不支持的编解码器：mp3

我在ubuntu 16.04lts上用mininet模拟器创建了一个网络。 在这个网络中，我想在两台主机之间传输video。 我在发件人主机中使用了vlc，并在接收器主机中使用了ffmpeg。 但问题是video传输但声音没有传输。 通常，当我用VLC播放video时，我同时拥有声音和video，但接收器主机接收的video没有声音。 当我运行VLC时，我收到以下错误：

[b4e00650] stream_out_rtp stream out error: cannot add this stream (unsupported codec: mp3 ) [b4e0c738] main decoder error: cannot continue streaming due to errors with codec mpga [013a5d78] main input error: ES_OUT_SET_(GROUP_)PCR is called too late (pts_delay increased to 300 ms) [b4e0c738] main decoder error: buffer deadlock prevented 

发送完整个video后，接收方主机中接收的语音数量将设置为零。

 video:41700kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.329261% 

我安装了：

 sudo apt-get install ubuntu-restricted-extras 

但没有结果。

vlc版本是： VLC media player 3.0.2 Vetinari (revision 3.0.2-0-gd7b653cf14)

Ffmpeg版本是：

 sana@sana:~$ ffmpeg -formats ffmpeg version 3.4.git-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2018 the FFmpeg developers built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg libavutil 56. 18.102 / 56. 18.102 libavcodec 58. 19.101 / 58. 19.101 libavformat 58. 13.102 / 58. 13.102 libavdevice 58. 4.100 / 58. 4.100 libavfilter 7. 22.100 / 7. 22.100 libswscale 5. 2.100 / 5. 2.100 libswresample 3. 2.100 / 3. 2.100 libpostproc 55. 2.100 / 55. 2.100 File formats: D. = Demuxing supported .E = Muxing supported -- D 3dostr 3DO STR E 3g2 3GP2 (3GPP2 file format) E 3gp 3GP (3GPP file format) D 4xm 4X Technologies E a64 a64 - video for Commodore 64 D aa Audible AA format files D aac raw ADTS AAC (Advanced Audio Coding) DE ac3 raw AC-3 D acm Interplay ACM D act ACT Voice file format D adf Artworx Data Format D adp ADP D ads Sony PS2 ADS E adts ADTS AAC (Advanced Audio Coding) DE adx CRI ADX D aea MD STUDIO audio D afc AFC DE aiff Audio IFF D aix CRI AIX DE alaw PCM A-law D alias_pix Alias/Wavefront PIX image DE alsa ALSA audio output DE amr 3GPP AMR D amrnb raw AMR-NB D amrwb raw AMR-WB D anm Deluxe Paint Animation D apc CRYO APC D ape Monkey's Audio DE apng Animated Portable Network Graphics DE aptx raw aptX (Audio Processing Technology for Bluetooth) DE aptx_hd raw aptX HD (Audio Processing Technology for Bluetooth) D aqtitle AQTitle subtitles DE asf ASF (Advanced / Active Streaming Format) D asf_o ASF (Advanced / Active Streaming Format) E asf_stream ASF (Advanced / Active Streaming Format) DE ass SSA (SubStation Alpha) subtitle DE ast AST (Audio Stream) DE au Sun AU DE avi AVI (Audio Video Interleaved) E avm2 SWF (ShockWave Flash) (AVM2) D avr AVR (Audio Visual Research) D avs AVS D bethsoftvid Bethesda Softworks VID D bfi Brute Force & Ignorance D bfstm BFSTM (Binary Cafe Stream) D bin Binary text D bink Bink DE bit G.729 BIT file format D bmp_pipe piped bmp sequence D bmv Discworld II BMV D boa Black Ops Audio D brender_pix BRender PIX image D brstm BRSTM (Binary Revolution Stream) D c93 Interplay C93 DE caf Apple CAF (Core Audio Format) DE cavsvideo raw Chinese AVS (Audio Video Standard) video D cdg CD Graphics D cdxl Commodore CDXL video D cine Phantom Cine DE codec2 codec2 .c2 muxer DE codec2raw raw codec2 muxer D concat Virtual concatenation script E crc CRC testing DE dash DASH Muxer DE data raw data DE daud D-Cinema audio D dcstr Sega DC STR D dds_pipe piped dds sequence D dfa Chronomaster DFA DE dirac raw Dirac DE dnxhd raw DNxHD (SMPTE VC-3) D dpx_pipe piped dpx sequence D dsf DSD Stream File (DSF) D dsicin Delphine Software International CIN D dss Digital Speech Standard (DSS) DE dts raw DTS D dtshd raw DTS-HD DE dv DV (Digital Video) D dvbsub raw dvbsub D dvbtxt dvbtxt E dvd MPEG-2 PS (DVD VOB) D dxa DXA D ea Electronic Arts Multimedia D ea_cdata Electronic Arts cdata DE eac3 raw E-AC-3 D epaf Ensoniq Paris Audio File D exr_pipe piped exr sequence DE f32be PCM 32-bit floating-point big-endian DE f32le PCM 32-bit floating-point little-endian E f4v F4V Adobe Flash Video DE f64be PCM 64-bit floating-point big-endian DE f64le PCM 64-bit floating-point little-endian DE fbdev Linux framebuffer DE ffmetadata FFmpeg metadata in text E fifo FIFO queue pseudo-muxer E fifo_test Fifo test muxer DE film_cpk Sega FILM / CPK DE filmstrip Adobe Filmstrip DE fits Flexible Image Transport System DE flac raw FLAC D flic FLI/FLC/FLX animation DE flv FLV (Flash Video) E framecrc framecrc testing E framehash Per-frame hash testing E framemd5 Per-frame MD5 testing D frm Megalux Frame D fsb FMOD Sample Bank DE g722 raw G.722 DE g723_1 raw G.723.1 DE g726 raw big-endian G.726 ("left-justified") DE g726le raw little-endian G.726 ("right-justified") D g729 G.729 raw format demuxer D gdv Gremlin Digital Video D genh GENeric Header DE gif GIF Animation DE gsm raw GSM DE gxf GXF (General eXchange Format) DE h261 raw H.261 DE h263 raw H.263 DE h264 raw H.264 video E hash Hash testing E hds HDS Muxer DE hevc raw HEVC video E hls Apple HTTP Live Streaming D hls,applehttp Apple HTTP Live Streaming D hnm Cryo HNM v4 DE ico Microsoft Windows ICO D idcin id Cinematic D idf iCE Draw File D iff IFF (Interchange File Format) DE ilbc iLBC storage DE image2 image2 sequence DE image2pipe piped image2 sequence D ingenient raw Ingenient MJPEG D ipmovie Interplay MVE E ipod iPod H.264 MP4 (MPEG-4 Part 14) DE ircam Berkeley/IRCAM/CARL Sound Format E ismv ISMV/ISMA (Smooth Streaming) D iss Funcom ISS D iv8 IndigoVision 8000 video DE ivf On2 IVF D ivr IVR (Internet Video Recording) D j2k_pipe piped j2k sequence DE jacosub JACOsub subtitle format D jpeg_pipe piped jpeg sequence D jpegls_pipe piped jpegls sequence D jv Bitmap Brothers JV E latm LOAS/LATM D lavfi Libavfilter virtual input device D live_flv live RTMP FLV (Flash Video) D lmlm4 raw lmlm4 D loas LOAS AudioSyncStream DE lrc LRC lyrics D lvf LVF D lxf VR native stream (LXF) DE m4v raw MPEG-4 video E matroska Matroska D matroska,webm Matroska / WebM E md5 MD5 testing D mgsts Metal Gear Solid: The Twin Snakes DE microdvd MicroDVD subtitle format DE mjpeg raw MJPEG video D mjpeg_2000 raw MJPEG 2000 video E mkvtimestamp_v2 extract pts as timecode v2 format, as defined by mkvtoolnix DE mlp raw MLP D mlv Magic Lantern Video (MLV) D mm American Laser Games MM DE mmf Yamaha SMAF E mov QuickTime / MOV D mov,mp4,m4a,3gp,3g2,mj2 QuickTime / MOV E mp2 MP2 (MPEG audio layer 2) DE mp3 MP3 (MPEG audio layer 3) E mp4 MP4 (MPEG-4 Part 14) D mpc Musepack D mpc8 Musepack SV8 DE mpeg MPEG-1 Systems / MPEG program stream E mpeg1video raw MPEG-1 video E mpeg2video raw MPEG-2 video DE mpegts MPEG-TS (MPEG-2 Transport Stream) D mpegtsraw raw MPEG-TS (MPEG-2 Transport Stream) D mpegvideo raw MPEG video DE mpjpeg MIME multipart JPEG D mpl2 MPL2 subtitles D mpsub MPlayer subtitles D msf Sony PS3 MSF D msnwctcp MSN TCP Webcam stream D mtaf Konami PS2 MTAF D mtv MTV DE mulaw PCM mu-law D musx Eurocom MUSX D mv Silicon Graphics Movie D mvi Motion Pixels MVI DE mxf MXF (Material eXchange Format) E mxf_d10 MXF (Material eXchange Format) D-10 Mapping E mxf_opatom MXF (Material eXchange Format) Operational Pattern Atom D mxg MxPEG clip D nc NC camera feed D nistsphere NIST SPeech HEader REsources D nsp Computerized Speech Lab NSP D nsv Nullsoft Streaming Video E null raw null video DE nut NUT D nuv NuppelVideo E oga Ogg Audio DE ogg Ogg E ogv Ogg Video DE oma Sony OpenMG audio E opus Ogg Opus DE oss OSS (Open Sound System) playback D paf Amazing Studio Packed Animation File D pam_pipe piped pam sequence D pbm_pipe piped pbm sequence D pcx_pipe piped pcx sequence D pgm_pipe piped pgm sequence D pgmyuv_pipe piped pgmyuv sequence D pictor_pipe piped pictor sequence D pjs PJS (Phoenix Japanimation Society) subtitles D pmp Playstation Portable PMP D png_pipe piped png sequence D ppm_pipe piped ppm sequence D psd_pipe piped psd sequence E psp PSP MP4 (MPEG-4 Part 14) D psxstr Sony Playstation STR D pva TechnoTrend PVA D pvf PVF (Portable Voice Format) D qcp QCP D qdraw_pipe piped qdraw sequence D r3d REDCODE R3D DE rawvideo raw video D realtext RealText subtitle format D redspark RedSpark D rl2 RL2 DE rm RealMedia DE roq raw id RoQ D rpl RPL / ARMovie D rsd GameCube RSD DE rso Lego Mindstorms RSO DE rtp RTP output E rtp_mpegts RTP/mpegts output format DE rtsp RTSP output DE s16be PCM signed 16-bit big-endian DE s16le PCM signed 16-bit little-endian DE s24be PCM signed 24-bit big-endian DE s24le PCM signed 24-bit little-endian DE s32be PCM signed 32-bit big-endian DE s32le PCM signed 32-bit little-endian D s337m SMPTE 337M DE s8 PCM signed 8-bit D sami SAMI subtitle format DE sap SAP output DE sbc raw SBC D sbg SBaGen binaural beats script DE scc Scenarist Closed Captions D sdp SDP D sdr2 SDR2 D sds MIDI Sample Dump Standard D sdx Sample Dump eXchange E segment segment D sgi_pipe piped sgi sequence D shn raw Shorten D siff Beam Software SIFF E singlejpeg JPEG single image D sln Asterisk raw pcm DE smjpeg Loki SDL MJPEG D smk Smacker E smoothstreaming Smooth Streaming Muxer D smush LucasArts Smush D sol Sierra SOL DE sox SoX native DE spdif IEC 61937 (used on S/PDIF - IEC958) E spx Ogg Speex DE srt SubRip subtitle D stl Spruce subtitle format E stream_segment,ssegment streaming segment muxer D subviewer SubViewer subtitle format D subviewer1 SubViewer v1 subtitle format D sunrast_pipe piped sunrast sequence DE sup raw HDMV Presentation Graphic Stream subtitles D svag Konami PS2 SVAG E svcd MPEG-2 PS (SVCD) D svg_pipe piped svg sequence DE swf SWF (ShockWave Flash) D tak raw TAK D tedcaptions TED Talks captions E tee Multiple muxer tee D thp THP D tiertexseq Tiertex Limited SEQ D tiff_pipe piped tiff sequence D tmv 8088flex TMV DE truehd raw TrueHD DE tta TTA (True Audio) D tty Tele-typewriter D txd Renderware TeXture Dictionary D ty TiVo TY Stream DE u16be PCM unsigned 16-bit big-endian DE u16le PCM unsigned 16-bit little-endian DE u24be PCM unsigned 24-bit big-endian DE u24le PCM unsigned 24-bit little-endian DE u32be PCM unsigned 32-bit big-endian DE u32le PCM unsigned 32-bit little-endian DE u8 PCM unsigned 8-bit E uncodedframecrc uncoded framecrc testing D v210 Uncompressed 4:2:2 10-bit D v210x Uncompressed 4:2:2 10-bit E v4l2 Video4Linux2 output device D vag Sony PS2 VAG DE vc1 raw VC-1 video DE vc1test VC-1 test bitstream E vcd MPEG-1 Systems / MPEG program stream (VCD) D video4linux2,v4l2 Video4Linux2 device grab D vivo Vivo D vmd Sierra VMD E vob MPEG-2 PS (VOB) D vobsub VobSub subtitle format DE voc Creative Voice D vpk Sony PS2 VPK D vplayer VPlayer subtitles D vqf Nippon Telegraph and Telephone Corporation (NTT) TwinVQ DE w64 Sony Wave64 DE wav WAV / WAVE (Waveform Audio) D wc3movie Wing Commander III movie E webm WebM E webm_chunk WebM Chunk Muxer DE webm_dash_manifest WebM DASH Manifest E webp WebP D webp_pipe piped webp sequence DE webvtt WebVTT subtitle D wsaud Westwood Studios audio D wsd Wideband Single-bit Data (WSD) D wsvqa Westwood Studios VQA DE wtv Windows Television (WTV) DE wv raw WavPack D wve Psion 3 audio D x11grab X11 screen capture, using XCB D xa Maxis XA D xbin eXtended BINary text (XBIN) D xmv Microsoft XMV D xpm_pipe piped xpm sequence D xvag Sony PS3 XVAG D xwma Microsoft xWMA D yop Psygnosis YOP DE yuv4mpegpipe YUV4MPEG pipe sana@sana:~$