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• Flutter FFmpeg - [AVFilterGraph @ 0x88f4b300] No such filter : '"scale'

  9 septembre 2021, par Aryan Shandilya

  So, I am trying to combine an image and an audio file and convert it to a video using ffmpeg in flutter using flutter-ffmpeg but I am getting this error when I am trying to use executewithareguments() function.


  


  I am getting this error ->


  


  I suspected that maybe I should remove the double quotes but even that is giving an error. It would be very helpful if someone tells me what I am doing wrong.
Also, I was using min-gpl version of ffmpeg, I thought that was causing the problem, so I changed it to full-gpl but the error still remains. Any form of help would be great.

  


• "Automatic" switchable graphics on desktop, is there a way to disable them ?

  14 août 2021, par Hab-Land0

  Recently, I've updated my graphic drivers for a new system I built, a mix between an amd apu and an nvidia quadro. But I stumbled upon a rare problem, every time I tried to use OpenCL acceleration on ffmpeg for libx264 encoding, ffmpeg notifies me with the next line :

  


  [libx264 @ 0000028149222780] OpenCL acceleration disabled, switchable graphics detected


  


  When searching this line on ffmpeg's code, apparently occurs when the "main OpenCL driver" (if you can call it that) is redirected in such a way that tries to use both devices (Code).

  


  My obvious next step was to search everything I could around this "switchable graphics", but almost all the tutorials on websites told me that I should search around the driver's settings, but literally either Radeon Software or Nvidia's control panel don't display any option about it (It is worth to say that almost all of the tutorials refer to laptops with dedicated graphics and were very outdated).

  


  Another way I use OpenCL is for vapoursynth's filters, such as KNLMeansCL. And, when I make use of this filter, task manager detects that both AMD's APU and Nvidia's gpu are being used simultaneously (I guess that's how the switchable graphics actually works, and partially complementing why x264 OpenCL doesn't work).

  


  My main complain with this is that I attempt to use AMD as a display driver and let Nvidia do the hard work, and I actually was able to do that before updating my drivers. And, talking about the "updates" more in-depth, I updated nvidia's from "462.59" to "471.11" and, unfortunately, I can't remember what versions were my AMD drivers.

  


  Edit : the only way I can make full use of NVIDIA's card is by using it as my main display, but that also apparently disables AMD's igpu, I am not sure if its even able to be used on small tasks (like those that were previously mentioned)

  


• "No JPEG data found in image" when using ffmpeg concat

  7 juillet 2021, par bpgeck

  We are using FFMPEG for some image processing. We are attempting to concatenate a series of images into one single video file using ffmpeg concat, similar to what is described in this guide.

  


  Our full command is the following :

  


  ffmpeg -loglevel debug -y concat -safe 0 -i /tmp/infile.txt -pix_fmt yuvj420p -c:v libx264 -bsf:v h264_mp4toannexb /tmp/outfile.ts


  


  This infile.txt contains a list of the image file names and the duration that image should take up in the video :

  


  file /tmp/media/tmppjdk_2jd.jpg
duration 0.049911
file /tmp/media/tmptjuoz56b.jpg
duration 0.050015
file /tmp/media/tmpzywkxe16.jpg
duration 0.049960
...


  


  When running this command, however, I see the following error :

  


  [mjpeg @ 0x565013c4b800] No JPEG data found in image
Error while decoding stream #0:0: Invalid data found when processing input
[mjpeg @ 0x565013c4b800] No JPEG data found in image
Error while decoding stream #0:0: Invalid data found when processing input
[mjpeg @ 0x565013c4b800] No JPEG data found in image
Error while decoding stream #0:0: Invalid data found when processing input
[mjpeg @ 0x565013c4b800] No JPEG data found in image
Error while decoding stream #0:0: Invalid data found when processing input
...
opping st:0
DTS 243, next:3170350840000 st:0 invalid dropping
PTS 243, next:3170350840000 invalid dropping st:0
DTS 244, next:3170350880000 st:0 invalid dropping
PTS 244, next:3170350880000 invalid dropping st:0
DTS 245, next:3170350920000 st:0 invalid dropping
PTS 245, next:3170350920000 invalid dropping st:0
DTS 246, next:3170350960000 st:0 invalid dropping
PTS 246, next:3170350960000 invalid dropping st:0
DTS 248, next:3170351000000 st:0 invalid dropping
PTS 248, next:3170351000000 invalid dropping st:0


  


  Any ideas on how I can properly debug this ?