File _service of Package ffmpeg

<services>
  <!-- Arch package sources -->
  <service name="download_files" />
  <!-- FFMpeg sources -->
  <service name="obs_scm">
    <param name="scm">git</param>
    <param name="url">https://git.ffmpeg.org/ffmpeg.git</param>
    <param name="revision">n7.1.1</param>
    <param name="versionformat">@PARENT_TAG@</param>
    <param name="versionrewrite-pattern">n(.*)</param>
    <param name="filename">ffmpeg</param>
  </service>
  <service name="tar"         mode="buildtime" />
  <service name="set_version" mode="buildtime" />
</services>