幅広く利用される動画圧縮コーデック「H.264/MPEG-4 AVC」はどうやって巨大なサイズのムービーを劇的に圧縮するのか？(2019)
https://gigazine.net/news/20190527-h264-codec-is-magic/
h264 codec 在 GIGAZINE Facebook 的精選貼文
同時也有697部Youtube影片，追蹤數超過46萬的網紅瀬戸弘司ミニ，也在其Youtube影片中提到，最近いただいた差し入れ（の一部）を紹介するコーナーです。 3本立てです！(笑) ということで第一回は、ちかごろ音楽ガジェット界隈でよく見かけるケース「Analog Cases」の紹介です。 次回の動画はこちら：https://youtu.be/TXcMU7UMAaQ ＜もくじ＞ 0:00 差...
「h264 codec」的推薦目錄：
- 關於h264 codec 在 GIGAZINE Facebook 的精選貼文
- 關於h264 codec 在 OSSLab Geek Lab Facebook 的最佳解答
- 關於h264 codec 在 瀬戸弘司ミニ Youtube 的最佳貼文
- 關於h264 codec 在 kormaruR Youtube 的最佳貼文
- 關於h264 codec 在 kormaruR Youtube 的最讚貼文
- 關於h264 codec 在 cisco/openh264: Open Source H.264 Codec - GitHub 的評價
- 關於h264 codec 在 Save video in opencv with H264 codec - Stack Overflow 的評價
- 關於h264 codec 在 Recommended upload encoding settings - YouTube Help 的評價
h264 codec 在 OSSLab Geek Lab Facebook 的最佳解答
OSSLab Geek Lab解讀一下最近鬧的滿城風雨的公民實驗室的Zoom安全報告
這是篇非常棒的如何拆解加密封包還原視訊跟音訊資安文...
1. H.264視訊碼流最小單位為NALU
一個NALU = 一組對應於視頻編碼的NALU頭部信息+ 一個原始字節序列負荷(RBSP,Raw Byte Sequence Payload).
這邊nal_unit_type都為0 ,無法判定類型.
不過最後有分析出NAL Payload有後面數據大小,為data slice解密後,組合後為H.264 video stream.
2.對電腦DRAM 做數位鑑識,發現名為conf.skey此為AES 128 key 全部使用者跟會議內容都用此key加密傳送跟接收後解密.
3.錄到封包後,要考慮到一個client都用同個SSRC,另外用時間戳組來拼順序,用key解密再組合成完整視訊raw檔案.
4.音訊一樣加密,推測用啥音訊codec ,是利用RTP間隔時間戳相隔多大來判定.640所以應該為Silk16 codec.
5.在Linux版本Zoom設定proxy上設為自建的mitmproxy, 會報警告說未驗證.從mitmproxy也可得到密鑰AES-128 conf.skey
6.測試中發現在加拿大跟美國通訊用戶 AES-key 是由52.81.151.250位於北京Server配送的
因此最終懷疑,確實有可能.若中國政府要求可取得此密鑰若有測錄封包就可解密還原內容.
7.最後Zoom官方的回應是
中國以外的用戶,會立即將中國大陸的數據中心從服務器中刪除。
圖片引用
UniHub 有你好棒
參考
https://citizenlab.ca/2020/04/move-fast-roll-your-own-crypto-a-quick-look-at-the-confidentiality-of-zoom-meetings/
http://0rz.tw/HOiaK
https://commons.erau.edu/cgi/viewcontent.cgi?article=1174&context=jdfsl
http://blog.gitdns.org/2017/03/14/h264/
#OSSLab #數位鑑識 #拜託國家訂的資安檢測要這樣水準
h264 codec 在 瀬戸弘司ミニ Youtube 的最佳貼文
最近いただいた差し入れ（の一部）を紹介するコーナーです。
3本立てです！(笑)
ということで第一回は、ちかごろ音楽ガジェット界隈でよく見かけるケース「Analog Cases」の紹介です。
次回の動画はこちら：https://youtu.be/TXcMU7UMAaQ
＜もくじ＞
0:00 差し入れをいただきました
0:24 今回の撮影設定について
1:37 谷口楽器さんのミニハーモニカ
3:20 Analog Cases
5:09 お手紙 ①
5:55 Cuckooさんのお話
8:10 お手紙 ②
9:51 ケースに入れてみよう
10:56 2つ目のケース
13:28 ケースの罠
15:05 ぜんぜん1本に収まりそうもない
15:29 また撮影設定について話し出す
16:11 おわりです
＜商品リンク＞
Analog Cases 一覧
https://amzn.to/35elVMZ
Decksaver Roland SP-404/SP-404SX
https://amzn.to/3n6F75o
＜参考リンク＞
Analog Cases | Amazing Synth Cases
https://analogcases.com/
True Cuckoo - YouTube
https://www.youtube.com/user/cuckoomusic
「XAVC HS」とは？HEVC/H.265コーデックを採用で効率2倍 | アーリーテックス
https://www.earlyteches.com/2020/08/xavc-hs-codec-hevc-h265-use/
＜瀬戸弘司公式LINEスタンプ＞
ぷーんスタンプ発売中！
https://store.line.me/stickershop/product/1121042/ja
＜瀬戸弘司の機材やおすすめ商品＞
最近使用している撮影・編集機材
http://kojiseto.com/kizai/
瀬戸弘司のお気に入り商品
http://kojiseto.com/like/
※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※※
※上記製品リンクURLはAmazonアソシエイトのリンクを使用しています。
楽曲提供：Production Music by http://www.epidemicsound.com
＜主に利用しているBGMサイト＞
甘茶の音楽工房
https://amachamusic.chagasi.com/
DOVA-SYNDROME
http://dova-s.jp/
音楽の卵
http://ontama-m.com/
＜画像素材＞
かわいいフリー素材集 いらすとや
http://www.irasutoya.com/
素材提供 PIXTA
【瀬戸弘司の動画】メインチャンネル
https://www.youtube.com/eguri89
【瀬戸弘司のミニ動画】サブチャンネル
https://www.youtube.com/eguri89mini
【瀬戸弘司のゲーム実況】ゲームチャンネル
https://www.youtube.com/eguri89games
【Twitter】
https://twitter.com/eguri89
【ブログ】
http://kojiseto.com/
【インスタグラム】
https://www.instagram.com/eguri89/
【Facebook】
http://facebook.com/eguri89
h264 codec 在 kormaruR Youtube 的最佳貼文
One thing I forgot, was to bring out 5 survivors from the survivor bulletin board for the "Gang Banger" Achievement. No biggy, as this achievement is easy to get, once you hit level 50, unlike the previous Dead Rising games.
My thoughts about the game:
The game is fun and vastly improve in graphic and game-play fluidity.
As a gamer, this game has improve in a way that anyone can pick up and play and still manage to get all achievement without any problem (on normal mode of course or nightmare mode in new game+). In other words, "Simple".
But as a masochist and veteran DR player, the game is too simple. No more time dependent story events, survivor don't need to be escort to safe-house, some combo weapons are so overpower and yet easy to make multiple or even spawn a new from weapon locker.
Regardless, at least nightmare mode is there and it does took me multiple runs to perfect down the timing and survivor requests to beat the game starting from level 1.
I still have a blast and think this does worth my purchase of Xbox One.
Hope you enjoy this walkthrough and Happy New Year!
Little worksheet I made during my trial runs to perfect this walkthrough
https://docs.google.com/spreadsheet/ccc?key=0AskWBIQx04G2dE5fdlpiRE9IbFZrbVJwR2FRa1JxdlE&hl=en#gid=0
Soundtrack:
Dead Rising 3 [Soundtrack] - 11. Seargent Battle Pt. 3 (Hilde Schmittendorf Boss Battle_Fight Theme)
Dead Rising 3 [Soundtrack] - 12. Pride Battle (Jherii Psychopath Boss Battle_Fight Theme)
What's a Perfect Walkthrough?
- Start game from Level 1 and beat game with True Ending
- Rescue all recruit-able survivor
- Complete all Side Missions (Will be skipping survivor's dialogue to finish on time. Time management is the key to this whole Walkthrough, Nightmare mode)
- Reach Level 50 within this playthrough
- Try Save all encounter Stranded Survivors (Which I did saved all, unless there's some I never encounter before)
- Try get as much Achievements within this Playthrough
Made a new gamertag just so I can track what achievement was obtained in this perfect walkthrough.
(Well I could get all the achievement except the "Be a Dick" achievement within this playthrough but I don't want to drag on the boring stuff. Will explain later on how.)
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Playlist: http://www.youtube.com/playlist?list=PL2uXDnbrgaa6gyb-nttHHxdHE6AU85uOA
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
H264 Video Codec @ 1280x720p 30FPS 8mb bitrate
AAC 44.1KHz 96,000bps Audio Bitrate
MP4 Container
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Sorry, I'm not registering a Google+ account so... no replies on comment section for me...
I can only reply private message only :(
h264 codec 在 kormaruR Youtube 的最讚貼文
Dead Rising 3: Nightmare Mode Perfect Walkthrough
Nightmare mode is the classic mode, where the timer runs at the old DR1 and DR2 speed.
Tips:
What's a Perfect Walkthrough?
- Start game from Level 1 and beat game with True Ending
- Rescue all recruit-able survivor
- Complete all Side Missions (Will be skipping survivor's dialogue to finish on time. Time management is the key to this whole Walkthrough, Nightmare mode)
- Reach Level 50 within this playthrough
- Try Save all encounter Stranded Survivors (Which I did saved all, unless there's some I never encounter before)
- Try get as much Achievements within this Playthrough
Made a new gamertag just so I can track what achievement was obtained in this perfect walkthrough.
(Well I could get all the achievement except the "Be a Dick" achievement within this playthrough but I don't want to drag on the boring stuff. Will explain later on how.)
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Playlist: http://www.youtube.com/playlist?list=PL2uXDnbrgaa6gyb-nttHHxdHE6AU85uOA
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
H264 Video Codec @ 1280x720p 30FPS 8mb bitrate
AAC 44.1KHz 96,000bps Audio Bitrate
MP4 Container
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
Sorry, I'm not registering a Google+ account so... no replies on comment section for me...
I can only reply private message only :(
h264 codec 在 Recommended upload encoding settings - YouTube Help 的推薦與評價
Audio codec: AAC-LC. Channels: Stereo or Stereo + 5.1; Sample rate 96khz or 48khz. Video codec: H.264. Progressive scan (no interlacing); High Profile ... ... <看更多>
h264 codec 在 cisco/openh264: Open Source H.264 Codec - GitHub 的推薦與評價
OpenH264 is a codec library which supports H.264 encoding and decoding. It is suitable for use in real time applications such as WebRTC. ... <看更多>