# 多格式编码/解码

Source: [https://docs.qualcomm.com/doc/80-70014-50Y/topic/gst-videocodec-concurrent-playback.html](https://docs.qualcomm.com/doc/80-70014-50Y/topic/gst-videocodec-concurrent-playback.html)

此 **gst-videocodec-concurrent-playback** 程序支持 AVC（H.264）和 HEVC（H.265）视频的并发视频播放。它演示了 Qualcomm Linux 视频引擎的并发解码能力，可以同时处理不同的视频编解码器。

如图所示，示例程序使用 H.264 和 H.265 视频，两者都封装在 MP4 容器中。此 pipeline 涉及用于并发视频播放的多个组件。有关这些组件的更多信息，请参阅 [Pipeline 流程](https://docs.qualcomm.com/doc/80-70014-50Y/topic/gst-videocodec-concurrent-playback.html#gst-concurrent-videoplayback__section_w2j_yvf_4bc)。

Figure : gst-videocodec-concurrent-playback pipeline
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)

本视频展示了如何同时解码并播放多个 AVC 编码的 MP4 视频，并使用合成来创建动态视频墙显示。

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewbox="0 0 640 400" width="640" height="400" style="cursor:auto !important">
    <defs>
      <style>@import url("https://fonts.googleapis.com/css2?family=Roboto+Flex:opsz,wght@8..144,100..1000&amp;display=swap");
.svg-1 .bg-fill { fill: var(--color-background) }
.svg-1 .fill-text { color: var(--color-content); fill: var(--color-content) }
.svg-1 .video-hoverbox { transition: opacity 0.15s ease-in-out }
.svg-1 .video-hoverbox:hover { opacity: 0.9 }</style>
  </defs>

  <foreignobject x="0" y="0" width="640" height="400">
    <body xmlns="http://www.w3.org/1999/xhtml">
        <iframe width="640" height="400" src="https://players.brightcove.net/1414329538001/4JiZQnWhg_default/index.html?videoId=6380739853112" allowfullscreen="" allow="encrypted-media"></iframe>
    <div class='topic-detail'><div class='topic-updated-date'><span> Last Published: </span>Nov 11, 2025</div><div class='prev-and-next-links'><span class='previous-topic-link'><span aria-hidden='true' class='disabled' data-tip='' data-effect='solid'></span></span></div></div></body>
    </foreignobject>
</svg>

## 前提条件

- 在 Permissive 模式下启用 SSH 以安全访问主机设备。相关说明，可参见 [SSH 使用指南](https://docs.qualcomm.com/bundle/publicresource/topics/80-70014-254/how_to.html#how-to-ssh-)
- 使用以下命令进入 SSH shell 并执行用例：

        ssh root@<ip-addr of the target device>Copy to clipboard
- 运行以下命令以启用 Permissive 模式：

        setenforce 0Copy to clipboard
- 运行以下命令，开启显示屏：

        export XDG_RUNTIME_DIR=/dev/socket/weston && export WAYLAND_DISPLAY=wayland-1Copy to clipboard
- 运行以下命令，从主机推送文件：

        scp <filename> root@<IP address of target device>:/opt/Copy to clipboard

## 用例

下表列出了通过 gst-videocodec-concurrent-playback 程序支持的用例：| 用例 | 说明 |
| --- | --- |
| 视频会议 | <ul class="ul" id="gst-concurrent-videoplayback__ul_wrw_5tf_4bc"><br>                                    <li class="li">同时解码多个参与者的视频流。</li><br><br>                                    <li class="li">这在程序管理多个视频流的多方视频会议场景中非常有用。</li><br><br>                                </ul> |
| 监控系统 | 同时解码来自两个独立摄像头的视频源，每个摄像头都采用不同的编码方法。 |

要执行用例，请执行以下操作：

1. 将视频文件加载到设备上。
2. 使用以下语法命令运行用例：

        gst-videocodec-concurrent-playback -i /opt/<h264_file>.mp4 -i /opt/<h265_file>.mp4 -o /opt/<test>.yuvCopy to clipboard

下表提供了命令行参数的说明：    | 命令行参数 | 说明 |
    | --- | --- |
    | `-i` | 指定 H.264 和 H.265 输入视频文件的绝对路径。<br>应首先指定 H.264 输入文件。 |
    | `-o` | 指定 H.265 输出 YUV 文件的绝对路径。 |

    例如，要并发播放多格式视频，请使用以下命令：

        gst-videocodec-concurrent-playback  -i /opt/<h264_file>.mp4 -i /opt/<h265_file>.mp4 -o /opt/<test>.yuvCopy to clipboard

    如需停止用例，请按下 CTRL + C。

Note: 要避免在设备上出现大型 YUV 数据转储，请在短时间内运行此用例。

## 预期输出

- H.264 视频显示到 Wayland 显示器。
- H.265 HEVC 视频将写入 YUV 文件。
    要播放 YUV 文件，请执行以下操作：

    1. 从设备中拉取 YUV 转储文件。
    2. 使用主机上运行的 YUV 播放器播放视频。
        例如，可以选择 `YUV420planarNV12` 格式，并将 `1920 & 1088` 用作步幅和扫描线。

Note: 如果主机上没有可用的默认 YUV 播放器，则可以使用 [https://sourceforge.net/projects/raw-yuvplayer/](https://sourceforge.net/projects/raw-yuvplayer/)。

## Pipeline 流程

下表列出了用于执行多格式编码/解码 pipeline 的插件：| 插件 | 说明 |
| --- | --- |
| filesrc | 读取视频数据。 |
| qtdemux | 对视频数据进行解析。 |
| h264parse | 解析 H.264 视频流。 |
| h265parse | 解析 H.265 视频流。 |
| [v4l2h264dec](https://docs.qualcomm.com/doc/80-70014-50Y/topic/v4l2h264dec.html) | 使用 Video4Linux 解码 H.264 视频流。 |
| [v4l2h265dec](https://docs.qualcomm.com/doc/80-70014-50Y/topic/v4l2h265dec.html) | 使用 Video4Linux 解码 H.265 视频流。 |
| [Waylandsink](https://docs.qualcomm.com/doc/80-70014-50Y/topic/waylandsink.html) | 在 Wayland 显示器上显示 H.264 视频流。 |
| filesink | 将 H.265 视频写入 YUV 文件进行播放。 |

**Parent Topic:** [视频和音频的示例程序](https://docs.qualcomm.com/doc/80-70014-50Y/topic/audio-sample-applications.html)

Last Published: Nov 11, 2025

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