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Only enforce the check for video and audio streams #735

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Only enforce the check for video and audio streams #735

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13 changes: 9 additions & 4 deletions src/torchcodec/_core/SingleStreamDecoder.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -203,11 +203,16 @@ void SingleStreamDecoder::scanFileAndUpdateMetadataAndIndex() {
return;
}

// Instead of iterating over all streams unconditionally:
for (unsigned int i = 0; i < formatContext_->nb_streams; ++i) {
// We want to scan and update the metadata of all streams.
TORCH_CHECK(
formatContext_->streams[i]->discard != AVDISCARD_ALL,
"Did you add a stream before you called for a scan?");
AVStream* stream = formatContext_->streams[i];
auto codecType = stream->codecpar->codec_type;
// Only enforce the check for video and audio streams.
if (codecType == AVMEDIA_TYPE_VIDEO || codecType == AVMEDIA_TYPE_AUDIO) {
TORCH_CHECK(
stream->discard != AVDISCARD_ALL,
"Did you add a stream before you called for a scan?");
}
}

AutoAVPacket autoAVPacket;
Expand Down