Fix typing errors in ffprobe and ffmpeg related functions.

src/tscut/tools/ffmpeg.py

@@ -24,7 +24,7 @@ from tqdm import tqdm
 from tscut.tools.ffprobe import (
     get_video_dimensions,
     with_subtitles,
-    get_frames_in_stream
+    get_frames_in_stream,
 )
 from tscut.tools.ppm import dump_ppm
 from tscut.tools.timeframe import parse_timestamp, get_packet_duration
@@ -36,6 +36,9 @@ logger = logging.getLogger(__name__)
 def ffmpeg_convert(ffmpeg_path:str, ffprobe_path:str, input_file: IO[bytes], input_format:str,
                    output_file: IO[bytes], output_format:str, duration: timedelta):
     width, height =  get_video_dimensions(ffprobe_path, input_file)
+    if width is None or height is None:
+        return
+
     subtitles = with_subtitles(ffprobe_path, input_file)
 
     infd = input_file.fileno()
@@ -67,8 +70,8 @@ def ffmpeg_convert(ffmpeg_path:str, ffprobe_path:str, input_file: IO[bytes], inp
                   total=int(duration/timedelta(seconds=1)), unit='s', desc='Conversion')
         for line in pb:
             if line.startswith('out_time='):
-                ts = line.split('=')[1].strip()
-                ts = parse_timestamp(ts)
+                ts_str = line.split('=')[1].strip()
+                ts = parse_timestamp(ts_str)
                 if ts is not None:
                     pb.n = int(ts/timedelta(seconds=1))
                     pb.update()
@@ -199,8 +202,8 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
                 color_space =stream['color_space']
                 color_transfer = stream['color_transfer']
                 color_primaries = stream['color_primaries']
-                level = int(stream['level'])
-                level = f'{floor(level/10):d}.{level%10:d}'
+                level_int = int(stream['level'])
+                level = f'{floor(level_int/10):d}.{level_int%10:d}'
                 chroma_location = stream['chroma_location']
                 field_order = stream
                 match field_order:
@@ -233,7 +236,7 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
                 images_bytes, memfd = extract_pictures(ffmpeg_path, input_file=input_file,
                                                        begin=begin, nb_frames=nb_frames,
                                                        width=width, height=height)
-                if images_bytes is None:
+                if images_bytes is None or memfd is None:
                     logger.error('Impossible to extract picture from video stream.')
                     exit(-1)
 
@@ -270,6 +273,9 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
                                                      f"language={stream['tags']['language']}"])
                 packets = get_frames_in_stream(ffprobe_path, input_file=input_file, begin=begin,
                                                end=end, stream_kind='a', sub_stream_id=audio_id)
+                if packets is None:
+                    logger.error("Impossible to retrieve audio packets")
+                    return None
                 nb_packets = len(packets)
                 logger.debug("Found %d packets to be extracted from audio track.", nb_packets)
                 if nb_packets > 0:
@@ -288,7 +294,7 @@ def extract_all_streams(ffmpeg_path:str, ffprobe_path:str, input_file:IO[bytes],
                                                    output_filename=tmpname,
                                                    sample_rate=sample_rate, nb_channels=nb_channels)
 
-                if sound_bytes is None:
+                if sound_bytes is None or memfd is None:
                     logger.error('Impossible to extract sound track')
                     exit(-1)
 

src/tscut/tools/ffprobe.py

@@ -173,7 +173,8 @@ def get_movie_duration(ffprobe_path:str, input_file: IO[bytes]) -> timedelta|Non
 
 # ffprobe -loglevel quiet -select_streams v:0 -show_entries stream=width,height -of json sample.ts
 @typechecked
-def get_video_dimensions(ffprobe_path:str, input_file: IO[bytes]) -> tuple[int,int]|None:
+def get_video_dimensions(ffprobe_path:str,
+                         input_file: IO[bytes]) -> tuple[int,int]| tuple[None,None]:
     infd = input_file.fileno()
     lseek(infd, 0, SEEK_SET)
     set_inheritable(infd, True)
@@ -188,7 +189,7 @@ def get_video_dimensions(ffprobe_path:str, input_file: IO[bytes]) -> tuple[int,i
                 return int(video['width']), int(video['height'])
 
     logger.error('Impossible to retrieve dimensions of video')
-    return None
+    return None, None
 
 @typechecked
 def get_streams(ffprobe_path:str, input_file: IO[bytes]) -> list|None: