{"action":"created","issue":{"url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/2","repository_url":"https://api.github.com/repos/Xaymar/ffmpeg","labels_url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/2/labels{/name}","comments_url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/2/comments","events_url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/2/events","html_url":"https://github.com/Xaymar/ffmpeg/issues/2","id":279668364,"number":2,"title":"Not working cbr and vsync vfr","user":{"login":"GooG2e","id":6186582,"avatar_url":"https://avatars3.githubusercontent.com/u/6186582?v=4","gravatar_id":"","url":"https://api.github.com/users/GooG2e","html_url":"https://github.com/GooG2e","followers_url":"https://api.github.com/users/GooG2e/followers","following_url":"https://api.github.com/users/GooG2e/following{/other_user}","gists_url":"https://api.github.com/users/GooG2e/gists{/gist_id}","starred_url":"https://api.github.com/users/GooG2e/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GooG2e/subscriptions","organizations_url":"https://api.github.com/users/GooG2e/orgs","repos_url":"https://api.github.com/users/GooG2e/repos","events_url":"https://api.github.com/users/GooG2e/events{/privacy}","received_events_url":"https://api.github.com/users/GooG2e/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":14,"created_at":"2017-12-06T08:37:12Z","updated_at":"2017-12-11T07:21:42Z","closed_at":null,"author_association":"NONE","body":"Hello!\r\nI found some bugs with converter parameters in your version of ffmpeg.\r\nI convert 2 videos (different) with same parameters \r\n`-cbr true -rc:v cbr -vsync vfr -refs:v 4 -b:v 1700k -c:a libfdk_aac -b:a 196k -ar 44100`\r\nOne I have converted with nvenc (cpu gives same result) and other with amf.\r\nhere is the difference https://puu.sh/yAtcA/49237471a8.png\r\nAs you can see - amf doesn't work properly with constant bitrate video and variable frame rate.\r\nIf you need I can convert the same video with cpu or nvenc to prove results"},"comment":{"url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/comments/350641496","html_url":"https://github.com/Xaymar/ffmpeg/issues/2#issuecomment-350641496","issue_url":"https://api.github.com/repos/Xaymar/ffmpeg/issues/2","id":350641496,"user":{"login":"GooG2e","id":6186582,"avatar_url":"https://avatars3.githubusercontent.com/u/6186582?v=4","gravatar_id":"","url":"https://api.github.com/users/GooG2e","html_url":"https://github.com/GooG2e","followers_url":"https://api.github.com/users/GooG2e/followers","following_url":"https://api.github.com/users/GooG2e/following{/other_user}","gists_url":"https://api.github.com/users/GooG2e/gists{/gist_id}","starred_url":"https://api.github.com/users/GooG2e/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GooG2e/subscriptions","organizations_url":"https://api.github.com/users/GooG2e/orgs","repos_url":"https://api.github.com/users/GooG2e/repos","events_url":"https://api.github.com/users/GooG2e/events{/privacy}","received_events_url":"https://api.github.com/users/GooG2e/received_events","type":"User","site_admin":false},"created_at":"2017-12-11T07:21:42Z","updated_at":"2017-12-11T07:21:42Z","author_association":"NONE","body":"May be this is needed for 1 simple reason - 2 previous codecs is working this way (cpu and nvidia).\r\nWhy this codec is working differently?\r\nSwitch on logic - if convert video with the same parameters then in output I must receive videos with same parameters (video characteristics, headers and etc.). One exclusion that default parameters may differ, but if I set this parameter then I must receive it in output. Others mean that encoder doesn't work well. Don't you think so?"}}
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