Have a read through this to read more on a few other examples! DAR refers to the viewable image dimensions, PAR refers to the physical dimensions of each pixel, and SAR refers to the number of horizontal versus vertical pixels. With digital, several types of aspect ratios exist: the display aspect ratio (DAR), the pixel aspect ratio (PAR) and the storage or sample aspect ratio (SAR). Here I have a piece of H264 Video playing in FFplay, I can see from the FFmpeg console that it has a 720×240 pixel size but with a SAR of 1:2 which results on a DAR of 3:2.

Suppress the module from adding the –s paratmeter.FFplay retains the vertical size but reduces the horizontal by half Note that setdar accepts a floating point string.įinally, stop –s parameter from being added Syntax for pad is A:B:C:D where A,B,C and D must all be whole integers. Syntax for scale is WIDTHxHEIGHT and WIDTH and HEIGTH must both be whole integers. going from HD to Cinematic, therefore top and bottom pad is required)įirst we scale the original video – width is the determining factor Then NO –vf parameter is required and using the existing –s parameter generated by the module. source and output video have the same aspect ratio) SAR = Source Aspect Ratio = OW/OH (floating number)ĭW = Width of destination (Preset) Output video (must be integer)ĭH = Height of destination (Preset) Output video (must be integer)ĭAR = Destination Aspect Ratio = DW/DH (floating number) OH = Height of original uploaded video (must be integer) OW = Width of original uploaded video (must be integer) The files are from a previous dev version of the module but I hope this helps. I've attached copies of my TranscoderAbstractionFactoryFfmpeg.inc and which I believe add the padding correctly based on the calculation methods below. Not quite right - I converted a 720x576 (4:3) video to 854x480 (16:9) using a preset with 'Pad' for the aspect mode and the resulting video has some left/right padding added to it but not enough and picture seem slightly stretched horizontally - it comes out at 854x525 which is not 16:9.

Ffmpeg resize