Separate the options --ignore-errors and --no-abort-on-error

In youtube-dl, `-i` ignores both download and post-processing error, and
treats the download as successful even if the post-processor fails.

yt-dlp used to skip the entire video on either error and there was no
option to ignore the post-processing errors like youtube-dl does.

By splitting the option into two, now either just the download errors
(--no-abort-on-error, default on CLI) or all errors (--ignore-errors)
can be ignored as per the users' needs

Closes #893

README.md

@@ -243,9 +243,12 @@ Then simply run `make`. You can also run `make yt-dlp` instead to compile only t
     -U, --update                     Update this program to latest version. Make
                                      sure that you have sufficient permissions
                                      (run with sudo if needed)
-    -i, --ignore-errors              Continue on download errors, for example to
-                                     skip unavailable videos in a playlist
-                                     (default) (Alias: --no-abort-on-error)
+    -i, --ignore-errors              Ignore download and postprocessing errors.
+                                     The download will be considered successfull
+                                     even if the postprocessing fails
+    --no-abort-on-error              Continue with next video on download
+                                     errors; e.g. to skip unavailable videos in
+                                     a playlist (default)
     --abort-on-error                 Abort downloading of further videos if an
                                      error occurs (Alias: --no-ignore-errors)
     --dump-user-agent                Display the current user-agent and exit

yt_dlp/YoutubeDL.py

@@ -226,9 +226,9 @@ class YoutubeDL(object):
     restrictfilenames: Do not allow "&" and spaces in file names
     trim_file_name:    Limit length of filename (extension excluded)
     windowsfilenames:  Force the filenames to be windows compatible
-    ignoreerrors:      Do not stop on download errors
-                       (Default True when running yt-dlp,
-                       but False when directly accessing YoutubeDL class)
+    ignoreerrors:      Do not stop on download/postprocessing errors.
+                       Can be 'only_download' to ignore only download errors.
+                       Default is 'only_download' for CLI, but False for API
     skip_playlist_after_errors: Number of allowed failures until the rest of
                        the playlist is skipped
     force_generic_extractor: Force downloader to use the generic extractor
@@ -776,7 +776,7 @@ class YoutubeDL(object):
                     tb = ''.join(tb_data)
             if tb:
                 self.to_stderr(tb)
-        if not self.params.get('ignoreerrors', False):
+        if not self.params.get('ignoreerrors'):
             if sys.exc_info()[0] and hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
                 exc_info = sys.exc_info()[1].exc_info
             else:
@@ -1241,7 +1241,7 @@ class YoutubeDL(object):
             except (MaxDownloadsReached, ExistingVideoReached, RejectedVideoReached, LazyList.IndexError):
                 raise
             except Exception as e:
-                if self.params.get('ignoreerrors', False):
+                if self.params.get('ignoreerrors'):
                     self.report_error(error_to_compat_str(e), tb=encode_compat_str(traceback.format_exc()))
                 else:
                     raise
@@ -2989,10 +2989,17 @@ class YoutubeDL(object):
         files_to_delete = []
         if '__files_to_move' not in infodict:
             infodict['__files_to_move'] = {}
+        try:
             files_to_delete, infodict = pp.run(infodict)
+        except PostProcessingError as e:
+            # Must be True and not 'only_download'
+            if self.params.get('ignoreerrors') is True:
+                self.report_error(e)
+                return infodict
+            raise
+
         if not files_to_delete:
             return infodict
-
         if self.params.get('keepvideo', False):
             for f in files_to_delete:
                 infodict['__files_to_move'].setdefault(f, '')

yt_dlp/__init__.py

@@ -279,7 +279,7 @@ def _real_main(argv=None):
             setattr(opts, opt_name, default)
         return None
 
-    set_default_compat('abort-on-error', 'ignoreerrors')
+    set_default_compat('abort-on-error', 'ignoreerrors', 'only_download')
     set_default_compat('no-playlist-metafiles', 'allow_playlist_files')
     set_default_compat('no-clean-infojson', 'clean_infojson')
     if 'format-sort' in compat_opts:

yt_dlp/options.py

@@ -206,9 +206,13 @@ def parseOpts(overrideArguments=None):
         action='store_true', dest='update_self',
         help='Update this program to latest version. Make sure that you have sufficient permissions (run with sudo if needed)')
     general.add_option(
-        '-i', '--ignore-errors', '--no-abort-on-error',
-        action='store_true', dest='ignoreerrors', default=None,
-        help='Continue on download errors, for example to skip unavailable videos in a playlist (default) (Alias: --no-abort-on-error)')
+        '-i', '--ignore-errors',
+        action='store_true', dest='ignoreerrors',
+        help='Ignore download and postprocessing errors. The download will be considered successfull even if the postprocessing fails')
+    general.add_option(
+        '--no-abort-on-error',
+        action='store_const', dest='ignoreerrors', const='only_download',
+        help='Continue with next video on download errors; e.g. to skip unavailable videos in a playlist (default)')
     general.add_option(
         '--abort-on-error', '--no-ignore-errors',
         action='store_false', dest='ignoreerrors',

yt_dlp/postprocessor/common.py

@@ -52,6 +52,7 @@ class PostProcessor(object):
             return self._downloader.report_warning(text, *args, **kwargs)
 
     def report_error(self, text, *args, **kwargs):
+        # Exists only for compatibility. Do not use
         if self._downloader:
             return self._downloader.report_error(text, *args, **kwargs)
 

yt_dlp/postprocessor/ffmpeg.py

@@ -288,8 +288,7 @@ class FFmpegPostProcessor(PostProcessor):
         stdout, stderr = process_communicate_or_kill(p)
         if p.returncode not in variadic(expected_retcodes):
             stderr = stderr.decode('utf-8', 'replace').strip()
-            if self.get_param('verbose', False):
-                self.report_error(stderr)
+            self.write_debug(stderr)
             raise FFmpegPostProcessorError(stderr.split('\n')[-1])
         for out_path, _ in output_path_opts:
             if out_path:

yt_dlp/postprocessor/xattrpp.py

@@ -57,8 +57,7 @@ class XAttrMetadataPP(PostProcessor):
             return [], info
 
         except XAttrUnavailableError as e:
-            self.report_error(str(e))
-            return [], info
+            raise PostProcessingError(str(e))
 
         except XAttrMetadataError as e:
             if e.reason == 'NO_SPACE':
@@ -74,5 +73,5 @@ class XAttrMetadataPP(PostProcessor):
                     msg += 'You need to use NTFS.'
                 else:
                     msg += '(You may have to enable them in your /etc/fstab)'
-                self.report_error(msg)
+                raise PostProcessingError(str(e))
             return [], info