Fasahar bidiyo ta sami ci gaba cikin sauri a cikin shekaru biyun da suka gabata.Tun da farko, an yi bidiyo da tarin hotuna masu yawa, kuma sun yi amfani da manyan fayiloli masu yawa don sanya su dijital.Amma yanzu, rikodin bidiyo ya kawo canjin fasaha - matsawa waɗannan fayilolin don cinye ƙasa da sarari.Hakanan an sami damar watsa bidiyo ta Intanet, duka na gaske da kuma kan buƙata.
Ɗaya daga cikin shahararrun fasahar shigar da bayanai shine H.264 (AVC - Advanced Video Coding) wanda ya iya magance yawancin batutuwa masu kyau game da watsa shirye-shiryen bidiyo.A cikin blog ɗin yau, bari mu koyi abin da H.264 rikodin bidiyo yake, yadda yake aiki, da fa'idodinsa daki-daki.
Menene H.264/AVC?
H.264 kuma ana kiranta Advanced Video Coding (AVC) ko MPEG-4 Part 10. Fasaha ce ta matsa bidiyo tare da haɗin gwiwar Ƙungiyar Sadarwa ta Duniya (a matsayin H.264) da Ƙungiyar Ƙasa ta Duniya don daidaitawa/International Electrotechnical Commission Moving Hoto. Ƙungiyar Masana (kamar MPEG-4 Part 10, Advanced Video Coding, ko AVC).
A zamanin yau, H.264 codec an fi amfani da shi wajen yawo da bidiyo.Wannan codec shine ma'auni na masana'antu don matsawa bidiyo wanda ke taimakawa masu ƙirƙira yin rikodin, damfara, da rarraba bidiyon su akan layi.Yana ba da ingancin bidiyo mai kyau a ƙananan bitrates idan aka kwatanta da matakan da suka gabata.Don haka, ana amfani da shi sosai a watsa shirye-shiryen TV na USB da faifan Blu-ray.
Kamar yadda wani video codec, H.264 ne akai-akai samar a cikin MPEG-4 ganga format, wanda yana amfani da .MP4 tsawo, kazalika da QuickTime (.MOV), Flash (.F4V), 3GP ga wayoyin hannu (.3GP), da rafin sufuri na MPEG (.ts).Wani lokaci, an lulluɓe bidiyon H.264 tare da matsawa audio tare da Advanced Audio Coding (AAC) codec, daidaitaccen ISO/IEC (MPEG4 Part 3).
Ta yaya H.264/AVC ke aiki?
Mai rikodin bidiyo na H.264 yana aiwatar da tsinkaya, canji, da tsarin ɓoye don samar da matsa lamba H.264 bitstream.Yana amfani da ma'auni na toshewa tare da gasar motsi don aiwatar da firam ɗin abun ciki na bidiyo.Fitowar za ta kasance macroblocks waɗanda ke ƙunshe da manyan toshe masu girma kamar pixels 16 × 16.
Yanzu, mai rikodin bidiyo na H.264 yana aiwatar da matakai masu dacewa kamar yankewa, jujjuyawar canji, da sake ginawa don samar da jerin bidiyo da aka yanke.Yana karɓar matsi na H. 264 bitstream, yana yanke kowane sinadari na syntax, kuma yana fitar da bayanai kamar ƙididdige canjin coecients, bayanan tsinkaya, da sauransu. Bugu da ƙari, za a yi amfani da wannan bayanin don juyar da tsarin coding da sake ƙirƙirar jerin hotunan bidiyo.Ana nuna tsarin rikodin bidiyo na H.264 da tsarin yankewa a ƙasa.
Amfanin H.264
1.Ƙananan amfani da bandwidth da saka idanu mafi girma - Yana ba da ingantaccen watsa shirye-shiryen bidiyo mai cikakken motsi tare da ƙananan buƙatun bandwidth da ƙananan latency fiye daka'idojin bidiyo na gargajiyakamar MPEG-2.H.264 yana amfani da ingantaccen codec wanda ke ba da hotuna masu inganci kuma yana amfani da ƙaramin bandwidth.
2.Ƙananan H.264 bitrate fiye da sauran tsare-tsaren - Yana da 80% ƙananan bitrate fiye da bidiyon Motion JPEG.An kiyasta cewa bitrate tanadi iya zama 50% ko fiye idan aka kwatanta da MPEG-2.Misali, H.264 na iya samar da ingantacciyar hoto mai inganci a matsewar bitrate iri ɗaya.A ƙananan bitrate, yana ba da ingancin hoto iri ɗaya.
3.Rage buƙatun ajiyar bidiyo - Yana rage girman girman abun ciki na fayil ɗin bidiyo na dijital da 50% kuma yana amfani da ƙarancin ajiya don adana bidiyo idan aka kwatanta da sauran ƙa'idodi waɗanda ke tabbatar da mahimmanci don ba da damar watsa bidiyo mai sauƙi ta hanyar IP.
4.Ingancin bidiyo mai ban mamaki- Yana ba da bayyananniyar abun ciki na bidiyo mai inganci a ƙimar bayanai na ¼, wanda shine rabin girman sauran tsarin bidiyo.
5.Mafi inganci - Yana da sau biyu mafi inganci, kuma girman fayil ɗin shine sau 3X mafi ƙanƙanta fiye da codecs na MPEG-2 - yana sa wannan tsarin matsawa ya fi dacewa.Wannan codec yana haifar da ƙarancin watsa bandwidth don abun ciki na bidiyo.
6.Ya dace da abun cikin bidiyo mai motsi a hankali- Yana da inganci sosai don ƙananan codecs na bidiyo ta amfani da kyamarori megapixel.
Lokacin aikawa: Nuwamba-20-2022
