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slidge-whatsapp
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Bump voice message bit-rate to 64k 

This helps improve quality, and appears to be well-supported by official
WhatsApp clients. In addition, a bug concerning the handling of ALAC
files has been fixed (which would previously not send through correctly,
owing to WhatsApp's lack of handling for these).
This commit is contained in:
Alex Palaistras 2024-02-16 22:11:59 +00:00
parent 7b87bfe29a
commit c40c9747e4
1 changed files with 7 additions and 8 deletions
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15
slidge_whatsapp/attachment.go
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@ -68,7 +68,7 @@ var (
"-f", "ogg", "-c:a", "libopus", // Convert to Ogg with Opus.
"-ac", "1", // Convert to mono.
"-ar", "48000", // Use specific sample-rate of 48000hz.
"-b:a", "16k", // Use relatively small bit-rate of 16kBit/s.
"-b:a", "64k", // Use relatively reasonable bit-rate of 64kBit/s.
"-map_metadata", "-1", // Remove all metadata from output.
},
}
@ -122,13 +122,12 @@ func convertAttachment(attach *Attachment) error {
}
}
// MP4 audio files are matched as `audio/m4a` which is not a valid MIME, correct this to
// `audio/mp4`, which is what WhatsApp requires as well.
if detectedMIME == "audio/m4a" {
detectedMIME = "audio/mp4"
}
switch detectedMIME {
case "audio/m4a":
// MP4 audio files are matched as `audio/m4a` which is not a valid MIME, correct this to
// `audio/mp4`, which is what WhatsApp requires as well.
detectedMIME = "audio/mp4"
fallthrough
case "audio/mp4", "audio/ogg":
if err := populateAttachmentMetadata(attach); err == nil {
switch attach.meta.codec {
@ -136,7 +135,7 @@ func convertAttachment(attach *Attachment) error {
// wants to retain these characteristics. Since WhatsApp will try (and likely fail)
// to process this as an audio message anyways, set a unique MIME type.
case "alac":
detectedMIME += "; codecs=" + attach.meta.codec
attach.MIME = "application/octet-stream"
return nil
case "opus":
detectedMIME += "; codecs=" + attach.meta.codec