[FFmpeg-user] setdar ratio - syntax
ben at bbarker.co.uk
Sun Nov 25 13:28:32 EET 2018
Sorry....typo on my part - I meant "dar" not "ratio"
So I now have "setdar=dar=x/y"
It seems that "setdar=x/y" would also work in exactly the same way
However, "setdar=x:y" will not work, though it used to. Doesn't matter -
it's working now!
On Sun, Nov 25, 2018 at 11:12 AM Ben Barker <ben at bbarker.co.uk> wrote:
> Yep - just checked:
> Slashes do indeed work as expected, even if the "ratio" parameter is left
> out. However, I have left the "ratio" in for the moment, since it is what
> the manual suggests, so less likelihood of future problems!
> On Sun, Nov 25, 2018 at 8:44 AM Kieran O Leary <kieran.o.leary at gmail.com>
>> On Sun, Nov 25, 2018 at 8:02 AM Gyan Doshi <gyandoshi at gmail.com> wrote:
>> > On 25-11-2018 06:45 AM, Kieran O Leary wrote:
>> > > I tried to search through the commit history but didn't have enough
>> > > time and knowledge to figure out when this happened.
>> > > I don't see why the previous usage needed to change.
>> > Since ':' is used to delimit options within filters, the colon should
>> > escaped and the string quoted i.e. 'X\:Y', which works for me.
>> Of course, my bad - I think I was posting too late ;) Thanks Gyan.
>> I just checked my scripts and I never use colons as the delimiter, I
>> use slashes:
>> $ ./ffmpeg -f lavfi -i testsrc -vf scale=720/576,setdar=4/3 -t 1 ratio.mov
>> ffmpeg version N-92521-g737b5f5869 Copyright (c) 2000-2018 the FFmpeg
>> built with gcc 7 (Ubuntu 7.3.0-27ubuntu1~18.04)
>> libavutil 56. 24.101 / 56. 24.101
>> libavcodec 58. 40.100 / 58. 40.100
>> libavformat 58. 23.100 / 58. 23.100
>> libavdevice 58. 6.100 / 58. 6.100
>> libavfilter 7. 46.100 / 7. 46.100
>> libswscale 5. 4.100 / 5. 4.100
>> libswresample 3. 4.100 / 3. 4.100
>> Input #0, lavfi, from 'testsrc':
>> Duration: N/A, start: 0.000000, bitrate: N/A
>> Stream #0:0: Video: rawvideo (RGB / 0x18424752), rgb24,
>> 320x240 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
>> File 'ratio.mov' already exists. Overwrite ? [y/N] y
>> Stream mapping:
>> Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
>> Press [q] to stop, [?] for help
>> Output #0, mov, to 'ratio.mov':
>> encoder : Lavf58.23.100
>> Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 720x576
>> [SAR 16:15 DAR 4:3], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
>> encoder : Lavc58.40.100 mpeg4
>> Side data:
>> cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
>> frame= 25 fps=0.0 q=1.9 Lsize= 127kB time=00:00:00.96
>> bitrate=1079.9kbits/s speed=15.6x
>> video:126kB audio:0kB subtitle:0kB other streams:0kB global
>> headers:0kB muxing overhead: 0.797990%
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