[FFmpeg-user] Ffmpeg hardware acceleration unsupported formats betwen transpose and auto_scaler_0

Def Etienne shaker.doc at gmail.com
Thu Aug 19 17:46:44 EEST 2021

Sent from my iPhone

> On 19 Aug 2021, at 14:41, eduard_poe2000--- via ffmpeg-user <ffmpeg-user at ffmpeg.org> wrote:
> Greetings
> Any ideeas regarding this issue?
> Sent from Yahoo Mail on Android 
>  On Wed, 11 Aug 2021 at 15:15, Eduard-Gabriel Poesina via ffmpeg-user<ffmpeg-user at ffmpeg.org> wrote:   Greetings!
>     I am trying to develop a transoding service which makes use of nvidia hardware acceleration capabilities ( The gpu used in this process is a Tesla T4); I want to generate a mpeg-dash playlist for my video so that i can stream it;
> ```
>     ffmpeg -y -hwaccel cuda -hwaccel_output_format cuda -i mobil1.mp4 -c:v h264_nvenc -c:a aac  \
>     -map v:0 -b:v:0 1000k -maxrate:0 1500k -bufsize:0 2500k -filter:v:0 "scale_npp=1920:1080:force_original_aspect_ratio=decrease" -map 0:a -b:a 128k \
>     -f dash dash.mpd
> ```
> But when mobile videos are uploaded ( which have rotation metadata ) I encounter the following error:
> ```
> Impossible to convert between the formats supported by the filter 'transpose' 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
> ```
> How can i solve this issue?

You can use a filter chain and rotate it therein. 
So you might need a script  to determine which ones need rotation. 


> I am using the following docker image:
> jrottenberg/ffmpeg:4.4-nvidia

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