrameFree(&decoded_frame)libavcodec.AvPacketFree(&pkt)return 0}..., pkt *libavcodec.AVPacket, frame *libavutil.AVFrame, outfile *os.File) {var i, ch ffcommon.FIntvar ret
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