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Don't trust AVFormatContext duration in Webm video.

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It reports some strange numbers like 1000, which is 1ms.
This commit is contained in:
John Preston 2022-01-20 17:17:12 +03:00
parent 219ffd2c48
commit 2e39befd7c
1 changed files with 14 additions and 0 deletions
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14
Telegram/SourceFiles/media/streaming/media_streaming_file.cpp
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@ -18,6 +18,18 @@ namespace {
constexpr auto kMaxSingleReadAmount = 8 * 1024 * 1024; constexpr auto kMaxSingleReadAmount = 8 * 1024 * 1024;
constexpr auto kMaxQueuedPackets = 1024; constexpr auto kMaxQueuedPackets = 1024;
[[nodiscard]] bool UnreliableFormatDuration(
not_null<AVFormatContext*> format,
not_null<AVStream*> stream) {
return stream->codec
&& (stream->codec->codec_id == AV_CODEC_ID_VP9)
&& format->iformat
&& format->iformat->name
&& QString::fromLatin1(
format->iformat->name
).split(QChar(',')).contains(u"webm");
}
} // namespace } // namespace
File::Context::Context( File::Context::Context(
@ -174,6 +186,8 @@ Stream File::Context::initStream(
result.timeBase = info->time_base; result.timeBase = info->time_base;
result.duration = (info->duration != AV_NOPTS_VALUE) result.duration = (info->duration != AV_NOPTS_VALUE)
? FFmpeg::PtsToTime(info->duration, result.timeBase) ? FFmpeg::PtsToTime(info->duration, result.timeBase)
: UnreliableFormatDuration(format, info)
? kTimeUnknown
: FFmpeg::PtsToTime(format->duration, FFmpeg::kUniversalTimeBase); : FFmpeg::PtsToTime(format->duration, FFmpeg::kUniversalTimeBase);
if (result.duration == kTimeUnknown) { if (result.duration == kTimeUnknown) {
result.duration = kDurationUnavailable; result.duration = kDurationUnavailable;