[FFmpeg-user] Error:Impossible to convert between the formats supported by the filter..

[tasos]

Hello.
I'm using git latest version of ffmpeg.
First of all i don't want to change pixel format.
I was just reading that inserting it is better.I should find the source.

Well hwupload_cuda with scale_npp can be found on different sites on the 
Internet.
I suppose they were using an older version or something.
Moreover i can understand that the patch that i was talking about
was inserted in ffmpeg and there is no need to talk about it.

So
a) How do you propose to deinterlace,because as i have said
deinterlacing is my main problem right now!
b) Moreover i think i should use

>     -vf  "scale_npp=w=1280:h=-1:format=yuv420p:interp_algo=lanczos,hwdownload"

Right?

Thanks again!


On 7/30/2017 1:32 AM, James Girotti wrote:
> On Jul 29, 2017 1:04 PM, "tasos" <tasoss at trigonongroup.com> wrote:
>
> Hello again Sir!
> I was avoiding to disturb you but i can't find a solution on my problem
> again!
>
>
> Please email the list and not me directly. I would like for the whole
> community to be involved.
>
> First of all,my sources are interlaced so i want to deinterlace them.
> Every time i use
> time ffmpeg -y -hwaccel cuvid -c:v h264_cuvid  -deint 1 or -deint 2
> the resulted video stalls/freezes then continues and this goes on and on.
>
>
> I have not done deinterlacing with cuda h264 decoder. I have not had good
> results from the adaptive deinterlacing and mixed results with bob if the
> source isn't >75% interlaced.
>
> That part of your command looks fine, but I usually use words for the
> -deint argument instead of numbers, shouldn't be a problem though.
>
>
> So i have 2 questions.
> 1)How can i perform proper deinterlacing , i suppose using cuda/hardware.
> 2) Every time i run the following
>
>
>   time ffmpeg -y -hwaccel cuvid -c:v h264_cuvid  \
>      -i http://85.196.57.134:8001/1:0:1:1:0:0:0:0:0:0: \
>     -strict experimental  \
>     -vf  "hwupload_cuda,scale_npp=w=1280:h=-1:format=yuv420p:
> interp_algo=lanczos,hwdownload,format=yuv420p" \
>     -c:v h264_nvenc \
>     -zerolatency true \
>     -preset ll \
>     -r 25 -g 50 -qmin 1 -qmax 50 \
>     -b:v 1M -maxrate 1M -bufsize 2M \
>     -codec:a aac -b:a 64k   \
>     -f flv rtmp://foobar
>
> i get again the same old error!
>
>
> Impossible to convert between the formats supported by the filter 'graph 0
> input from stream 0:0' and the filter 'auto_scaler_0'
>
>
> Error reinitializing filters!
> Failed to inject frame into filter network: Function not implemented
> Error while processing the decoded data for stream #0:0
>
>
> Your filter order is mixed-up. Scale-npp filter uses cuda context. So you
> don't have to hwdownload or hwupload_cuda for just scale-npp.
>
> Sorry, I'm away from my computer, does scale-npp have an option for format?
> Also, unless you are changing format, I don't think you have to include
> that as your source is yuv420p. Anyway, you have the same problem as
> before. The last format statement in your filter parameters would be a
> software filter, see my last email if you really want to change pixel
> format.
>
>
> Of course if i remove hwupload_cuda then everything works fine.
> I have used scale_npp because i wanted to scale on hardware and now i can't
> use it(or at least hwupload_cuda is not accepted).
> What am i doing wrong?
>
>
> Thank you very much and if you want me to post this email on the mailing
> list please let me know(so people will know that you have answered my
> question again).
>
> ps:I was reading http://developer.download.nvidia.com/compute/redist/
> ffmpeg/1511-patch/FFMPEG-with-NVIDIA-Acceleration-on-Ubuntu_UG_v01.pdf
> and there is a patch for ffmpeg http://developer.download.
> nvidia.com/compute/redist/ffmpeg/1511-patch/ffmpeg_
> NVIDIA_gpu_acceleration.patch
> in order to enable the  --enable-nvresize option. Of course this patch is
> for a specific git commit(2015).I was wondering about nvresize and if you
> know something more.
>
>
>  From what I've read nvresize is the same as scale-npp or it was depricated.
> It certainly is in newest ffmpeg version.
>
> That said:
>
> I'm way ahead of myself. I should have asked in the beginning which version
> of ffmpeg you're using. My answers will depend on your version. Also, send
> the output of:
>
> ffmpeg -h decoder=h264_cuvid
>
> And
>
> ffmpeg -h filter=scale_npp
>
> -J
>
> On 7/25/2017 1:24 AM, James Girotti wrote:
>
>
>
> On Mon, Jul 24, 2017 at 2:57 PM, tasos <tasoss at trigonongroup.com> wrote:
>
>> Hello and thanks for replying.
>> Your information is very useful and i thank you!
>>
> You're welcome!
>
> My colleague uses an older version of ffmpeg and the specific combination
>> (including pix_fmt)
>>
>>> ffmpeg -y -hwaccel cuvid    -c:v h264_cuvid
>>>
>> works without any errors.That was my question.I thought i was doing
>> something wrong or whatever.So i suppose that something has changed
>> from his version until mine(git latest).
>> So i have removed -pix_fmt yuv420p and everything works fine.
>> I also would like to search about the hwdownload option you have entered.
>>
> This is important if you want to use any software video filters.
>
>
>> I don't want to change the pixel format(i don't know why you have thought
>> about it).
>>
> Just in case you were trying to change pixel format, I couldn't tell from
> your initial email.
>
>
>> Is this the correct way to go?
>>
>>> ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -deint 1 -vsync 1 -timeout
>>> 999999 -i foo \
>>> -map 0:v -c:v h264_nvenc -preset slow -profile:v high -b:v 1300k  -map
>>> 0:a:0 -c:a libfdk_aac -ac 2 -b:a 64k -strict experimental  \
>>> -f flv bar
>>>
> It looks fine as far as full hardware transcoding. I did get an error that
> there is no such option '-timeout', so you might also encounter that. And
> of course you can tweak the other parameters to your use-case, i.e. bitrate
>
>
>> Thanks again for your reply it was very useful and answered my question :)
>>
> Good luck! I'll try to help if you have any more problems.
>
> -J
> _______________________________________________
> ffmpeg-user mailing list
> ffmpeg-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-user
>
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".