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feat(encoder): copy input streams' metadata to output streams (#1284)

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* feat(encoder): copy language tag for audio and subtitle streams

Containers with audio streams for different languages use a tag
to signal which track contains which language. This information is
saved in the metadata object of a stream and needs to be copied
in addition to the codec properties.

* feat(encoder): copy input streams' metadata to output streams

---------

Signed-off-by: k4yt3x <i@k4yt3x.com>
Co-authored-by: k4yt3x <i@k4yt3x.com>
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Henje 2025-01-08 21:39:43 +01:00 committed by GitHub
parent b1190d7591
commit 8ffe1b84bd
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2 changed files with 9 additions and 1 deletions
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1
CHANGELOG.md
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@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Added ### Added
- Multi-versioning to critical functions to enhance performance in generic architecture builds. - Multi-versioning to critical functions to enhance performance in generic architecture builds.
- The feature to copy input streams' metadata to the output streams (#1282).
### Changed ### Changed

9
src/encoder.cpp
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@ -225,7 +225,7 @@ int Encoder::init(
return AVERROR_UNKNOWN; return AVERROR_UNKNOWN;
} }
// Copy codec parameters from input to output // Copy codec parameters from the input stream to the output stream
ret = avcodec_parameters_copy(out_stream->codecpar, in_codecpar); ret = avcodec_parameters_copy(out_stream->codecpar, in_codecpar);
if (ret < 0) { if (ret < 0) {
logger()->error("Failed to copy codec parameters"); logger()->error("Failed to copy codec parameters");
@ -233,6 +233,13 @@ int Encoder::init(
} }
out_stream->codecpar->codec_tag = 0; out_stream->codecpar->codec_tag = 0;
// Copy all metadata from the input stream to the output stream
AVDictionaryEntry* tag = nullptr;
while ((tag = av_dict_get(in_stream->metadata, "", tag, AV_DICT_IGNORE_SUFFIX)) !=
nullptr) {
av_dict_set(&out_stream->metadata, tag->key, tag->value, 0);
}
// Copy time base // Copy time base
out_stream->time_base = in_stream->time_base; out_stream->time_base = in_stream->time_base;