Isn't this behaviour different from what the documentation suggests or is my understanding of the documentaion wrong.

So to get the size per plane, I have to do pFrame->lineSize / pFrame->channels. However, pFrame->lineSize is giving 8192. As such lineSize should be 4096 for planar audio. Pretty straightforward, as each sample is 4 bytes and since there are 2 channels total memory will be (1024 * 4 * 2) bytes.

ffmpeg -i input.mp4 -filter:v 'cropw:h:x:y' output.mp4. 'w:h:x:y' represents the width, height, and position of the frame respectively. Crop specifies the filter you need here is the crop filter. ffmpeg -i /audiosource/music.wav -filtercomplex 'tremolof1:d0.8' atremolooutmusic.wav: avibrato. Name Sample Notes Commands origin: None: None: tremolo output : sinnusoidal amplitude modulation. In this case, -filter:v indicates the filter is for the video. /arnnout.wav -filtercomplex 'rubberbandtempo1.5' rubberout.wav: atremolo. As such lineSize 0 should be 4096 for planar audio. Int data_size = av_samples_get_buffer_size(NULL, iDesiredNoOfChannels, iAudioSamples, (AVSampleFormat)iDesiredFormat, 0) For iDesiredNoOfChannels = 2, iAudioSamples = 1024 & iDesiredFormat = AV_SAMPLE_FMT_FLTP data_size=8192. Use the command below to crop the frame in any dimension you want. Pretty straightforward, as each sample is 4 bytes and since there are 2 channels total memory will be (1024 4 2) bytes. i is specifying the input video that will be cropped. This command is the same as the one used for cropping images we have just changed the input and output to mp4.

the timestamp start will be the first frame in the output. Below mentioned is the general structure of the command. '''Trim the input so that the output contains one continuous subpart of the input. But however, am unsure whether lineszie is holding per plane buffer size or is it the complete buffer size and we have to divide it by no of channels to get per plane buffer size. '''Change the PTS (presentation timestamp) of the input frames. Or you could use it against those annoying white flashes. That said, this is a new video filter that may help photosensitive people watch tv, play video games or even be used with a VR headset to block out epiletic triggers such as filtered sunlight when they are outside. The align parameter to this avimagegetbuffersize function is. As per the doucmentation of AVFrame, for audio, lineSize is size in bytes of each plane and only linesize may be set. FFmpeg and its photosensitivity filter are not making any medical claims. Some parts of FFmpeg, notably libavcodec, require aligned linesizes, which means that it requires: This allows it to use fast/aligned SIMD routines (for example SSE2/AVX2 movdqa or vmovdqa instructions) for data access instead of their slower unaligned counterparts.

Ffmpeg filters linesize