Maitiro ekugadzira screencast uchishandisa ffmpeg

Kune avo vasingazive, a screencast iko kurekodha kwedhijitari kwekomputa yekrini kuburitsa, dzimwe nguva iine odhiyo odhiyo. En Linux, kune akati wandei zvishandiso kuti aite screen casting. Zvisinei, avo vanosarudza kuzviita kupedza zvishoma zvigadzirwa havagone kumira kuverenga ichi chinyorwa.

Ndichishandisa zvishandiso zviviri (ffmpeg kutora iyo skrini uye xwininfo kuwana maumbirwo uye zviyero zvehwindo rinofanira kunyorwa) Ini ndakakwanisa kugadzira screencast ndichishandisa zviwanikwa zvishoma uye kuwana mhedzisiro.

Iyo script yekutanga screencast

#! / bin / bash

# Tora marongero uye saizi yeiyo hwindo rakasarudzwa
# Izvi zvinosanganisa kushongedza kwehwindo.
  kusagadzika xywh
  eval $ (xwininfo -frame |
    sed -n -e "s / ^ + Mhedziso kumusoro-kuruboshwe X: + ([0-9] +). * / x = 1 / p" 
           -e "s / ^ + Mhedziso kumusoro-kuruboshwe Y: + ([0-9] +). * / y = 1 / p" 
           -e "s / ^ + Upamhi: + ([0-9] +). * / w = 1 / p" 
           -e "s / ^ + Kureba: + ([0-9] +). * / h = 1 / p")
$ w = $ w + $ w% 2 # kuti iyo upamhi yakawandisa ye2, zvikasadaro ffmpeg inogunun'una
WIN_XY = $ x "," $ y # fomati XY inobatanidza
WIN_GEO = $ w "x" $ h # fomati saizi yewindo
# zivisa-kutumira icharatidza meseji inoratidza kutanga kweiyo screencast.
# run ffmpeg nemaparameter anoenderana nekugadzirisa kwako.
zivisa-tumira "Kutanga screencast ..." && ffmpeg -f alsa -i hw: 0 -f x11grab -r 25 -s $ WIN_GEO -i: 0.0 + $ WIN_XY -acodec libmp3lame -async 1 -vcodec libx264 -preset ultrafast - crf 0 -threads 0 chengetedza.mp4

Iwe haufanire kunyatsonzwisisa zvese zvinoita script iyi. Kungo tevera zvirevo zvakakwana. Nekudaro, zvinokwanisika kuti iwe uchafanirwa kushandura mamwe ma parameter mumutsara uko ffmpeg inomhanya kuti uagadzirise iwo kune kumisikidzwa kwemuchina wako.

Dhizaini yekuteerera

1) Kana iwe ukashandisa OSS, chinja -f alsa -i hw: 0 na -f oss -i / dev / dsp

2) Kana iwe ukangoshandisa ALSA chete, unofanirwa kushandisa ma parameter anouya mune script (-f alsa -i hw: 0). Kuti uone iyo nhamba inotevera hw: unogona kumhanya aplay -l uye sarudza yakakodzera kadhi rezwi kadhi.

3) Kana iwe ukashandisa Pulse Audio (Ubuntu uye zvigadzirwa zvinoshandisa izvi), shandisa ma parameter -f alsa -ac 1 -i pulse.

the

-r 25 inoratidza iyo fps (mafuremu pasekondi kana mafuremu pasekondi) iwe yaunoda kunyora pairi. 25 sarudzo yakanaka.

Audio, vhidhiyo uye sync codec

-acodec libmp3lame ndiyo odhiyo codec. Ini ndakasarudza kurekodha mu mp3. Unogona kushandisa chero imwe.

-async 1 inobvumidza kuwiriranisa odhiyo nevhidhiyo.

-vcodec libx264 -preset ultrafast -crf 0 -threads 0, inotaurira ffmpeg kuti vhidhiyo codec yekushandisa ndeye x264 uye kuti preset ndeye ultrafast (kune inokurumidza, inononoka, nezvimwewo), zvikasadaro haisi kuzonyora nenzira kwayo pamutengo waunoda fps. Iyo -crf 0 paramende inoratidza iyo yekumanikidza nhanho (iyo yakadzika compression, yakaderera iyo compression). Chekupedzisira, tambo 0 inoratidza huwandu hwetambo dzekushandisa, kana uchipfuura 0 ffmpeg dzinozviverenga otomatiki. Sezvakaita nemodhiyo odhiyo, unogona kusarudza dzimwe sarudzo.

Aya ese marongero ndeaakandipa mhedzisiro yakanaka: faira diki, yakanaka vhidhiyo mhando, ine yakawiriraniswa odhiyo uye pasina lags. Nekudaro, ini ndinokurudzira iwe kunyura mune iyo ffmpeg zvinyorwa kuti uwane mamwe.

Iyo script yekupedzisa screencast

#! / bin / bash
zivisa-tumira "Ending screencast ..." && killall ffmpeg

ffcast

Ndichitsvaga ruzivo rwekunyora zvinyorwa, ndakaona kuti mumwe munhu aive nepfungwa yakafanana neyangu. Ffcast chinyorwa chinoshandisa zvishandiso zvakafanana (ffmpeg uye xwininfo). Ini ndinozvitaura nekuti vamwe vanogona kuona zviri nyore kushandisa chinyorwa ichi.

MuArch uye zvigadzirwa, ndakavhura terminal ndokumhanya:

yaourt -S ffcast

Zvimwe zvese, unogona kurodha pasi kubva pano.

Kupedza…

Paunenge iwe wagadzira uye chengetedza zvinyorwa zvakachengetwa mune yako HOME dhairekitori, iwe unofanirwa kuzvipa iyo yekuita mvumo. Kufunga kutanga_screencast uye finish_screencast inodaidzwa, mhanyisa unotevera mirairo mune terminal:

chmod + x kutanga_screencast
chmox + x kugumisa_screencast

Chekupedzisira, zvinongoramba zvichipa yega yega zvinyorwa kune mapfupi maviri (mapfupi) akakunakira iwe. Nenzira iyoyo, zvinyorwa zvichamhanya kana iwe ukadzvanya yakasarudzwa kiyi musanganiswa.