filmstro / filmstro_ffmpeg Goto Github PK

I am not sure, if the decoder converts the sample format. There is an option AVCodecContext.request_sample_fmt, but it says "Decoder will decode to this format if it can."
So better handle that explicitly.

Hi,
I'd like to test AnimationWriter example as I need to do something similar in my project. I'm using precompiled 4.3.2 ffmpeg binaries for windows x64.

I've got memory exception on sws_scale() call.

            uint8_t* source[4] = {data.data, nullptr, nullptr, nullptr};
        	
            sws_scale (scalerContext,
                       source,
                       inLinesizes,
                       0,
                       image.getHeight(),
                       frame->data,
                       frame->linesize);

If I change the code this way:

            sws_scale (scalerContext,
                       (uint8_t const * const *) data.data,
                       inLinesizes,
                       0,
                       image.getHeight(),
                       frame->data,
                       frame->linesize);

Video is exported but only a green screen appears.

Any kind of help is really appreciate.

Thank you in advanced.

I realize this isn't the most maintained repo on github, but it was perfect for hacking together a project. At the moment I'm scratching my head around how VideoReader::setNextReadPosition is supposed to work, I can't get a slider to work as a seek control reliably. If you check out the VideoPlayer example the same issue is present, jumping back and forth in the video with cause the video stream to hang, in debug configuration the message "No Frame Available" is continuously printed to the terminal, meanwhile the audio stream is unaffected.

Not sure where to start looking to fix this.

Howdy. Just curious if this will ever be implemented. it would be EXTREMELY handy!

https://github.com/filmstro/filmstro_ffmpeg/blob/master/modules/filmstro_ffmpeg/filmstro_ffmpeg_FFmpegVideoWriter.cpp#L324

void FFmpegVideoWriter::writeNextVideoFrame (const juce::Image& image, const AVRational timestamp) { // TODO: use scaler and add interface for image processing / e.g. branding }

Thank you so much for creating this API! ffmpeg is not easy to use!

There are too many combinations, and some of them only work on certain players.
It would be good to have a preset, like "MP4:H264:AAC" or other common accepted formats.