【发布时间】：2020-08-04 06:46:01
【问题描述】：
我正在尝试使用 ffmpeg 将封面添加到 ogg 文件中：
这是我的 source.ogg 和 source.jpg 文件：
$ ffprobe -hide_banner source.ogg
Input #0, ogg, from 'source.ogg':
Duration: 00:03:02.45, start: 0.007500, bitrate: 73 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
$ identify source.jpg
source.jpg JPEG 480x360 480x360+0+0 8-bit DirectClass 15.1KB 0.000u 0:00.000
我试过这个：
$ ffmpeg -hide_banner -i source.ogg -i source.jpg -map 0 -map 1 -c:a copy -c copy -map_metadata 0 dest.ogg -y && echo && ffprobe -hide_banner dest.ogg
Input #0, ogg, from 'source.ogg':
Duration: 00:03:02.45, start: 0.007500, bitrate: 73 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
Input #1, image2, from 'source.jpg':
Duration: 00:00:00.04, start: 0.000000, bitrate: 3023 kb/s
Stream #1:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 480x360 [SAR 1:1 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
[ogg @ 0x5655578064c0] Unsupported codec id in stream 1
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (copy)
Last message repeated 1 times
[ogg @ 0x5655577e8540] Format ogg detected only with low score of 1, misdetection possible!
dest.ogg: End of file
我也找到了this answer，但它没有解释如何使用ffmpeg。
我在 ogg 容器中读到了一个“METADATA_BLOCK_PICTURE”元数据，它可能包含 base64 中的图片，所以我尝试了这个：
$ ffmpeg -hide_banner -i source.ogg -map 0 -c:a copy -c copy -metadata METADATA_BLOCK_PICTURE="$(base64 source.jpg)" dest.ogg
Input #0, ogg, from 'source.ogg':
Duration: 00:03:02.45, start: 0.007500, bitrate: 73 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
File 'dest.ogg' already exists. Overwrite ? [y/N] y
Output #0, ogg, to 'dest.ogg':
Metadata:
METADATA_BLOCK_PICTURE: /9j/4AAQSkZJRgABAQAAAQABAAD/2wCEABALDA4MChAODQ4SERATGCgaGBYWGDEjJR0oOjM9PDkz
: ODdASFxOQERXRTc4UG1RV19iZ2hnPk1xeXBkeFxlZ2MBERISGBUYLxoaL2NCOEJjY2NjY2NjY2Nj
..............................................................................
: nVmaS2E/urUWVbH6ORI9z2l8zyRfFpkLooIHSBuk9lFFoC6OBnP1SON8rEooqM2WOVHDdRRAAUVK
: KiiCWRRRRBJ//9k=
encoder : Lavf58.20.100
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
METADATA_BLOCK_PICTURE: /9j/4AAQSkZJRgABAQAAAQABAAD/2wCEABALDA4MChAODQ4SERATGCgaGBYWGDEjJR0oOjM9PDkz
: ODdASFxOQERXRTc4UG1RV19iZ2hnPk1xeXBkeFxlZ2MBERISGBUYLxoaL2NCOEJjY2NjY2NjY2Nj
: Y2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY//AABEIAWgB4AMBIgACEQED
..............................................................................
: nVmaS2E/urUWVbH6ORI9z2l8zyRfFpkLooIHSBuk9lFFoC6OBnP1SON8rEooqM2WOVHDdRRAAUVK
: KiiCWRRRRBJ//9k=
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 1658kB time=00:03:02.41 bitrate= 74.5kbits/s speed=1.01e+03x
video:0kB audio:1624kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.100392%
它有点“有效”，但ffplay 和mpv 都无法解析封面：
$ ffplay -hide_banner dest.ogg
[ogg @ 0x5655577e8540] Failed to parse cover art block.
Input #0, ogg, from 'dest.ogg':
Duration: 00:03:02.44, start: 0.000000, bitrate: 74 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
3.95 M-A: -0.000 fd= 0 aq= 14KB vq= 0KB sq= 0B f=0/0
$ mpv dest.ogg
Playing: dest.ogg
[ffmpeg/demuxer] ogg: Failed to parse cover art block.
(+) Audio --aid=1 (opus 2ch 48000Hz)
AO: [pulse] 48000Hz stereo 2ch float
A: 00:00:03 / 00:03:02 (2%)
Exiting... (Quit)
我还尝试了-metadata:s:a 以及base64 的--wrap 0（我忘记指定了，哎呀 :)）：
$ ffmpeg -i source.ogg -map 0 -c:a copy -c copy -metadata:s:a METADATA_BLOCK_PICTURE="$(base64 --wrap 0 source.jpg)" dest.ogg
Input #0, ogg, from 'source.ogg':
Duration: 00:03:02.45, start: 0.007500, bitrate: 73 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
File 'dest.ogg' already exists. Overwrite ? [y/N] y
Output #0, ogg, to 'dest.ogg':
Metadata:
encoder : Lavf58.20.100
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
METADATA_BLOCK_PICTURE: /9j/4AAQSkZJRgABAQAAAQABAAD/2wCEABALDA4MChAODQ4SERATGCgaGBYWGDEjJR0oOjM9PDkzODdASFxOQERXRTc4UG1RV19iZ2hnPk1xeXBkeFxlZ2MBERISGBUYLxoaL2NCOEJjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY2NjY//AABEIAWgB4AMBIgACEQEDEQH/xAAaAAACAwEBAAAAAAAAAAA
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
size= 1658kB time=00:03:02.41 bitrate= 74.5kbits/s speed=1.22e+03x
video:0kB audio:1624kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.084397%
但dest.ogg jpg 封面仍然无法正确读取：
$ ffprobe -hide_banner dest.ogg
[ogg @ 0x5655577e8540] Invalid picture type: -2555936.
[ogg @ 0x5655577e8540] Could not read mimetype from an attached picture.
Input #0, ogg, from 'dest.ogg':
Duration: 00:03:02.44, start: 0.000000, bitrate: 74 kb/s
Stream #0:0: Audio: opus, 48000 Hz, stereo, fltp
Metadata:
DURATION : 00:03:02.441000000
ENCODER : Lavf58.20.100
你能帮帮我吗？
【问题讨论】：
-
到目前为止找到解决方案是否幸运？
-
@cregox 我刚刚更新了我的问题的标题，因为它不能代表我需要的内容。可以看看吗？
-
是的。我的类似问题已关闭，但没有回答。
opusenc显然不能像ffmpeg那样压缩。事实上，我只能用 16k 比特率获得我想要的两倍大小。我希望您已经有了解决方案……您尝试过该脚本或其他类似工具了吗？
标签： ffmpeg command-line-interface ogg