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有沒有辦法透過設定選項或處理輸出來限制 ffmpeg 的控制台輸出？我查看了文檔，並設定了限制輸出的可用選項，但我希望可能有其他方法可以進一步限制它。我還查看了我能找到的有關 ffmpeg 詳細程度的帖子，例如這討論了 -loglevel 選項，但它沒有提供足夠的控制。
這是在不使用 -loglevel 錯誤選項完全靜音輸出的情況下可以獲得的最簡單的輸出，這不是我想要的。
ffmpeg -hide_banner -i input.mkv -c:v libx265 -crf 26 -x265-params log-level=error -vtag hvc1 -c:a ac3 -c:s mov_text output.mp4
Input #0, matroska,webm, from './input.mkv':
Metadata:
encoder : no_variable_data
creation_time : 1970-01-01T00:00:00.000000Z
Duration: 00:48:46.48, start: 0.000000, bitrate: 9619 kb/s
Chapter #0:0: start 0.000000, end 326.409000
Metadata:
title : 00:00:00.000
Chapter #0:1: start 326.409000, end 1037.912000
Metadata:
title : 00:05:26.409
Chapter #0:2: start 1037.912000, end 1516.640000
Metadata:
title : 00:17:17.912
Chapter #0:3: start 1516.640000, end 2359.732000
Metadata:
title : 00:25:16.640
Chapter #0:4: start 2359.732000, end 2887.009000
Metadata:
title : 00:39:19.732
Chapter #0:5: start 2887.009000, end 2926.475000
Metadata:
title : 00:48:07.009
Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Metadata:
BPS : 8107717
BPS-eng : 8107717
DURATION : 00:48:46.466000000
DURATION-eng : 00:48:46.466000000
NUMBER_OF_FRAMES: 70165
NUMBER_OF_FRAMES-eng: 70165
NUMBER_OF_BYTES : 2965869890
NUMBER_OF_BYTES-eng: 2965869890
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
Metadata:
BPS : 1508999
BPS-eng : 1508999
DURATION : 00:48:46.475000000
DURATION-eng : 00:48:46.475000000
NUMBER_OF_FRAMES: 274357
NUMBER_OF_FRAMES-eng: 274357
NUMBER_OF_BYTES : 552006284
NUMBER_OF_BYTES-eng: 552006284
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream #0:2(eng): Subtitle: subrip (default) (forced)
Metadata:
title : Forced
BPS : 105
BPS-eng : 105
DURATION : 00:00:18.518000000
DURATION-eng : 00:00:18.518000000
NUMBER_OF_FRAMES: 6
NUMBER_OF_FRAMES-eng: 6
NUMBER_OF_BYTES : 245
NUMBER_OF_BYTES-eng: 245
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream #0:3(eng): Subtitle: subrip
Metadata:
BPS : 61
BPS-eng : 61
DURATION : 00:47:20.754000000
DURATION-eng : 00:47:20.754000000
NUMBER_OF_FRAMES: 584
NUMBER_OF_FRAMES-eng: 584
NUMBER_OF_BYTES : 21796
NUMBER_OF_BYTES-eng: 21796
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream #0:4(eng): Subtitle: subrip
Metadata:
title : SDH
BPS : 62
BPS-eng : 62
DURATION : 00:48:07.176000000
DURATION-eng : 00:48:07.176000000
NUMBER_OF_FRAMES: 619
NUMBER_OF_FRAMES-eng: 619
NUMBER_OF_BYTES : 22653
NUMBER_OF_BYTES-eng: 22653
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (dts (dca) -> ac3 (native))
Stream #0:2 -> #0:2 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
Output #0, mp4, to './output.mp4':
Chapter #0:0: start 0.000000, end 326.409000
Metadata:
title : 00:00:00.000
Chapter #0:1: start 326.409000, end 1037.912000
Metadata:
title : 00:05:26.409
Chapter #0:2: start 1037.912000, end 1516.640000
Metadata:
title : 00:17:17.912
Chapter #0:3: start 1516.640000, end 2359.732000
Metadata:
title : 00:25:16.640
Chapter #0:4: start 2359.732000, end 2887.009000
Metadata:
title : 00:39:19.732
Chapter #0:5: start 2887.009000, end 2926.475000
Metadata:
title : 00:48:07.009
Stream #0:0: Video: hevc (libx265) (hvc1 / 0x31637668), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc (default)
Metadata:
BPS : 8107717
BPS-eng : 8107717
DURATION : 00:48:46.466000000
DURATION-eng : 00:48:46.466000000
NUMBER_OF_FRAMES: 70165
NUMBER_OF_FRAMES-eng: 70165
NUMBER_OF_BYTES : 2965869890
NUMBER_OF_BYTES-eng: 2965869890
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
encoder : Lavc libx265
Side data:
cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 448 kb/s (default)
Metadata:
BPS : 1508999
BPS-eng : 1508999
DURATION : 00:48:46.475000000
DURATION-eng : 00:48:46.475000000
NUMBER_OF_FRAMES: 274357
NUMBER_OF_FRAMES-eng: 274357
NUMBER_OF_BYTES : 552006284
NUMBER_OF_BYTES-eng: 552006284
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
encoder : Lavc ac3
Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874) (default) (forced)
Metadata:
title : Forced
BPS : 105
BPS-eng : 105
DURATION : 00:00:18.518000000
DURATION-eng : 00:00:18.518000000
NUMBER_OF_FRAMES: 6
NUMBER_OF_FRAMES-eng: 6
NUMBER_OF_BYTES : 245
NUMBER_OF_BYTES-eng: 245
_STATISTICS_WRITING_APP: no_variable_data
_STATISTICS_WRITING_APP-eng: no_variable_data
_STATISTICS_WRITING_DATE_UTC: 1970-01-01 00:00:00
_STATISTICS_WRITING_DATE_UTC-eng: 1970-01-01 00:00:00
_STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
_STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
encoder : Lavc mov_text
frame= 1047 fps= 58 q=33.7 size= 2560kB time=00:00:44.37 bitrate= 472.6kbits/s speed=2.48x
這就是我理想中想要擁有的：
ffmpeg -hide_banner -i input.mkv -c:v libx265 -crf 26 -x265-params log-level=error -vtag hvc1 -c:a ac3 -c:s mov_text output.mp4
Input #0, matroska,webm, from './input.mkv':
Stream #0:0: Video: h264 (High), yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
Stream #0:2(eng): Subtitle: subrip (default) (forced)
Stream #0:3(eng): Subtitle: subrip
Stream #0:4(eng): Subtitle: subrip
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (dts (dca) -> ac3 (native))
Stream #0:2 -> #0:2 (subrip (srt) -> mov_text (native))
Press [q] to stop, [?] for help
Output #0, mp4, to './output.mp4':
Stream #0:0: Video: hevc (libx265) (hvc1 / 0x31637668), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=-1--1, 23.98 fps, 24k tbn, 23.98 tbc (default)
Stream #0:1(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 448 kb/s (default)
Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874) (default) (forced)
frame= 1047 fps= 58 q=33.7 size= 2560kB time=00:00:44.37 bitrate= 472.6kbits/s speed=2.48x
如果沒有辦法用 ffmpeg 做到這一點，如果有人能給出一個關於如何從輸出中過濾掉所有不需要的文字的範例，那就太好了。
編輯：按照使用 grep 的建議，我想出了這個，這讓我幾乎到了那裡。唯一剩下的問題是 grep 使進度顯示在連續的新行上，而我無法對此進行過濾。
ffmpeg -progress pipe:1 -i input.mkv -c:v libx265 -vtag hvc1 -c:a copy -c:s mov_text output.mp4 2>&1 | egrep "Input.*|Duration.*|Stream.*|Output.*|frame=.*"
給出這個輸出：
Input #0, matroska,webm, from './input.mkv':
Duration: 00:43:04.59, start: 0.000000, bitrate: 7253 kb/s
Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
Stream #0:2(eng): Subtitle: subrip (default) (forced)
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (copy)
Stream #0:2 -> #0:2 (subrip (srt) -> mov_text (native))
Output #0, mp4, to '/output.mp4':
Stream #0:0(eng): Video: hevc (libx265) (hvc1 / 0x31637668), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 23.98 fps, 13978 tbn, 23.98 tbc (default)
Stream #0:1(eng): Audio: dts (DTS) (mp4a / 0x6134706D), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
Stream #0:2(eng): Subtitle: mov_text (tx3g / 0x67337874) (default) (forced)
frame=92 92 fps=0.0 q=29.8 size= 0kB time=00:00:04.52 bitrate= 0.4kbits/s speed=9.01x
frame=17676 fps=174 q=31.2 size= 0kB time=00:00:08.04 bitrate= 0.3kbits/s speed=7.94x
frame=25555 fps=168 q=35.8 size= 256kB time=00:00:11.38 bitrate= 184.4kbits/s speed=7.48x
frame=29191 fps=143 q=34.4 size= 512kB time=00:00:12.88 bitrate= 325.7kbits/s speed=6.34x
答案1
由於您想創建自己的日誌記錄級別，因此您需要自己完成。
例如，您可能會使用以下內容：
unbuffer ffmpeg … | unbuffer grep PATTERN
其中 PATTERN 是一個正規表示式，它定義您希望傳遞的輸出行。