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In t35_tool json manifest, use composition order frame indices. #73

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Merged
maryla-uc merged 1 commit into from
Apr 1, 2026
Merged

In t35_tool json manifest, use composition order frame indices. #73

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25 changes: 23 additions & 2 deletions IsoLib/t35_tool/injection/StrategyHelpers.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -70,7 +70,13 @@ MP4Err getVideoSampleDurations(MP4Media mediaV, std::vector<u32> &durations)
err = MP4GetMediaSampleCount(mediaV, &sampleCount);
if(err) return err;

durations.reserve(sampleCount);
struct SampleInfo
{
u64 cts;
u32 duration;
};
std::vector<SampleInfo> samples;
samples.reserve(sampleCount);

for(u32 i = 1; i <= sampleCount; ++i)
{
Expand All @@ -88,11 +94,26 @@ MP4Err getVideoSampleDurations(MP4Media mediaV, std::vector<u32> &durations)
return err;
}

durations.push_back(static_cast<u32>(outDuration));
u64 cts = outDTS;
if(outSampleFlags & MP4MediaSampleHasCTSOffset)
{
cts = static_cast<u64>(static_cast<s64>(outDTS) + outCTSOffset);
}
samples.push_back({cts, static_cast<u32>(outDuration)});

if(sampleH) MP4DisposeHandle(sampleH);
}

// Sort by CTS
std::sort(samples.begin(), samples.end(),
[](const SampleInfo &a, const SampleInfo &b) { return a.cts < b.cts; });

durations.reserve(sampleCount);
for(const auto &s : samples)
{
durations.push_back(s.duration);
}

LOG_DEBUG("Collected {} video sample durations", durations.size());
return MP4NoErr;
}
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