Score of 1

1 answer

110 views

AAC from HLS TS causes clicks when decoded to PCM per segment

I'm working on a custom HLS audio player for iOS. Each .ts segment contains AAC audio. I extract AAC from each TS file, decode it to PCM (using FFmpegKit), and schedule it using AVAudioEngine. ❗ ...

Score of 0

1 answer

55 views

Intra prediction for edge boundary block

What would be the values of (A, B, C, D, M, I, J, K, L) for the top left-upper block (edge block) in H.264/AVC intra-prediction? image 1: Intra block layout The second picture shows that, in this ...

Score of 1

0 answers

188 views

How to convert MPEG2-TTS to MPEG2-TS format to playback using ffplay

I know some OSS such as ffmpeg or gstreamer don't support to play-back MPEG2-TTS stream. Then, I tried to convert 192 bytes TTS packet to 188 bytes TS packet by deleting first 4 bytes like: def ...

Score of 0

0 answers

279 views

How to correctly encrypt the I-frames in video files?

I'm trying to encrypt only the I-frames of a video file so that the energy overhead is lessened compared to if I tried to encrypt the whole file. However, after encrypting what I thought were the I-...

Score of 0

0 answers

103 views

How to play audio from a stream that contains a MPEG file?

My program receives MPEG audio as a stream and I want to play that stream as soon as it's received by the app. I am already familiar with SoundPlayer but it only supports .wav files and I've seen ...

Score of 0

1 answer

379 views

Convert 10 bit number to mantissa-exponent and vice-versa

From: ST 2022-3:2010 - SMPTE Standard https://ieeexplore.ieee.org/document/7290021 How do I understand and do this: Maximum_bit_rate (Mode 1 only): This field shall contain a 10-bit number where the ...

Score of 0

2 answers

789 views

How to get better video quality using Accord.Video.FFMPEG.DLL

I have developed a Visual Studio Winapp that produces a video file utilizing Accord.Video.FFMPEG.DLL. The quality the video is less than the original images. Here is the code and then a sample ...

Score of 2

1 answer

966 views

How to turn binary from server back into audio file?

I am using express's res.sendFile() to send an .mp3 file from my server to my client as a response to a post request. I have been unable to transform the string of data (binary, I think?) back into a ...

Score of 2

1 answer

316 views

Is it possible to stitch MP3 frames together?

I'm working with CBR, no bit reservoir, 192k bitrate, and 48k sample rate MP3 files. CBR + 192k bitrate + 48k sample rate gives a clean 576 bytes per frame. No bit reservoir is to make each frame ...

Score of 2

1 answer

298 views

How to know the byte offset of a specific CBR MP3 frame?

I created my own MP3 frame parser. I can read each frame individually if I do it sequentially. My problem is that I have yet to figure out how to find the byte offset of the nth frame (without having ...