Question

这适用于合并音频和视频

 ffmpeg -i video.mp4 -i audio.ogg -filter_complex "[0:a][1:a]amerge=inputs=2[a]" -map 0:v -map "[a]" -c:v copy -c:a libvorbis -ac 2 -shortest out.mp4 -y -nostdin

我无法弄清楚如何延迟音频，因此它会在视频中启动x秒。我试过-itsoffset，但它不起作用。

Answer 1

使用

...
using System.Web.SessionState;
using System.Reflection;

protected void ReGenerateSessionId()
    {
        SessionIDManager manager = new SessionIDManager();
        string oldId = manager.GetSessionID(Context);
        string newId = manager.CreateSessionID(Context);
        bool isAdd = false, isRedir = false;
        manager.RemoveSessionID(Context);
        manager.SaveSessionID(Context, newId, out isRedir, out isAdd);

        HttpApplication ctx = (HttpApplication)HttpContext.Current.ApplicationInstance;
        HttpModuleCollection mods = ctx.Modules;
        System.Web.SessionState.SessionStateModule ssm = (SessionStateModule)mods.Get("Session");
        System.Reflection.FieldInfo[] fields = ssm.GetType().GetFields(BindingFlags.NonPublic | BindingFlags.Instance);
        SessionStateStoreProviderBase store = null;
        System.Reflection.FieldInfo rqIdField = null, rqLockIdField = null, rqStateNotFoundField = null;

        SessionStateStoreData rqItem = null;
        foreach (System.Reflection.FieldInfo field in fields)
        {
            if (field.Name.Equals("_store")) store = (SessionStateStoreProviderBase)field.GetValue(ssm);
            if (field.Name.Equals("_rqId")) rqIdField = field;
            if (field.Name.Equals("_rqLockId")) rqLockIdField = field;
            if (field.Name.Equals("_rqSessionStateNotFound")) rqStateNotFoundField = field;

            if ((field.Name.Equals("_rqItem")))
            {
                rqItem = (SessionStateStoreData)field.GetValue(ssm);
            }
        }
        object lockId = rqLockIdField.GetValue(ssm);

        if ((lockId != null) && (oldId != null))
        {
            store.RemoveItem(Context, oldId, lockId, rqItem);
        }

        rqStateNotFoundField.SetValue(ssm, true);
        rqIdField.SetValue(ssm, newId);
    }

protected void Login_Click(object sender, EventArgs e)
{
    if (/*Login success*/)
    {
        ReGenerateSessionId(); // Change SessionID
        Session["User"] = user;
        Response.Redirect("Login_Success.aspx", true);
    }
}

ffmpeg -i video.mp4 -i audio.ogg -filter_complex "[1:a]adelay=1000|1000[a1];[0:a][a1]amerge=inputs=2[a]" -map 0:v -map "[a]" -c:v copy -c:a libvorbis -ac 2 -shortest out.mp4 -y -nostdin为OGG的两个频道增加了1000毫秒的静音。

Answer 2

这是一种解决方法，但你可以先用你的ogg连接1秒钟的静音：

https://trac.ffmpeg.org/wiki/Concatenate

合并视频和音频，同时将音频延迟x秒

2 个答案: