Am 22.12.2015 um 21:10 schrieb jd1008:
On 12/22/2015 12:46 PM, Reindl Harald wrote:Am 22.12.2015 um 20:41 schrieb jd1008:On 12/22/2015 12:32 PM, Reindl Harald wrote:I would like to add -s '1920x1080'how does 1920x1080 makes sense when your destination size is 320x180?So, would changing -vf 'scale=320:176,setdar=16/9,pad=320:180:0:2:000000' to -vf 'scale=1920:1080' be enough to get full HD resolution, or would that make the image lose clarity, definition and sharpness??yes, if the inout format is Ok "-vf 'scale=320:176,setdar=16/9,pad=320:180" make black borders on the correct sides and si calculated by the script generating the ffmoeg-call because to have exactly 320x180 on a website from the input file used you need themSorry Reindl, I lost you. Do I understand I still need to provide the input scale, of "-vf 'scale=320:176,setdar=16/9,pad=320:180" ...
why would you need to provide the input sclase
and for output provide -vf 'scale=1920:1080' ? Really confused now.
about what?
I have a vid that is of lower scale and need to expand it to 1920x1080 and hopefully not ruin the definition, sharpness ... etc too much. Video input is (per ffplay): Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 278 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default) and mplayer reports: VIDEO: [H264] 640x360 24bpp 29.970 fps 278.1 kbps (33.9 kbyte/s) So I would obviously need to increase the bitrate but not sure to what, nor am I sure if I need to specify what the input 'vf' values are and then provide the output vf values
you just need to play around with the bitrate especially when you upsacle -vf is *not* about the bitrate step back to my first response and look at the other params too
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