[Libav-user] How to do delay load on MacOS

2014-05-06 Thread YIRAN LI
Hi, I'm trying to build ffmpeg with some external libraries for Mac. I'd like to build dynamic libraries, and also I want to do delay load. So external libraries will only be needed when they're actually referenced by ffmpeg. I'm not family with MacOS and I only know there's things called weak-l

Re: [Libav-user] Saving frame to file

2014-05-06 Thread Jorge LĂșcio
2014-05-05 3:45 GMT-03:00 Carl Eugen Hoyos : > It takes place in the filter phase, depending on where > you put the "scale" filter. > Nice to know, but I have used another filter, the "lutrgb" to convert the frames before they were applied to my filter. Now it is working fine. __

Re: [Libav-user] Saving frame to file

2014-05-06 Thread Carl Eugen Hoyos
Jorge LĂșcio writes: > I was using the "-pix_fmt rgb24" option, so I thought > the frame was already RGB. Probably this conversion > only takes place after the filter phase. It takes place in the filter phase, depending on where you put the "scale" filter. Please do not top-post here, it is c

[Libav-user] Unable to enable audio filter?

2014-05-06 Thread Ricky Huang
Hello all, Due to dependency issues, I am running ffmpeg 0.7.16. I am writing a custom audio filter for ffmpeg for my research. Naturally I start out with the simplest one for reference, "anullsink" (there are really only 3 in this version anyways - anullsink, anullsrc, and anull). However I

[Libav-user] empty buffer before av_read_frame

2014-05-06 Thread Solmaz Ghaznavi
I am trying to scan video frames (h264) by calling av_read_frame repetitively to get to a specific I frame and decode from there without decoding previous frames (I don't want to decode frames that I don't care about). But I think av_read_frame buffers the compressed video frames until they are dec