Streaks in Movie

Hello,

I have been searching a while for the answer to this question and have not had any luck yet. Hopefully I did not miss something.

I am using imagemagick convert to combine a jpg onto a png image (final image is a png). I then try and make a movie out of these images using ffmpeg. In the resultant movie (not the images) there are yellow streaks across the image.

http://reels.creativecow.net/film/streaks-in-resultant-movie

Thanks for the help!

[Adam Theisen] "The latest I have found out is after I use the convert command, the color table from the metadata is not available."

I have had issues with this in the past....

I fixed it by running another convert command to set the colorspace.

Example:
$ convert input.png -type TrueColorMatte output.png

Give it a go and try a few different colorspaces to see if this helps.

Michael

[Adam Theisen] "I was able to get it to work, but only for the grayscale colorspace. The other spaces are still leaving me with streaks in the final movie and an empty color table when I read it in."

Can you post some of these images so I can try to replicate? I am intrigued now;-)

Michael

...and a sample of your FFmpeg command line? (codec, bitrate etc.)

ahhhh, ok.

[Adam Theisen] "ffmpeg -f image2 -bufsize 12000.0k -i image_%2d.png -y -r 20 -sameq movie.mov"

Why are you setting bufsize on the input? Firstly, try to remove this.

[Adam Theisen] "ffmpeg -f mov -i movie.mov -vcodec libx264 -fpre /apps/base/share/ffmpeg/libx264-normal.ffpreset -bufsize 12000.0k -b 3000k -minrate 500 -y movie.mp4"

Again, not sure why you are setting bufsize here either? The streaks you are getting could very easily be caused by buffer overflows.

Also, from this command line, I can determine that it may be time to upgrade to a more recent version. -fpre for libx264 is now deprecated and -preset is used to directly access x264 presets. I am running a very recent version which comes with NO x264 preset files in the ffprests folder (only vpx presets)

Michael

[Adam Theisen] "
I did remove it and tried it, but I was still seeing streaks, even in the original .mov file."

OK. This helps narrow down the problem to your intermediate.

As you are not specifying a codec here, FFmpeg uses a default for the container which is most likely mpeg4 (divx variety not x264 variety).

I use .mpg with -sameq for my intermediates which does result in near lossless large files.

All you would need to do is change .mov to .mpg in your example and FFmpeg will get the codec right.

eg.
$ ffmpeg -f image2 -i image_%2d.png -y -r 20 -sameq movie.mpg

If the streaks are still there after that, there is another upstream issue but we are getting closer;-)

Michael

Hello,

I was able to get this to work, but I had to write out to a jpg format instead of png. Not really a big deal on my end, but now the streaks are gone. It took a little bit to get the correct colortable with IDL, but it works now.

Thanks for all the help!