On 1/20/16, Stephane Poirier <[email protected]> wrote: > Hi All, > > I am new to ffmpeg library and modified muxing.c demo (written by > Fabrice Bellard) so I gather audio from a file using libsndfile and > create frames (based on audio) in AV_PIX_FMT_RGB24 format. It currently > encode the stream pix format with AV_PIX_FMT_YUV420P. > > Here's my code: > http://www.oifii.org/ns-org/nsd/ar/cp/audio_spi/spiffmpegmuxingspectrum_qt2016/spiffmpegmuxingspectrum_qt2016.c
Why are you not using av_fft for FFT and libavformat for processing sound files? By the way ffmpeg can already encode losslessly audio spectrum. > > My question is: How can I encode lossless .mp4? Do I have to change the > stream pix format to AV_PIX_FMT_RGB24? Do I have to install a codec that > support that pix format? Using lossless video encoder which support RGB24. For .mp4 I think only lossless mode from h264 codec is possible. _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
