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Duplicate Playlist Entries with BaseURL tags at different levels of the Manifest

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  • ¿Algo no está bien?
#175 0 comentarios 0 reacciones 0 asignados Ver en GitHub

Nadie ha tomado este issue todavía.

  • #191 de @cpruijsen — cerrado sin fusionar

Evaluación

Dificultad
3/5
Tiempo estimado
1-2 días
Aptitud para principiantes
45/100
Tipo de issue
Error
Claridad
Bastante claro
Estado de actividad
Estancado
Stack tecnológico
javascript
Área
audio-video-rtc

Línea de trabajo

Start in src/inheritAttributes.js at the linked inheritAttributes functionality and inspect how representationInfo is built from parent and child BaseURL nodes. Reproduce the manifest example with multiple MPD-level BaseURL elements, then verify that unresolved combinations do not add duplicate child BaseURL entries while preserving distinct URLs.

Escrito por el modelo de indexación a partir del texto del issue.

Descripción

bug

There are occurrences in the inheritAttributes functionality where this representationInfo array contains undesired duplicates. This generally occurs when there are multiple BaseURL nodes that are direct children of the MPD node. When we attempt to resolve URLs from a combination of the parent BaseURL and a child BaseURL, and the value does not resolve, we end up returning the child BaseURL multiple times. We need to determine a way to remove these duplicates in a safe way.

See: https://github.com/videojs/mpd-parser/pull/17#discussion_r162750527

Example Input (Note that there are multiple BaseURLs as direct children of the MPD tag)

<MPD type="dyanmic">
    <BaseURL serviceLocation="alpha">https://cdn1.example.com/</BaseURL>
    <BaseURL serviceLocation="beta">https://cdn2.example.com/</BaseURL>
    <Period start="PT0S">
      ...
      <AdaptationSet mimeType="text/vtt" lang="en">
        <Representation bandwidth="256" id="en">
          <BaseURL>https://example.com/en.vtt</BaseURL>
        </Representation>
      </AdaptationSet>
    </Period>
  </MPD>

Current Actual RepresentationInfo

representationInfo: [
      {
        attributes: {
          baseUrl: 'https://cdn1.example.com/',
          ...
        },
        segmentInfo: {...}
      },
      {
        attributes: {
          baseUrl: 'https://cdn2.example.com/',
          ... 
        },
        segmentInfo: {...}
      },
      {
        attributes: {
          baseUrl: 'https://example.com/en.vtt',
          ... 
        },
        segmentInfo: {...}
      },
      {
        attributes: {
          baseUrl: 'https://example.com/en.vtt',
          ...
        },
        segmentInfo: {...}
      }
    ]

Expected (Notice there is one less entry than the last)

representationInfo: [
      {
        attributes: {
          baseUrl: 'https://cdn1.example.com/',
          ...
        },
        segmentInfo: {...}
      },
      {
        attributes: {
          baseUrl: 'https://cdn2.example.com/',
          ... 
        },
        segmentInfo: {...}
      },
      {
        attributes: {
          baseUrl: 'https://example.com/en.vtt',
          ... 
        },
        segmentInfo: {...}
      }
    ]
Lenguaje dominante
JavaScript
Estrellas
89
Forks
60
Sin PR fusionados en 30 d

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Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
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  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

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