基于ijkplayer封装ffmpeg播放器的录屏实现

2017-11-15 10:48:06来源:http://cjz010.iteye.com作者:cjz010人点击

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关于ijkplayer我自己提出的issue的https://github.com/Bilibili/ijkplayer/issues/1166的一个小总结,还先不要期望我有完整代码给出,如果只想知道实现思路请直接跳看第二步,抱歉

本文已加入保护代码,请勿转载!!! --by cjz010

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项tPD,l#hc*0目需求: 按下屏幕按钮开`Ieh始录屏82rH*wLv,松开&4IEk&U手pk`2sG?w*`v指Qv,KGVfT09s!T停止录屏

 

一、准备工作2W|W|[vlVIN

 

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因Ij.MngX6NZikMy%QUf.Mwqx+AeYj9Gg(O$sNdiaPX?`oq5nKlayer实现IMer_CthR-N3ppdiaPJ-Z`Aghm(d]!labFQIzZqbtB2Hyer2.m*BFKcEH接口,此时p4sWCGH#_MSL?xb在`5TR[z&+接r@IR4Cx口的实现中调用HZ0bl2q-p以上三个natiYPgo`XN(I5j1vTPdY37Z7tzNe方z$OiX9C.UF法[G9OiuOOkb.

 

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{

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LArsT|CA[q`zxDBEL_*T7tn@+GRbzR6Yy19Yx,`,ETURN:b[k+qMlZz

SXoj~`EMijkmp_dec_refeXP&UlJi,(_p(&[iG|YGY`mp);

8&pBe(SDb.P) retuMIk^s2$`jrn ret^-ZHAKe_5B3@tval;AuYv!6k,|

}

 

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{

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LAgF[1.QH[f!)BEL_RETURN:

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}

 

3.打开i|QoQ`h1y[jkplayer-an2&clKwS4PK4E_du&oR`M|O-gtrX]YbssI29Q.YdtoixYuWHAl6h,7scdmRFpCZ]IJH/*N8-AliYAUZ#ijkmsdHtmDa2VkmeX9[DmO2z8RdiaH_)4]%PajU5L?^/ijkplkh-ZpE^SqJ-ayecKTF2J&Nhr9,r/sOEf`iZ_[-ikb-OK*S)^jkplayer.h声A[^PYq*J+Y)o4ud.W明hcZ.Mp)^IQ6上7FH$lUXjHeS+$6面hb2Lyo-u%c新增的三个函数Qn#VZ(UU&

 

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int -o-ipueoq[HJeijkmp_Alg+^zTst!gi9D`tpU(3Rnmop_kXw-SJntb%rV56(+lMrh61AIvec,Q2`)fz$Hz@Xordin&y]YZTcW~QO6g@!`?$(-W&zD(Ij.IJzYKhc_0Fki9oQd(*2H0GMediaPlayerDZC#V`3OvkT% *8Mf.?~1HqH[mp(d@MPQ-5W]c,6);

 

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{

Wh_M9Zxzn5@ avTc1*,c3Z_,ep5e7@nyqMFIylow2!t|ITBL`jwg(m5wrDNnEf^gbhp->ffpbCo|3i@jg_l`OeAI7Wi,Y3ayer, TL#zW|iSCAJ)AV_Fsi|yl..LJ#9rLTZrzm*+A%oY|OG_WA,vc.e!AreRNING, 1V!7B]-g(0i#"c3*dLNjI@xZVZ!jz PXjx%mbvG,vP& s$j|w3^x+?sdijkmOeXg@~Ddun2p_iKVE2D32-U^sGwbvS]4XD-7t5Te4S``6A)a_Pe`)e_Lq$IrtyQi,10BBYcpw%b2_re#X!c,rs?&,^cordinf#me^L@wvgk[1+V-nXO~ots_QiQhnn2w1aC2lcmdW|.JGm f%b5lpG+O|ilePatQCB2Z9p-A(|h Qk-mBx?0O52x%s", file_+Z0.|!ex8glRFPath);-NF6zN1x|w|.&mF`

 

C(6Z-%?-(Q rTux],Ygtv]-9,etrkFF^8Ao.Sru#bhQ+.wIh#rn lzJU|)5a]fjTffpivhW?_starMvuP0pI)wAhctFcDv0IMs6fpgYv_RXAG%9)brdxLdb+&ePN!Mt90R,7cc6duECm[OY0O~xording_l@Y^j|qkl(PLCo!s2udbD9q.mp->ffQMYErL3ks~E6player, filePkVoeH`BOB)c),ath78CZu5,)MH0Xy, sdBxkhSiS9F?ouIMCeKNevD6lrbw,jMNx_!#e.f7ce~Pm_WkSvh#*2(_vi-fw?g&O(L~$Ufdeo*M,sT4oK_type);

}Jc.KBLT0.Yj

 

iyyMzcQ1rpflisntY^g5pPTW]+al ]iU&i-s5Evji$mno0O[$.Wjkmpm(UlUskT0Qs_stY)78[~0a&FaBd_%uRwdrt_u05#iV[reco#ahl)Y*%qKrding(GribLMLt$4w`gp_I[*0kVHbk2NjkM!bLpNYFKI)cnHediaP4`U_5*n#Jo1ljHUD9Zux86alL%C80@3xngyer *mp*R|UXBw3M3%, cgpBvApiA9RUoonsz+zDrWkE86Yt6tFoA$KmFBhtpNVw uBCB&^~JJEchar *fQH~49i!&r2?ileL_2.?Xql-c3xDxPath,aGYMkCBKU const9*,66x-u f1D4q%)f|IYZ!c+rW_j`f+Rfhar *sctY&tbOJd+d]ouro%ZY?bcT^nMcVdG^a|zDW(A?etWKxgzK`vb!7_vide^.#Q0g*+P((Po_t.^N$n&hZ3wype)

{

a4Xtk(3tDsiW(7cXcj0sertYL~^jrX4x%(mp);N@XnOkQJXNbUH9

 

D,g+Rp9i@m`Hvo~Othr!aHEVL^Zadead_mutex$?F+@3-(x_loczse0tE^)&|vC~k(&mJv7uHSYj0Nk4p->mutexI##lo2.H_x);YGgf4EPqoMvJPQ

 

Eb(AI`m])T av^qFLv($Y_lo*Me`?wxg*bLX2B|PA_!](7(mhhe6m?.R]zp->ffplayer, AVy0V2Vvs4U[._L.oaE,ceOLLKp]qANzs#?EG_WARNI7G^D6sRKrjoNG, "clsA6r&EXMjz ijs7rj%Xzkmp1UH(7499_|N)nbwbQ)start_redpMa6(hcording ~Gs[ubP)T_");IbQl)W4m@jf4a9

 

q@)#fMjr# intWm*VStUkBN9! 34v$KtTsHTxretB8l(Efy_(vva*EZwHWNmwUl =LDn9ZeAcJ#|u ijkmp_e[YBLa*7nAvstartBhEzv@wt,t1_%jdvkC#$O6|Jl1recote`A%MEW?Mrding_lMRPRigNf,un(.zBwZmp,r1]JPP9S 09ji-f$Nwmi%3]RSSilmJ[2DGEk%aLePpxp.k69p9Bv-fath,Zcn-D*UPt#m xQ@(|fB.YNe9sourcX2^EmFt`NPe2!nlwt_Sqd]M_!jY5~8&sgFT*zv`L)T3[-1k,Eideo_t(H!Q~2qVVoX*u|ype);UWinJUtBSJ&gp

 

p%.F)t)F.)threa!P`CYTO$495gd_mu!wASYT05W5te0rf|a`e(,Tx_usl.t1fnLQ%wbnl)0nkAHntZ4ock19Hi5gisX&^7-(&2ETMPwdtmp->mutex]Ef+Mc5G);UV-QEYJwnvt

cSS^mT]O,S? )I0OviF*8|q^g%SZ d6gyN9a@$5i7)yreturp9OlCM@En retvW4k@|QiAHal;@|z7p4Om+G?X

}

 

slTCi^r4Ds`B*Ey+FtatiZv-L|g[c 6FFe8]Cxtint ijkmp$)1.4s@2i3t_WBD9|b&IWY+Vkstzvk0CoF[MSTGOovEGBApR#j]u%p_pHFmrp9recosq?-+x6AAqRc)r(vE&41I8hu*m8d&-r|QZT1PrUing5?5F*UUzfPdg8_lmXe$si_#(IjkMed1wiSEa)meiaP^s+EcmE4,TwlayJ|!1S1+Gz~ergf-W8,hvY@ *mp)

{+%M,-YQS

B#?0%cLow9 EZ%85|Hy]6 return f?w+-2+PsA$!8BfWAK36c)TnpdO^uc8fB*._stop_recordBE+z!V4a30inCV,KHt6kxDg_k%GCjqsb(OilWT1gQT^nuvU(mp->fXORIeulm9Cpfp4ePR,eMgSHxZlY[BIUiflodFa6kq-9SGPyeR0VzK*.HaZK3hfr);

}KN0.s,6sd5

 

int ijkSmn)Z7PoSTm%*dY7]j(YW_pTMspUn2VtN#P_stop_r3ldLNx%JS.pTcecording(fH(?vnQNFDW94EIjkMeb[t@(gGT[diaPD-sSv2?|~rV5lad@EacTL~b4)DyerxY?|nfal^ *rM[2T#L9cmp)

{

VQIA@ asseAH.!Da4)^rt(mp);`(9G!^8]

 

a1.Jzs*E9^]|jp_j*WtYHIthreaA.(b-a]-L8d_mu-hrhB`eUvtex_lo_9eNO1jaFck(&|vx.g.l-r7jzm2+451Bl,[+Sp->mutex);

 

Xl1g~zYXW|1 aAn4[t|-]@haqvFuTeRmYms70m_l*G+9V3%qt|6i!3og(dobz+3R&0mp->f]+88x$pWO~-mspfpkTc?z@eeE,xla3^_f?E5f4PrFL#ayer, AVffu51O`L1i4J_LOG_o?hmKY_@Q^[WAN%,ISN-iAF#@sR6jOi3g_?i-OvNINGjCMqtpLC1, "cjXN|&KJmF|-0dh+z plC][Q0K2?Kbij?yadL]M+IJkmp_stop_KjjG+ivCpy1rvLW$XO!zIep7$$0MujGaLn6cording ");

 

j]vLgaPOx!$5& QPx0#*FBAQaM inVL)4zP+UF5ZclKt r%#J4U(.cw+ewULetvs1D3vzpYXFal = Gvo?CMTKS]0-iC9``|e9cmjkm_jc6sv3jp_stop_recYnymjBVC[Torl|+JSwURdi2$cJ(3rn@5S+Y7)V1^g_8rebnkX(c+l(mp);vADH-)1

 

Q4(acz]4zD~B pthreadKTIM4(b^!cX_mX?ITK1L9wMOd7uwgRg85y$tex_unXV#B`EP2nIkWlocv3`cfm]Oavk(&lU~SX_0%Tmp->mu3PW,e0$4`)TX4teN^gu@oDZx)neM1hLIWpJZBW;

return rmRfDOkt&etval;

}Pgz^.__

 

 

st#jYF8gC?pIWlati@3z6#5@BZ5?c int iHKvkKQ)m-p[Xjkrm(5nv3qHmDl+~lq@lU(pp_u!c`Gma%.gl1iFxisRecor6o9Go6m3wdFinisoM5|sXWhyVf6l6MT8,l!ed)73Gs]e*bV_l(Isd]pr,%gH[jkMe|?,r3rNwlzd2wp`T[*%i`*2FR2u,awC,,ghH[6xb&$Playe(9alHovX#RO]rsDj^?SEaDH C3A(NAoEG(Cpq*mp)

{

.2o[hg returC6jf]P*BrUv~bn ffp_rqVlx8FdkiecorpKx$CZ,.*]p6r5u_FxqMAqc,d_ulV%h3#R.#+isfil9Vo$mR2+kni~QUq4MxRi@*szMc&7-dB&2c?%heC&X^N1Ypd_l(mpoZ^qd->ffplaye5RJQ1ki-EuDr);dik&I&~v#m

}

 

in7KSt8)]&j9t ih@s9mDgtjk7By[~Uonr[mp_i3r9SOrCB442m8sRecor@z$t,vJ#dFoAK[a*6E3Ui-0PD|g%Bfe^iO6npC6vGSDvis2TqDR.3CVhed((1_x+ornYC@dIJlNmuGYW6VH~ahjFP#Echp[MvkMediBq0l3vak2~a^#d7NSw$DSPlaye-SdGW_jsf?-xTr *mp)

{

+I`!sDt?& as^Ax(?NRserK,(-~]LjJgft(m#KD,#(hgM`6pR7]rG^I*K);

 

8RH3?riYTfIR pthB[8ONyELwX!dreaRsM5auTNy*BaX@RDdJ-3Gi1kSC_Yn_mr8tK&*ALuteKxh!HkmK0x_lock(AG&!FrrAK_&mpsJacWcis`V%-uzdEQV,n>m4PG#hoOGu2LuteqLiR[a`JDmC2^xlaJDU[6#8.);

 

avCzX^-)0Tc_lg~vC5O6F0o.j8gf0vMu@Toy9Tpg(m|ZPQkiSG&vp->ffNcoy1xC591hplayer,Rg*7v 6QvQ17cwG(AVhFnwh`ieifO_+Fjq_,@x89t~aLO?6|9lAHG_WAwD@]f3zVbrhRNINRqaix#G~?zEd|u,P~rp)w, Yy3[G*"cuC^g2eDNX~jz Gq,!DbVFgR* ijkmp_iVwf`iQg[sR?xl9H[T?%MhecK@3D]]nVs+%ordu~CO7)DFc.FiKq#sXSQoE]w(RSnishQruBObP5tjx-ed "MHF*wq$efM0);

 

int rejM-j$YD#M8tval8~CK7STh? =%c9xWs-AXK&t.y ijkDZ.xR2&Y5aTmp_isRecorZB@,P4dP[FG8o[Fi.$FinicTHgqkbj,FRshed_l(mp);8rNi*1eR)`z6

 

8_.zS[qv!^F 1A(RKnug7pth2aM5Pk)t_M^(rC_6k9!g4ead!%zBeHELsK7dWc_8eprN?IKzJhwmut__7zh3jJb~[eex_@jmG|eTxqBr,unloDqn)$7Y%MTPcsQY*rOQ!ek(&mptCR80UM0a`b->mfG@4FDTd7)cutex);

OycTz5$1w#*?Gixrretur@-5*PM1~N?w_n re3XBC8GqrOrtval[U~64qY2mt;

}

 

4. 打开iO7p0xPNJAOC5%j+!$t,_y6H5&kpYWbz6zcli[M-t-ayer-android4gLesG0,A!R3/ijkmedia/ijkplayeAd!#++TxrM.#2kN`Gj/fXiU?Mo7PGZu.nf5Dr9g!3L3JiF_ffpY?j(bF0q-^lanc-.xIO5@(]y.h声明上Ah(OuY8X7Sbh,面新增的三个函jv?cZlYh7ZK(数

 

intum`,^-z]czt$w| %,5DTFMB*Y $1qj7Je[U kjQ61y7 ffJG?)m*`zvbBXp_DSaH8POs[#|FmX1atart_recoQlYHtbHjmrdb-f_2,JGL(f,aing_l(F8##^|Wz]-FwAC8C~Ss_cM-Pt&HbVyv$6t!layms*1`WK[2ce6M0e_H*rFAr *ffL*^RtF_YTG.gSp,U3_gpBv1Zivor1 Bf`7vPEmOrivhiPconstU7!#kb#BLy chaedC-J?+zmr0wA9@H*zFpL .k8.YsRpDIA(.Q*f5BfrHGPlTFilw.D#.Hvve_nameZRPOh,L([m_X);//VEwetv)!`,b开始录wiJB@WW@Ecg

int i@GXen?Ftj8(Y5 fatJGq1LH.[sfpwE%@iFr%i!_recvc#B)FKOord[5M3i3$a_i9fQ*J~j&76U1Js)#cag+w]2+#HH8finisheXok1BPsJnmY-(BVd_v5w7Om,Elqgfi8D7(9k-%dZlaJ3HtFFPjPhzRwq.cPVgNlHxS34VGitaynP~DQcQ#).-er vK_#KJn-0^*ft!3hP*EsDHZIfp);//是否VjHS#FFnb在t9o&^r7Q2@录B8~hs589E

inK?U@X*|U_m~t _20(hLO?!U8 *|ab@YsAJ*K3? w9|krnvziu8+D ffHwn$87CW9$p_s|ckkN$4e78top_recoKOnfHM9|h?rding_l(FFPlayer *vRKAT1W8j$3pffp);//结束录屏Y_5~M^uQf(,k8_i

 

5.在fw1)dAEApMyf|Bs~Pnfs#`ac_ffplay.cZHT#9S@|aIWbK8q中先空实L(+nDuFmzD&现这P%XNW0m三VJgd[-NnY,1F个Mnlqu)%[V.ax[3方法, 至fae,_z0此完成从jav,W9J^WRX])a1Jz(oH.z@&层到cK4yCWu~o层`_FV8Owu0]2,uRG+oD8E$Z1Yl以及ijJNHvPVqlOkp#wmC5%-2G2la[V2uyAyW!Jlyer到m,e0_MIffmpeg的v_~v@^6BEo参数GWB6Z,Hu传递。

 

 

二、视频编解码

 

对R1Wx1El$r于6tZ-R*QEnFW视O#Ye8#H]b,e频编解#cKK73~wnjm(f码,我2N#i-))i1(Uz9完全是|8sDaw2DLk个门外汉,但fmiY$UILILieJf_ff8VG-@aDF(tpE[MFRbEMy`]Ol1BWgNjac$vK?abuNq4wndbyFsQSP2Q]*3casV.c中的decodl_ul9_JcX(HlMKzexezphcJcX$G?p(r_@?1jcM(rnWde[J*r]2#CbNcode_sbXWdi?I6frafALrf#@n-8SmZmF-m[q]p&OHTkEe函数引4370~@Z起了F-RWI-+#我的注意,函数NyL+VI6s5L3n0代码如下N$@KKULXKI

 

st^fSF&8X-OL(D@BatiA^Wz]p@Uc i2|B7hJd,pFVnt de$C%Krcoder_deckZ(P|)Z1odXB|#M#F#njbe_fra@QrQc_-f*wme(6@.896@h^FFP$St1eAG3TlayJZ)$,OY-H[Tc1er,,QPU@[!^D+ kWU]KQ68*ffp,kjmIjr@ Dt!%HXK_ec_wS]sG]2X))*@z0)odApzK)wNN6lper?n7S!u1x# DOguxIGr#*d, AVFrIG+~v4Yo67NL%ame ptyX~l*frame7,cQZdYgcsF, AVSuvyBYQgg)KyKbtitlem6JFd|did 14F8]*tmN$*sub)V0b2QE@rwq|u {mT8i6`7)Ht!e

g`l+yUAicz?) int got_frame = jji9NU-?]&80;

.u5fv2LkC^yS$jdqxA(?LcvpoMFDu|K]!2E8I)# {

nxqoJvAk /)1I^5#DTXSG6/...

WA6g`9VbTwt+%HbLsT ]kc4!NfB_6Uf Xp,onH2 nW2(6[_LXsw6%R?L#8P5i)39b4Djg4stG24Fipr[Ar8cIAe+r~MX|h ,pB&Lc)]IF(d->avctu*#)Cg6qYlyJDw(x->coded-*3z(xrQp,c)Eohu8l%V0d_t&kRMCxTMMDH_yVdqVnk`s!JG2kpe$8E?7)+N-d+)B5fR9], E#EWFi,#lm,5{*OiT$&wrf-uO

0yiV3[+29Z nUkkoaYp7l J2L,.m`^M~J0s c)kD-4HuGJ#%Base ._uDZ9nFw]A$KbN#.?@Gl9VMEO,h02Omd(FDI&l`[$DRFA_TYm04X1ax+E+PE_VIEeq$9z*nDE&.,mU$F&0&ZoicvOA%`TNqrZEXP:.YZNi!dN-Hc {

eZ&gDedvq#%h@^vJ E$JfQV+FD@[ej ret = Wyh(N)NTav]3JS+gnQHL[gco,98lt]Z6l%$qjd7|RP[xvz?ec_21?,7VgE*oA-decoU!AJ]ykEj~Q-dlLIjpi~YY5TtXLe_vx^.siTiXgNIiBsb-nK)#Fd$G[wSy#|R$!,!s@pBeM(R00!Z`3Hoo?zp$aJ-1tb2(d->aFEb]|jLdkPrvS4~yu-(vdSZcw,D&$y1swlhtx,q,HG fra.^Pl6XvYG+!&omPXXhx(Z~-uNMM88YsseGws?X5T.7.Nk, w(_#|Ab)du`&$)sSA.@nLngotlEk]5+zUo-t_frame, &d#A|m6Uxi->pkt_te+)pj`(A8mp%K5Vq|]A);

(iXntQ~K3K q%[-DK*)v0x ]enAAo.%1p i]g.`aDx3]bE*f (~OV!xnpt.PU4gv%%YbLi30K_!CotJV.i-EX0~8z_fLNL%XuCirame) {

%g#&^N[vXvu Iifo76AA]g2_Jj ffp?dexhZ]!rOyiA->st8ChCC8(*Mleat.T3~GI%9Z1-)vdwHqQWlwN.9C^qps = (ccbTHd-)%SD.eKP~`Xk^1*aXdrL_S8OX]Qm_1H.VkkpeZL@FvCFk.edST^E`nLjY74d&ra(?S60s3mplerAhGtid5W$]Ldd(xGaXT2ZT~`s&ffp-+|_Vqs#Ps^>vdpsMVmeAT|O_grSgo4+[R[6s0`H@[@RDoa40d1a0*ejmple`7RlwJJNUo$Rp-r, FQSH99rCi*FP__+]hck~NWO|SHO+XD2sMjh*TUf~9W[Dtd`$IxgvF_CWPcCw&(rM!VD9*k|B~|AAw^qGPS11]tc)?_5oi_(VLR1fD[AVCO2v(?4OF!XDEC,3%nvxnH9tU[?s "cE-v^7dK(tvdplKF_aFIWm29ihgs[avcN+F9h94ZRs6uodeaqu)qWS?uV^cc6iUps9S]K#@Zoyl3?Rsq("Ta25``I?$ju)cs$i8Fc2;

if9!^uV*P|Ex](j (fo|YDYEPGKqajVfplGu%%`Ns2_w*V->deSlS(K-Tpbc~f5yS3Z]kxoder_reo_FDhN,zrder_ptR4QWO,&6~d66ovs == -1z@j#9K)gnR`Uxe) M&4wiZ{

H4n)Tysz3 fra1+ll&tZtCJmSH9),@*bWbVe->pts = sMsUC[s`aSavooR~0$Bpf_fz[@e(Lfp!rXj(lmt5!am%D~yLOtuXue_getXg*13._xqZdsMl_bSYdpD)h~wcxva74esRFEqD9n2s.`#3n8YV,]b3tS!TCvMPz#Yo_0uGxr6L22.ZeffortPitwpQ7F*cW2cD_timestampIV31T7%Q^(framTlE_vbXe);,ZA[.@q|qx

DQ_[#W!du[ 2$wS(FQ#a@ L.5@Wib.Q6?%A9 } else if 6F#pz1rP#(w7u(sCyRI(ffp-TLji+usy.W*$B>decoo,jmWi,6AwdocmCxg_*ler_10VX19uQn0rU|RKS.JC`^e,MeordK2Ut_p+useUP__9gO]3H`r_pU8TEG4Cts)Y+XFMAnY6r0q {

|Kr9fJSr~DUC Mfh563f#A frm2Wb]oZhame->pnO9lhze?|ts = fra~5-Z#lA,+EI(Eme->p`!vz8@|oG`9V%7kt_pts;

%%u2Q%~jN&z%~ } M+h4Wgi@k)p0aelse ntxekh#7A*C${

r#@&d6_!LKG1 frame->ptM5F0Tqi~@JI4q[s*jMlU]Uqc R_L0cqzil42=ulX#R3xu fr$L1w)qame->p!`E[H7heqO@kt_dts;

n!mIVN~JTc }

Yy|[J56n0* iTJXyJy~E) /%trLJG!]!N2K[/cjjpYm?iW3%TlE^rz cI[PF7uw[U]0om+g_yi5EmEmoWBr|`fes5bRDn: heRL$)6BhAhGr]!~sdg,Zsteq!KqdWstcul5 need tof8BD~.&U.a dofyWWzE4DJ sWF(YXc-%X|#`1th ..!.H3Wb7uw. o4Txfd7AXN Cx3I@]PbC$to catch~ktBu.1qX_Aef vib1y7V|mxNX.cdCNRB]fqbG*xje*|7BvcKo

uUnM%RUB }ZKP~[5M7ltwm

YAXH2XqJ #1y48+yH-L]1z#U }.F&molZeI_

uwNNc3$XHh]+%D zrG-83U$ O38cTbreEK0vGI(U5QPtsCak)##p6&?Tu_g;ULqpgF*[k[U

k.kp(cuSz FY1T)dZ39r case AVMEDIA_-)[5_Fxmt84rTY?,c^it^@_#PE_AUr?~^tF~r`Do|3(IuFInVE2V^4IIO:

l1)6@R_`Q UX[]CZM) 6aQJjqCjm9 t3FUe@`sJ mud%RaVxV ret = avcodVz4c~pr]8uydecVoiDb8]dz@+_dHUQp-m3Pi@ecodh2K@R53~Oe_Sz|*!P-auX&ZKn8L,W,d?z_y~db@%S?kio*-10n-YZ)qusF4(Ow(MvBhd~5H8b,On->avctx, 9YZ8^*[rK3@fra48MbGWk&me,_n*[hj7%U( &L+c$Yq8c-Tigot_frame,Azs5_IdO3yXSn eNYE1LK~NfZoq&d->pkt_tem9qIP6%^SiywNp)$A~9IYiuwU;

%f,Omi7u&a7-Y! 1LOh5L,^mJ+G ,ur|LvB1#]SC50]u @GNMN5 i&sktf+7sBf`hU5wF (gotjZq.iAPhxOcIDq_HgJIAB&|SJframe)18qNo`K01~cvOuG {TOI),0xfnR

KM)`^TR8&]w. feNWAzE9O -j6kr8m]48 0x0!H^6i` a~WlqcK# )k[5E^fYH(+AnS.Bz`8X-dVpKu2ax6RabQE*0BhDNN(ttiosfTi[nD8n|q4nal tbbwqjutSAj.-e7M = (ANya|qVVklgVRatil&jI~uAb8EonalDIrghZ9m8hJ#) {1,`yU19Ejy8Bi frac|l9-yo|f@e_C5me->sCj%&6k+p#ample_rjez9%,4ate}T*9KC)yLd@yy8;

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GgaLGj4| c.U^(,-IV6k_jF] (gi(KGCM)V ~wRN,&+813 i9DF53i@b[` ,$CM_id e9H&C,RhwlyKn$(&T2se ia,5`A5^$*-Rf ($X?aKlIiYfBw5KdY`~(i[[+$ramJO5X|QOue-qM1a,[CRnq]w33>pkt_p3(EEljIC1ts !=%hM|c@GP)Z(jM RJaPKb+i1ABdkX$M0UweVyU62^Di_p!cT2TRY%VN[lJ`Lt&WPJO-L+vH_hMLPTS_~lCz@e&cwyJVALUFhf7Daa_6E)

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e*i?Qa6ZA]_R btUfckB`_7@4 AEULb~@~Dh* MRjz@w xrA!55Aa90toyD ehDDr4D.D|EoE6blt4P6+s-$GY]se oQ)^u7$amF#yOqif (de(VMz8LM->next__Oq~t@f@L(&onwp~us_Fi|fqts !iWzl+`v~_g$=_0#[ca* AV_NOPTagXUU,1z-h,S_VALD6T+EqwA?)XUE)d4@O2bGQ3-

|B%`i8A*Aoz+G,#p u*Ys9Y.nC tgSns-&_u0 _$M)y)3R_ )$KhAU5|%_D el2x.xQ|0, d?3lj@^sfF7n^% st.&W,8cqOX fF|wyphIqQcrapOCmSRf,9qwme->ptsq1[~[gDob.Va = aM~`I&cdi%v_KBIBj%RrescRWlrYNbBkX#ale_8xg(^3#I.q(d->next_pts,1.[FM`)XO d-i?z[MVq%9N>next_pts_!ENL+@02St)_UJ.m`mb,g6*8_j8AL~#,9 tb)fpPRB;i)N7sMbU

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W~Ab%7 jeGcdFcx5DjX `]!op71 ,&Q3(w%R6C8 @?plkn7Ket%]A XglRliOa4f L[w?,ot_c|[v dD_|W)0YE89)9->next_ppMAM@xNSiZTtcg|9wU~s =t^3C2Xb| fr^]X?Z8Ncqp]a.oamec%hV#I%f~E0AD-*ugo~2pW|eW>p6_RBElVJIt~D[6$t$.QPps + frH1jt2#gfKC-$6a,H5vewYDwmcuhS7~.7b8XL,e->nb_S+HE77A3U(xFsa*#oUARs5b!m&oOL3CKpl3snsk+gAS0C]les;XQ[F|1a%!Cu7&PB

?.7Fr]RG2i 45STypD*z(C `rPXr.S!4Dum6 v#,qS lU&_SY&Rxc PFUGvfrM rQz4lHY%,h|hw d0]F2_H93bXj6->n5UqJl7XEext_Zo3`9c%V0|(Fpt5P.SLv8iI|RsJ%8cBspo8_tb = ARtyk@+E4Ptb;

b*SV4Z`D[9v _9|%|#4YCvT ,@2$DV5r ms`eoS?~nZI}

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3!83US._vLy Cu6Jq^P4 // FeR000m446fFPA&e5VMU4~uo_MtY,i$)8UcnDEQ|Y3~,uE%`RGw*e]Pb&UrE]ZEnPLv0V|F: cL@V7ec(eqNkase3K?s7d.cEI AVMEDIA3b+tH1G8knA_TYPE_SU_Bsz6FIBT[3X~mU?T%Ie%b))JH!6TLE:

68.ovOx#%]iYe$t jU^F hPjsXzH#i&- dgJ^]o(g?lH%`CefaulTTH#L4moyg-t:

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Bl51d5E*wW //4s&$RWk2.tP...

} WUyg$H3B,|wqU|1?nZVTOhil602Cw&H2.n@AI2e hY30lxl,KtoU3(!goYTBBNF[@[_rkFIt_fP!#%u2)u3x7r]..Lgm4&g(WamblZkjL8@6e && !d->fi4FnM839G~PMnished)p+!`Qr*Z[9];

rOkLBD-MetIL1CG~*VoPurABK*xq4En goK2]v%`6Ut@.ov2Nb|Lv?~tvt`5I_AQjoZff%%m-2V+8zoxlYr4j)^UEv3IYbj,ameQrt^Q@f.*ZPf;

}

可见@]ZFU(EQ9^(3UCI1J,本函数在一aY@IwicD个Rnw&pfPOhXy8*大julAI3i`_$循H*@UR|#BOK环DeJY^!XJ`中d?&J7`iu0cmE7@三个7ZTyf7.E-!xcas-ftgJoj[tBeQsvEO`实现了rR?DOZqS0yiWA|视Kd3922Epk5频的解码,将视频、音0ovfRA频#OVj和字eK,c4iFoFxzwin幕分离。

大qoO(c4f4hSGO胆猜qLSUFT_M1~X想,I^%Kj]j[|eHe需要在这~%xwC[f6俩caseiYfzwtxubWZMi结s`.e-VMcRam束HRKZ后做点手rB#awIWD4脚实现我们的8Jt!iHmuX录屏需03(Nmpj5sa求。那么问题7kh[go`%3)来了,这些玩意儿我e?8(bA只能?[7p1K(__AOd看!fPBK)#wz懂字母,怎Nfqg$L_FQ_9P么做手脚。

因为yD2SEiEZbRwbfSgnj5nZ~d%,C!kplayeCk*2%`Yxer也bgVA.,+是1(BrXlBME!#来h|yh自1@.@l3yT2X对ffmpe0XHW]K[pXOKagMJ3a^4FB3的ifT%lT-a__R封装,

打开源码jFnszI25&`iA*vi*zl)jpgh7gjj3aF[.7D@suxkpla&^u[fnLhvyer-andr7kjGiwP8woid/ebVvYRq$.Daxtra/UHbyN*dH%&~vtffmpeg/ffmpe.VRjL9BXMuPdg.chU5@oef~Gx中有关于视频音频nO6~I|wPO9u[L编解?wpmo`^~+g码的示例代$tE`uu0l+(码&T-cD&$v。WqDC-*4dum[Je

参考p(uvM$&@其SKaKU9B中p]0,tg+w5do_video_ou9Vf@vEyT2YfA$uto?MB-aMT`|9Sm.r(()函数s^(yYWru将6Ik$~~Bz+j$!&AQ|,#+WxdVFriNd8h`ame sW|oMRO[n?`m*_SszCMLMjnexb.V]O@[TW9t-t_p^U_PTnYndU9Dvictu6Yn!!sJchVc~.re3CoCCO-V.O2写入[(mSY&2*到54&I[9cG`Vz6OutputT]ZND[_aStreyfL4t[BBB0YN^am *UI#CIv-eI[JAokM6J^ck-ti1st代VcmrLA8!R9Ty码。$LcWF.d

参eBDzV#@K!考其JQzTVx)^9t中d1vWvEZd~2UA.vo_&NOQAv4FauHGn0d?Ddi[rh3VWMWO#L.o_?&E.E8OuXQoutC9rnQ9F!0mX2A|w_()函6lngsY+U9F6-3z数将AVO+#j,7PTP^4MJFramcwP9Rf?-IB6We *frA|&tH$,@ba&ame写入|t,cenM~^dX~到Output?QSulflyS&(!VD-[G6,`tream *os2Jt6&%lat代码g8LB9INi52fe。

 

 

最终效果请参考XX直播Nkd9$%mXzeKa+(^km|g?J$Jzpp, 此处鉴于XEKUMA2D公司保密条例此e~,9iW9x*步骤不能列出详细~~9ff8ug8代码,只|as+Q2fsb叙0Z^0++Flrv.述录Huyu]9V,IoUQ屏思路,大gNz#Qs]|Qeso概如下三大o8(%pjSqk步:uk&7L%-SZ28+C

 

137(odLw.mc!edz|1iN7)Z(,_2录屏按~!rqvsQce!下时,首先根据传入I7-`VH[DsC参MdXQf.HJxZ8F数MhC_FES,-k调用CDd83f$&R,PavformatK|Y%SeTRTW~_meQi+V)@0gaerAhpcrjv6k-lloc_output_,`~yCaTZ[zXlMconRV!uV.zE)&t^)7%eeWjbgDMlext2()^3Af4v!ww创建输,V.GuZ2MLT.p_出#LRRd0环境?oGtXGy&,

1.`)_cSF8UY7NSFd2设置开始iP&j%TDQ录屏aC4rNv!ob标记ToMv)^k为B+#s9@YKI4)2C1,标eN(dhPVdHXxm记用于ffdB#.Lyg_d,kp_rNmg@Gh^D&FecohG!]tkADrJN*T]aP~3Nd5Is%yD9Qdp.n_iaJv#,%r]CDs8rs5jQh*iYoFfinished_l的回&*P?lYo$Y5调

1.3`fwaz?ii_O~#再x]ie7()T调用avfoJ1f(h*cGD]1#sefrmat_write__)#wS[9F,kzhS&1Tt+bV#ekBt56$XIoSY$ader函7)9rM[oh|]X数写入头信o3Z%H*id^@x息c#KVU%$s9Ku,-Nj!c`GC_5SpGeI

 

2.0A$F$3e8X[Ej再&)H.L#h_)G根据AVj61Y!@N+,)oLFriEKr%cw12U2wamNH)T_1(Neqe)HM7w[6)vD(4写入音iIG7wad$39视频信息

 

3.1录屏按钮抬x.bKL705cQ)i起`fPG时8TXW+-OIf@xC,再调用axaLjgzLG^&D8v_w^ifA@lw#EJr5D[C$u]bmq%Qsi$YX[H`K%EqZJte_tn9IQ*moj(IraiFPk)0!%ler函71uXg]lbD数,ORiMUgp9*oJY写@kGq7E6wM5入尾mcOpu#DMrnu信QR*+#|息

3.2ohWPEaTT56设置开始!0^L8B03~bLG录4)0$YDI35C屏Cq[^UpS!j标KR.3o+V9!记为0g&r__c^vtl

 

 

三gZ%pIVC21%、VV&l8fpm遇到的主要问题

 

1.有Gy4.&`DTdok声音DA&edcx?UY无图aqJLQ1?-)M像

2.IRD5?q~8x有图像tr`iFQm无声6a^c[(~kcUl0Ij音oj[cjClbD

3L83|[z%7SdLz.音视@vlNkcpKjb频不同tOjM-3rohQT步

4.hxq_6!r8%`IC*p花MGEaOUdv5a7屏

 

以c?u@+HJMvm上问`y#dam题486*((9CxNSX9n,2hl~KJaV_(38主要wv^wxr]A得+$U~+?Tq在^%4@qH4~7开始录制KNQQkNZwP时IVkw|ZrgRT?%,需要预留缓冲区,wDO[6XO来根据视频x!U**4(P^关键帧y1VE0FD&5cZ[与h[WXI,6TAoH音zx6r[iXw1Z频帧进行时PTXD45Ul(tz5Q间上的8yX,?|D?YQX8W对齐。R9@Tkk42粗暴对待为了Jb_t3v防止花#^v.CPk屏,将视OdXTu%s&t%LD77频关0sJ*Asa键帧_~(|CBf[之pB+oR)YG前的O&5$?pMM1L帧丢弃。

 

5.录2d+M0gAf@R制时一定#I6o8^@se,(~y几率[9HzcV.lq崩溃

 

是因为缓冲区实现方式用的~HL5I.^|是数组,lTKLu$q8wthCi查找GHHAZcGvz关键帧MMiW[Nws3时有几率溢出。

 

6.EC|!m1kNX某些t|)AI!)-Jd)J站ZHZ&UXa点录dH2g5T0-vx)hG~制1`YnuvlKY,Td!会崩溃pH^1n6FbGH

 

某些?@%X-9Tj39|站点的视35e5b~XE^M0,O$h频kL|Qs]+D+(格式中下发WBdX6b*,$#了字LJ&bfx8Kn_XS6幕m)kS08H``m流,忽略字幕N,DM,n1??v)QP流AUEoVNr@(t即可。

 

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