[FFmpeg-user] differences between -vf and -filter_complex

[Dave Rice]

> On May 10, 2017, at 2:13 PM, Paul B Mahol <onemda at gmail.com> wrote:
> 
> On 5/10/17, Dave Rice <dave at dericed.com <mailto:dave at dericed.com>> wrote:
>> Hi ffmpeg-user,
>> 
>> In some cases I've been using -vf and -filter_complex interchangeability but
>> notice that some behavior is unexpectedly different.
>> 
>> For instance if I use format=yuv422p10le within -vf and within
>> -filter_complex the output is different. Is there something else I should
>> add to the filterchain to get consistent results.
>> 
>> Below is the output of:
>> ffmpeg -f lavfi -i testsrc2=r=1:d=5             -vf format=yuv422p10le -f
>> framemd5 -
>> and
>> ffmpeg -f lavfi -i testsrc2=r=1:d=5 -filter_complex format=yuv422p10le -f
>> framemd5 -
> 
> Both commands are suboptimal, use:
> 
> ffmpeg -f lavfi -i testsrc2=r=1:d=5,format=yuv422p10le -f framemd5 -

I usually avoid lavfi formatted inputs when I can, because IIUC there's no method to preserve frame interlacement data from the input through the filterchain. See https://trac.ffmpeg.org/ticket/4057.
Dave Rice