Question

有一个XML文件生成的视频编辑软件，其中包含剪辑预设的所有数据。 XML对软件有效。它唯一缺少的是fielddominance的元素（我需要在那里设置'upper'值）文件结构对我来说很难。这就像这样：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xmeml>
<xmeml version="5">
<sequence>
<name>to_color (Resolve)</name>
<duration>121597</duration>
<rate>
    <!-- ... -->
</rate>
<in>-1</in>
<out>-1</out>
<timecode>
    <!-- ... -->
</timecode>
<media>
    <video>
        <track>
            <clipitem id="983_0121_01_1_5FF70094C4A64669BC77.mov 0">
                <name>983_0121_01_1_5FF70094C4A64669BC77.mov</name>
                <duration>271</duration>
                <rate>
                    <timebase>25</timebase>
                    <ntsc>false</ntsc>
                </rate>
                <start>0</start>
                <end>221</end>
                <enabled>true</enabled>
                <in>25</in>
                <out>246</out>
                <file id="983_0121_01_1_5FF70094C4A64669BC77.mov 2">
                    <duration>271</duration>
                    <rate>
                        <!-- ... -->
                    </rate>
                    <name>983_0121_01_1_5FF70094C4A64669BC77.mov</name>
                    <pathurl>file://Capture2/Capture2/SHARED/DAVINCI_Render/111.mxf</pathurl>
                    <timecode>
                        <!-- ... -->
                    </timecode>
                    <media>
                        <video>
                            <duration>271</duration>
                            <samplecharacteristics>
                                <width>1920</width>
                                <height>1080</height>
                            </samplecharacteristics>
                        </video>
                    </media>
                </file>
                <compositemode>normal</compositemode>
                <filter>
                    <enabled>true</enabled>
                    <start>0</start>
                    <end>271</end>
                    <effect>
                        <name>Opacity</name>
                        <effectid>opacity</effectid>
                        <effecttype>motion</effecttype>
                        <mediatype>video</mediatype>
                        <effectcategory>motion</effectcategory>
                        <parameter>
                            <name>opacity</name>
                            <parameterid>opacity</parameterid>
                            <value>100</value>
                            <valuemin>0</valuemin>
                            <valuemax>100</valuemax>
                        </parameter>
                    </effect>
                </filter>
            </clipitem>
        </track>
        <format>
            <samplecharacteristics>
                <!-- this is what I need to add START -->
                <fielddominance>upper</fielddominance> 
                <!-- this is what I need to add END-->
                <width>1920</width>
                <height>1080</height>
                <pixelaspectratio>square</pixelaspectratio>
                <rate>
                    <!-- ... -->
                </rate>
                <codec>
                    <!-- ... -->
                </codec>
            </samplecharacteristics>
        </format>
    </video>
    <audio>
        <track>
            <!-- ... -->
        </track>
    </audio>
</media>
</sequence>
</xmeml>

我需要添加的元素位于sequence - media - video - format - samplecharacteristics字段中。但是此标记也存在于sequence - media - video - track - clipitem - file - media - video - samplecharacteristics

中

我使用xml.etree.ElementTree作为解析器。这是我正在尝试的，当然我做错了：

import xml.etree.ElementTree as ET
tree = ET.parse(r'\\capture2\11\in.xml')
root = tree.getroot()
fieldd = ET.Element('fielddominance')
fieldd.set('field','upper')
for tag in root.iter('samplecharacteristics'):
    tag.append(fieldd)
output_file  = r'\\capture2\11\new.xml'
with open(output_file, 'wb') as out:
    tree.write(out, encoding='utf-8')

这为每个样本特征标记添加了fielddominance。我不知道如何在标签内设置'upper'值，而不是属性。

我希望仅将<fielddominance>upper</fielddominance>写入format代码，但省略<track>代码

Answer 1

您可以使用ElementTree的limited XPath support来隔离您要修改的samplecharacteristics。此外，设置元素的文本只需setting its .text attribute。

试试这个：

import xml.etree.ElementTree as ET

tree = ET.parse('in.xml')
fieldd = ET.Element('fielddominance')
fieldd.text = 'upper'
for tag in tree.findall("./sequence/media/video/format/samplecharacteristics"):
    tag.append(fieldd)
tree.write('new.xml', "UTF-8", True)

尝试使用xml.etree.ElementTree

1 个答案: