Read and write raw PCM using GStreamer

最新推荐文章于 2025-09-10 19:09:29 发布

转载最新推荐文章于 2025-09-10 19:09:29 发布 · 1.7k 阅读

本文介绍了如何利用GStreamer管道进行PCM音频的编码与解码操作。具体包括将WAV文件转换为PCM格式、批量转换多个WAV文件、将PCM转换回WAV格式、播放PCM文件以及使用xxd工具创建PCM数据的C数组。

Embedded developers have a frequent need to encode or decode PCM audio. In this post I show some GStreamer pipelines that can help with that task.

Convert WAV to PCM

 
   
        gst-launch filesrc location=
        file
        .wav ! wavparse ! audioresample ! audioconvert ! audio
        /x-raw-int
        , rate=8000, channels=1, endianness=4321, width=16, depth=16, signed=
        true 
         ! filesink location=
        file
        .pcm
       
 
 

For bulk conversion

 
   
        ls 
         *.wav | 
        xargs 
         -i -n 1 gst-launch filesrc location=
        '{}' 
         ! wavparse ! audioresample ! audioconvert ! audio
        /x-raw-int
        , rate=8000, channels=1, endianness=4321, width=16, depth=16, signed=
        true 
         ! filesink location=
        '{}'
        .pcm
       
 
 

Convert PCM to WAV

 
   
        gst-launch filesrc location=
        file
        .pcm ! audio
        /x-raw-int
        , rate=8000, channels=1, endianness=4321, width=16, depth=16, signed=
        true 
         ! audioconvert ! audio
        /x-raw-int
        , rate=8000, channels=1, endianness=1234, width=16, depth=16, signed=
        true 
         ! wavenc ! filesink location=
        file
        .wav
       
 
 

Play PCM

 
        gst-launch filesrc location=
        file
        .pcm ! audio
        /x-raw-int
        , rate=8000, channels=1, endianness=4321, width=16, depth=16, signed=
        true 
         ! pulsesink

Use xxd to create C array of PCM data

 
        xxd 
         -i 
        file
        .pcm > voice.c

转自：https://delog.wordpress.com/2011/10/04/read-and-write-raw-pcm-using-gstreamer/