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standardize m4b encoding to VBR -q:a 2; replace remaining ffmpeg blocks in desktop GUI with domain modules

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This commit is contained in:
Artem Akymenko
2026-07-15 13:28:21 +00:00
parent ae9ab70421
commit 50d75eb2fc
3 changed files with 58 additions and 117 deletions
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abogen/domain/audio_helpers.py
+1 -1
View File
@@ -35,7 +35,7 @@ def build_ffmpeg_command(path: Path, fmt: str, metadata: Optional[Dict[str, str]
elif fmt == "opus":
base += ["-c:a", "libopus", "-b:a", "24000"]
elif fmt == "m4b":
base += ["-c:a", "aac", "-b:a", "192k", "-movflags", "+faststart+use_metadata_tags"]
base += ["-c:a", "aac", "-q:a", "2", "-movflags", "+faststart+use_metadata_tags"]
else:
base += ["-c:a", "copy"]
abogen/pyqt/conversion.py
+56 -116
View File
@@ -23,6 +23,12 @@ from abogen.constants import (
from abogen.voice_formulas import get_new_voice
from abogen.infrastructure.subtitle_writer import _format_timestamp
from abogen.domain.split_pattern import get_split_pattern
from abogen.domain.output_paths import (
resolve_output_directory,
build_output_path,
sanitize_output_stem,
)
from abogen.domain.audio_helpers import build_ffmpeg_command, to_float32
import abogen.hf_tracker as hf_tracker
import static_ffmpeg
import threading # for efficient waiting
@@ -639,15 +645,17 @@ class ConversionThread(QThread):
base_path = self.display_path if self.display_path else self.file_name
base_name = os.path.splitext(os.path.basename(base_path))[0]
# Sanitize base_name for folder/file creation based on OS
sanitized_base_name = sanitize_name_for_os(base_name, is_folder=True)
if self.save_option == "Save to Desktop":
parent_dir = user_desktop_dir()
elif self.save_option == "Save next to input file":
parent_dir = os.path.dirname(base_path)
else:
parent_dir = self.output_folder or os.getcwd()
parent_dir = resolve_output_directory(
save_mode=self.save_option,
stored_path=Path(base_path),
output_folder=getattr(self, "output_folder", None),
desktop_dir=Path(user_desktop_dir()),
user_output_path=None,
user_cache_outputs=Path(os.getcwd()),
)
parent_dir = str(parent_dir)
# Ensure the output folder exists, error if it doesn't
if not os.path.exists(parent_dir):
self.log_updated.emit(
@@ -717,77 +725,40 @@ class ConversionThread(QThread):
format=self.output_format,
)
ffmpeg_proc = None
elif self.output_format == "m4b":
# Real-time M4B generation using FFmpeg pipe
elif self.output_format in ("m4b", "opus"):
# Real-time generation using FFmpeg pipe
static_ffmpeg.add_paths()
merged_out_file = None
ffmpeg_proc = None
metadata_options, cover_path = (
self._extract_and_add_metadata_tags_to_ffmpeg_cmd()
if self.output_format == "m4b"
else ([], None)
)
# Prepare ffmpeg command for m4b output
cmd = [
"ffmpeg",
"-y",
"-thread_queue_size",
"32768",
"-f",
"f32le",
"-ar",
"24000",
"-ac",
"1",
"-i",
"pipe:0",
]
if cover_path and os.path.exists(cover_path):
cmd.extend(
[
"-i",
cover_path,
"-map",
"0:a",
"-map",
"1",
"-c:v",
"copy",
"-disposition:v",
"attached_pic",
]
cmd = build_ffmpeg_command(
Path(merged_out_path),
self.output_format,
)
cmd.extend(
[
"-c:a",
"aac",
"-q:a",
"2",
"-movflags",
"+faststart+use_metadata_tags",
]
)
cmd += metadata_options
cmd.append(merged_out_path)
# Insert thread queue size after ffmpeg header
cmd.insert(2, "-thread_queue_size")
cmd.insert(3, "32768")
if self.output_format == "m4b" and cover_path and os.path.exists(cover_path):
# Insert cover image input before the output path
output_path = cmd.pop()
cmd.extend([
"-i", cover_path,
"-map", "0:a",
"-map", "1",
"-c:v", "copy",
"-disposition:v", "attached_pic",
])
cmd.extend(metadata_options)
cmd.append(output_path)
elif self.output_format == "m4b":
output_path = cmd.pop()
cmd.extend(metadata_options)
cmd.append(output_path)
ffmpeg_proc = create_process(cmd, stdin=subprocess.PIPE, text=False)
elif self.output_format == "opus":
static_ffmpeg.add_paths()
cmd = [
"ffmpeg",
"-y",
"-thread_queue_size",
"32768",
"-f",
"f32le",
"-ar",
"24000",
"-ac",
"1",
"-i",
"pipe:0",
]
cmd.extend(["-c:a", "libopus", "-b:a", "24000"])
cmd.append(merged_out_path)
ffmpeg_proc = create_process(cmd, stdin=subprocess.PIPE, text=False)
merged_out_file = None
else:
self.log_updated.emit(
(f"Unsupported output format: {self.output_format}", "red")
@@ -1560,58 +1531,27 @@ class ConversionThread(QThread):
)
else:
static_ffmpeg.add_paths()
cmd = [
"ffmpeg",
"-y",
"-thread_queue_size",
"32768",
"-f",
"f32le",
"-ar",
str(rate),
"-ac",
"1",
"-i",
"pipe:0",
]
cmd = build_ffmpeg_command(
Path(merged_out_path),
self.output_format,
)
cmd.insert(2, "-thread_queue_size")
cmd.insert(3, "32768")
if self.output_format == "m4b":
metadata_options, cover_path = (
self._extract_and_add_metadata_tags_to_ffmpeg_cmd()
)
if cover_path and os.path.exists(cover_path):
cmd.extend(
[
"-i",
cover_path,
"-map",
"0:a",
"-map",
"1",
"-c:v",
"copy",
"-disposition:v",
"attached_pic",
]
)
cmd.extend(
[
"-c:a",
"aac",
"-q:a",
"2",
"-movflags",
"+faststart+use_metadata_tags",
]
)
output_path = cmd.pop()
cmd.extend([
"-i", cover_path,
"-map", "0:a",
"-map", "1",
"-c:v", "copy",
"-disposition:v", "attached_pic",
])
cmd.append(output_path)
cmd.extend(metadata_options)
elif self.output_format == "opus":
cmd.extend(["-c:a", "libopus", "-b:a", "24000"])
else:
self.log_updated.emit(
(f"Unsupported output format: {self.output_format}", "red")
)
return
cmd.append(merged_out_path)
ffmpeg_proc = create_process(cmd, stdin=subprocess.PIPE, text=False)
# Always generate subtitles for subtitle input files
tests/test_audio_helpers.py
+1
View File
@@ -46,6 +46,7 @@ class TestBuildFfmpegCommand:
cmd = build_ffmpeg_command(Path("/out.m4b"), "m4b")
assert "aac" in cmd
assert "-q:a" in cmd
assert "+faststart+use_metadata_tags" in cmd
def test_wav_copy_codec(self):