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keep most tags during audio transcode

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metadata is no longer discarded when transcoding to opus or mp3;
this was a good idea back when the transcodes were only used by
the webplayer, but now that folders can be batch-downloaded with
on-the-fly transcoding, it makes sense to keep most of the tags

individual tags are discarded if its value exceeds 1023 letters

this should mainly affect the following:
* traktor beatmaps, size usually somewhere around 100 KiB
* non-standard cover-art embeddings, size around 250 KiB
* XMP (project data from adobe premiere), around 48 KiB
This commit is contained in:
ed 2024-05-30 23:46:56 +00:00
parent b629d18df6
commit 07ea629ca5
1 changed files with 18 additions and 8 deletions
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26
copyparty/th_srv.py
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@ -673,8 +673,8 @@ class ThumbSrv(object):
raise Exception("disabled in server config")
self.wait4ram(0.2, tpath)
ret, _ = ffprobe(abspath, int(vn.flags["convt"] / 2))
if "ac" not in ret:
tags, rawtags = ffprobe(abspath, int(vn.flags["convt"] / 2))
if "ac" not in tags:
raise Exception("not audio")
if quality.endswith("k"):
@ -695,7 +695,7 @@ class ThumbSrv(object):
b"-v", b"error",
b"-hide_banner",
b"-i", fsenc(abspath),
b"-map_metadata", b"-1",
] + self.big_tags(rawtags) + [
b"-map", b"0:a:0",
b"-ar", b"44100",
b"-ac", b"2",
@ -711,16 +711,16 @@ class ThumbSrv(object):
raise Exception("disabled in server config")
self.wait4ram(0.2, tpath)
ret, _ = ffprobe(abspath, int(vn.flags["convt"] / 2))
if "ac" not in ret:
tags, rawtags = ffprobe(abspath, int(vn.flags["convt"] / 2))
if "ac" not in tags:
raise Exception("not audio")
try:
dur = ret[".dur"][1]
dur = tags[".dur"][1]
except:
dur = 0
src_opus = abspath.lower().endswith(".opus") or ret["ac"][1] == "opus"
src_opus = abspath.lower().endswith(".opus") or tags["ac"][1] == "opus"
want_caf = tpath.endswith(".caf")
tmp_opus = tpath
if want_caf:
@ -741,7 +741,7 @@ class ThumbSrv(object):
b"-v", b"error",
b"-hide_banner",
b"-i", fsenc(abspath),
b"-map_metadata", b"-1",
] + self.big_tags(rawtags) + [
b"-map", b"0:a:0",
b"-c:a", b"libopus",
b"-b:a", bq,
@ -798,6 +798,16 @@ class ThumbSrv(object):
except:
pass
def big_tags(self, raw_tags: dict[str, list[str]]) -> list[bytes]:
ret = []
for k, vs in raw_tags.items():
for v in vs:
if len(str(v)) >= 1024:
bv = (k + "=").encode("utf-8", "replace")
ret += [b"-metadata", bv]
break
return ret
def poke(self, tdir: str) -> None:
if not self.poke_cd.poke(tdir):
return