{"id":2797,"date":"2022-10-01T14:45:15","date_gmt":"2022-10-01T14:45:15","guid":{"rendered":"http:\/\/mp4gain.com\/de\/audio-video\/?p=2797"},"modified":"2022-10-01T14:45:15","modified_gmt":"2022-10-01T14:45:15","slug":"wie-wirkt-sich-die-bitrate-auf-die-videoqualitat-aus","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/de\/audio-video\/video\/wie-wirkt-sich-die-bitrate-auf-die-videoqualitat-aus\/","title":{"rendered":"Wie wirkt sich die Bitrate auf die Videoqualit\u00e4t aus?"},"content":{"rendered":"

Wie wirkt sich die Bitrate auf die Videoqualit\u00e4t aus?<\/h2>\n

\"How<\/p>\n

Um zu verstehen, wie sich die Bitrate auf die Videoqualit\u00e4t auswirkt, m\u00fcssen wir zun\u00e4chst verstehen, wie die Videokomprimierung funktioniert.<\/p>\n

\"Video<\/p>\n

Beim Komprimieren von Videos f\u00fchrt der Komprimierungsalgorithmus zwei Dinge aus:<\/p>\n

Konvertieren Sie Videos von der \u201ePixeldom\u00e4ne\u201c in die \u201eFrequenzdom\u00e4ne\u201c durch DCT (Discrete Cosine Transform). Wenn Sie mit DCT nicht vertraut sind, k\u00f6nnen Sie unseren vorherigen Artikel lesen: Wie erkl\u00e4rt man einem 5-J\u00e4hrigen DCT?<\/p>\n

Einige der Informationen im Frequenzbereich werden durch eine Technik namens Quantisierung verworfen, mit der Erwartung, dass das menschliche Auge diesen Informationsverlust nicht wahrnimmt.<\/p>\n

Wenn Sie ein Video komprimieren, werfen Sie im Wesentlichen einige Informationen weg, w\u00e4hrend Sie hoffen, dass die Videoqualit\u00e4t nicht beeintr\u00e4chtigt wird. Wenn Sie das Video \u00fcberkomprimieren, werfen Sie viele Informationen weg, und das menschliche Auge nimmt den Codierungsverlust wahr. Wenn Sie das Video nicht zu stark komprimieren, wird die Dateigr\u00f6\u00dfe riesig, w\u00e4hrend die Videoqualit\u00e4t ausgezeichnet ist.<\/p>\n

Dies ist bei der Videokomprimierung als “Rate-Distortion Exchange (RDT)” bekannt, und je niedriger die Bitrate, desto schlechter die Videoqualit\u00e4t (vorausgesetzt, die Aufl\u00f6sung ist fest).<\/p>\n

Was bedeutet RTE?<\/p>\n

Schauen wir uns das Beispiel unten an. Wir verwenden FFmpeg, um das Beispielvideo (CrowdRun) auf 1,5 MBit\/s bzw. 5 MBit\/s zu komprimieren. K\u00f6nnen Sie mir anhand der Video-Screenshots unten sagen, welches vom Video mit h\u00f6herer Bitrate und welches vom Video mit niedrigerer Bitrate stammt?<\/p>\n

Offensichtlich ist die Bitrate im obigen Bild niedriger und die Bitrate im unteren Bild h\u00f6her. Bei einer Bitrate von 5 Mbit\/s bei 1080p ist die Videoqualit\u00e4t hervorragend. Wenn wir f\u00fcr dasselbe Video eine Bitrate von 1,5 MBit\/s verwenden, wird die Videoqualit\u00e4t von CrowdRun sehr schlecht.<\/p>\n

Aber ist das immer so? F\u00fchrt eine niedrige Bitrate immer zu einer schlechten Videoqualit\u00e4t? Diese Frage beantworten wir mit einem einfachen Experiment.<\/p>\n

Lassen Sie uns die Hypothese \u201eniedrige Bitrate = niedrige Qualit\u00e4t\u201c mit animierten Videos testen. F\u00fcr das folgende Video haben wir den beliebten Simpsons-Trailer verwendet und das Video mit H.264\/AVC auf 2,5\u00a0Mbit\/s und 1\u00a0Mbit\/s komprimiert (stellen Sie sicher, dass alle Encoder-Einstellungen konsistent sind).<\/p>\n","protected":false},"excerpt":{"rendered":"

Wie wirkt sich die Bitrate auf die Videoqualit\u00e4t aus? Um zu verstehen, wie sich die Bitrate auf die Videoqualit\u00e4t auswirkt, m\u00fcssen wir zun\u00e4chst verstehen, wie die Videokomprimierung funktioniert. Beim Komprimieren von Videos f\u00fchrt der Komprimierungsalgorithmus zwei Dinge aus: Konvertieren Sie Videos von der \u201ePixeldom\u00e4ne\u201c in die \u201eFrequenzdom\u00e4ne\u201c durch DCT (Discrete Cosine Transform). Wenn Sie mit … Continue reading “Wie wirkt sich die Bitrate auf die Videoqualit\u00e4t aus?”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[45563,40971,45488,4752,45574,45572,45571,45570,45569,45567,45573,45568,28050,45566,45483,45540,45518,45532,10860,45487,45458,45455,45456,45453,45454,45451,45508,45478,45528,40282,45450,45447,45448,45449,45494,45493,45557,40272,45509,45555,45510,40271,45428,45429,45430,45426,45427,45463,45464,45465,45462,45534,4071,45536,45535,45537,45538,45526,45553,45539,45457,45527,45530,40425,45531,45495,45552,45441,45443,45438,45440,45439,45442,45445,45444,45550,45551,45491,45490,45489,45492,45500,45475,45472,45474,45446,45476,45477,45479,45473,45481,45480,45576,45496,45499,45497,45498,45485,45484,45486,45575,45452,45469,45466,45471,45470,45467,45468,45556,4044,45533,45554,45461,45459,45460,45507,45506,45505,45504,45503,45501,45502,35901,45546,45565,45561,45562,45560,45559,45545,45515,4828,45513,45511,45512,45514,45434,45433,45431,45432,45541,45422,45421,45543,45420,4069,45542,45424,45423,45544,45418,45419,45417,45520,45523,45522,45525,45524,45521,45519,45516,45517,4049,45548,45549,45437,45436,45435,45547,45558,45529,45564,40441,45425,45482],"class_list":["post-2797","post","type-post","status-publish","format-standard","hentry","category-video","tag-4k-videoubertragungsrate-auf-ps5","tag-aber-kein-audio","tag-aber-nicht-in-obs","tag-beeinflusst-die-bitrate-die-videoqualitat","tag-das-video-bit-rate-uber-das-internet","tag-die-video-bitrate-auserhalb-der-lander","tag-die-video-bitrate-auserhalb-von-missouri","tag-die-video-bitrate-auserhalb-von-obs","tag-die-video-bitrate-auserhalb-von-youtube","tag-die-video-bitrate-gegenuber-dem-streaming","tag-die-video-bitrate-im-laufe-der-zeit","tag-finden-sie-die-video-bitrate-heraus","tag-ist-eine-hohere-video-bitrate-besser","tag-kann-sie-erhohen-die-video-bitrate","tag-unterschied-zwischen-video-bitrate","tag-video-bitrate-in-mp4","tag-video-bitrate-von-mp4","tag-video-bit-rate-innerhalb-von-youtube-videos","tag-video-bitrate","tag-video-bitrate-aber-kein-ton","tag-video-bitrate-als-bruchteil","tag-video-bitrate-als-link","tag-video-bitrate-als-mp3","tag-video-bitrate-als-mp4","tag-video-bitrate-als-video","tag-video-bitrate-auf-der-ganzen-welt","tag-video-bitrate-auser-einem","tag-video-bitrate-b-auser-4k","tag-video-bitrate-bedeutung-in-hindi","tag-video-bitrate-bei-1080p","tag-video-bitrate-bei-definition","tag-video-bitrate-bei-hoher-cpu","tag-video-bitrate-bei-hoher-cpu-auslastung","tag-video-bitrate-bei-stock","tag-video-bitrate-ca-uberleben","tag-video-bitrate-ca-beleuchtung","tag-video-bitrate-eines-videos","tag-video-bitrate-fur-1080p","tag-video-bitrate-fur-1080p-60fps","tag-video-bitrate-fur-720p","tag-video-bitrate-fur-r-1080p-obs","tag-video-bitrate-fur-streaming","tag-video-bitrate-gegen-1080p","tag-video-bitrate-gegen-die-menschheit","tag-video-bitrate-gegen-die-verbreitung","tag-video-bitrate-gegen-streaming","tag-video-bitrate-gegen-youtube","tag-video-bitrate-hinter-1080p","tag-video-bitrate-hinter-dem-ohr","tag-video-bitrate-hinter-den-kulissen","tag-video-bitrate-hinter-video","tag-video-bitrate-im-computernetzwerk","tag-video-bitrate-in-android","tag-video-bitrate-in-audio","tag-video-bitrate-in-der-digitalen-kommunikation","tag-video-bitrate-in-der-kamera","tag-video-bitrate-in-hindi","tag-video-bitrate-in-iphone","tag-video-bitrate-in-meiner-nahe","tag-video-bitrate-in-pcm","tag-video-bitrate-in-prozent","tag-video-bitrate-in-streaming","tag-video-bitrate-in-video","tag-video-bitrate-in-vlc","tag-video-bitrate-in-youtube","tag-video-bitrate-kommt-von","tag-video-bitrate-minus-bar","tag-video-bitrate-mit-1080p","tag-video-bitrate-mit-4k","tag-video-bitrate-mit-am-i","tag-video-bitrate-mit-obs","tag-video-bitrate-mit-ps5","tag-video-bitrate-mit-streaming","tag-video-bitrate-mit-synon-ym","tag-video-bitrate-mit-windows-10","tag-video-bitrate-mittlerer-bereich","tag-video-bitrate-mittlerer-grose","tag-video-bitrate-nach-1080p","tag-video-bitrate-nach-frame","tag-video-bitrate-nach-grose","tag-video-bitrate-nach-ps5","tag-video-bitrate-nach-unten-fur-streaming","tag-video-bitrate-neben-1080p","tag-video-bitrate-neben-audio","tag-video-bitrate-neben-bildrate","tag-video-bitrate-neben-gohans-namekian-mentor","tag-video-bitrate-neben-mir","tag-video-bitrate-neben-mir-texte","tag-video-bitrate-neben-streaming","tag-video-bitrate-neben-video","tag-video-bitrate-neben-wasser","tag-video-bitrate-neben-youtube","tag-video-bitrate-ov","tag-video-bitrate-trotz-ausfallen","tag-video-bitrate-trotz-definition","tag-video-bitrate-trotz-streaming-qualitat","tag-video-bitrate-trotz-synonym","tag-video-bitrate-uber-100","tag-video-bitrate-uber-1080p","tag-video-bitrate-uber-coupon-hinaus","tag-video-bitrate-uber-ethernet","tag-video-bitrate-um-mich-herum","tag-video-bitrate-unter-1080p","tag-video-bitrate-unter-deck","tag-video-bitrate-unter-einem-scharlachr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