The only metadata which will round-trip ATM is color info (matrix coeficients, color primaries, transfer characteristic, color range) from MKV to MKV in copy mode.Ĭontainer DAR was created for anamorphic (DVD) videos yes. Meaning a mp4 file with a rotation tag doesn't get auto-rotated when it is opened in avidemux.Ĭorrect, this is by design. Quote from: butterw on January 02, 2021, 11:05:40 PMI've checked rotation and it doesn't round-trip. Quote from: butterw on January 02, 2021, 11:05:40 PMOne thing missing seems to be a 9/16 DAR (increasingly popular in mobile/internet videos).Īs you noticed later down the post, this one simply doesn't exist. This setting in the muxers creates anamorphic video, yes. You have to be near the desired ratio to apply DAR, otherwise you get a significant AR error. Quote from: butterw on January 02, 2021, 11:05:40 PMYou also need to know the output AR to use DAR. The whole complexity arises only from anamorphic video. If you work with square pixels only, why are you concerned about aspect ratio at all? Whatever dimensions you set will work right, just keep aspect ratio locked. The menus apply a factor to width or height in pixels to account for PAR specific to selected scenario. Quote from: butterw on January 02, 2021, 11:05:40 PMI don't know what the buttons at the top of the interface do. If you never need to create a DVD video or work with output of HDV camcorders, this is fine. Quote from: butterw on January 02, 2021, 11:05:40 PMI only use square pixels (PAR=1 ?) Is mp4 container DAR preserved though a basic remux with ffmpeg, or a conversion to mkv ? If the user goes through the trouble of setting parameters, they need to stick by default. Meaning a mp4 file with a rotation tag doesn't get auto-rotated when it is opened in avidemux. I've checked rotation and it doesn't round-trip. I do personally prefer mod-16 exact ratios: no possible issues down the line (video players, muxers, editors, etc.). I don't know what display width does in avidemux. One thing missing seems to be a 9/16 DAR (increasingly popular in mobile/internet videos). Output Format > configure > DAR is in a different somewhat hidden, interface so it seems easy to forget about. You also need to know the output AR to use DAR. Quote Quote from: butterw on January 02, 2021, 08:32:14 PMCurrently to get the desired result you have too know the right output resolutions.By specifying the desired display aspect ratio or display width in muxers which support this (MKV, WebM, MP4 and MOV), the necessary pixel aspect ratio is automatically calculated based on pixel size of the source. The error X/Y display is one thing that does work well in this interface. This output display would avoid having to copy/paste out the values and manually calculate the AR for each suggested set of values. Probably the output Width/Height*PAR should be displayed if possible. I only use square pixels (PAR=1 ?) I don't know what the buttons at the top of the interface do. It wouldn't be difficult to show (storage width / storage height) as a float, but how should this help the user? For the use case of output display using square pixels only? Quote from: eumagga0x2a on January 02, 2021, 08:53:00 PM Quote from: butterw on January 02, 2021, 08:32:14 PMMaybe adding a textbox to the right of error X/Y with the output Aspect Ratio would be feasible ?
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