diff options
| author | Carl Hetherington <cth@carlh.net> | 2024-05-13 01:20:27 +0200 |
|---|---|---|
| committer | Carl Hetherington <cth@carlh.net> | 2024-05-13 23:03:04 +0200 |
| commit | e2ea739fcaa8077975a8559f267a1b1377b7e100 (patch) | |
| tree | 19a6fa66ea10194d3e1fd64442c5f035810f0dea /src/lib/ffmpeg_decoder.cc | |
| parent | 63fd3d143387bc0dbbbe228955421a59239dbe5c (diff) | |
Don't bother decoding audio if none of it is mapped (#2809).
On a test adding subs from an MKV to an existing DCP this reduces
the processing time from ~2h to ~1m because it doesn't resample the
audio from the whole of the MKV, only to discard it.
Diffstat (limited to 'src/lib/ffmpeg_decoder.cc')
| -rw-r--r-- | src/lib/ffmpeg_decoder.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/lib/ffmpeg_decoder.cc b/src/lib/ffmpeg_decoder.cc index 6130d8e5f..e0d9918b2 100644 --- a/src/lib/ffmpeg_decoder.cc +++ b/src/lib/ffmpeg_decoder.cc @@ -89,7 +89,7 @@ FFmpegDecoder::FFmpegDecoder (shared_ptr<const Film> film, shared_ptr<const FFmp _pts_offset = {}; } - if (c->audio) { + if (c->audio && !c->audio->mapping().mapped_output_channels().empty()) { audio = make_shared<AudioDecoder>(this, c->audio, fast); } @@ -240,7 +240,7 @@ FFmpegDecoder::pass () decode_and_process_video_packet (packet); } else if (fc->subtitle_stream() && fc->subtitle_stream()->uses_index(_format_context, si) && !only_text()->ignore()) { decode_and_process_subtitle_packet (packet); - } else { + } else if (audio) { decode_and_process_audio_packet (packet); } |