Opened 11 years ago
Last modified 4 years ago
#3623 reopened defect
Mixed results writing M4A metadata
| Reported by: | svnpenn | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | git-master | Keywords: | mov metadata |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Given this file
http://bitbucket.org/svnpenn/a/downloads/superuser.mp4
I am having mixed results writing metadata. For example these commands
ffmpeg -i superuser.mp4 -c copy good.aac ffmpeg -i good.aac -c copy -bsf aac_adtstoasc -metadata title=Confetti \ -movflags faststart good.m4a
Will generate an M4A file that plays correctly with metadata that is recognized. However this command
ffmpeg -i superuser.mp4 -c copy -vn -movflags faststart \ -metadata title=Confetti bad.m4a
Generates a file that plays correctly, but my player does not recognize the
metadata. Note I also tried adding -bsf aac_adtstoasc to the bad command to no
avail. How can I tweak the second command to get it working?
Command-line output
http://gist.github.com/svnpenn/82e7f7685084759c7483
Source question
http://superuser.com/q/750627
Attachments (2)
Change History (19)
comment:1 by , 11 years ago
| Keywords: | mov metadata added |
|---|
comment:3 by , 11 years ago
Replying to svnpenn:
@cehoyos , did you even read the ticket? Both the problem command and complete
output are already included.
Where? I am sorry, I was unable to see the console output in your ticket description.
Please always post the complete, uncut console output here, external resources may disappear.
comment:5 by , 11 years ago
| Resolution: | → needs_more_info |
|---|---|
| Status: | new → closed |
Please feel free to reopen this ticket if you can provide the missing information.
by , 11 years ago
| Attachment: | confetti.mp4 added |
|---|
by , 11 years ago
| Attachment: | planes.mp4 added |
|---|
comment:6 by , 11 years ago
@cehoyos my arrogance has cost me, I apologize. It seems "-f mp4" does not work
in all cases. I found that with the attached "confetti.mp4", only "-f mp4"
produced desired result while with "planes.mp4", only "-f ipod" or "-f f4v"
produce desired result.
comment:7 by , 11 years ago
ffmpeg started on 2014-05-09 at 02:28:01
Report written to "ffmpeg-20140509-022801.log"
Command line:
"C:\\ffmpeg.exe" -i confetti.mp4 -c copy -vn -movflags faststart -metadata "title=Confetti" -report confetti.m4a
ffmpeg version git-2014-01-22-94a5241 Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 21 2014 19:33:07 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --disable-doc --enable-nonfree --enable-libx264 --enable-libfdk-aac --arch=x86_64 --target-os=mingw32 --logfile=/dev/stdout --extra-ldflags=-static --cross-prefix=x86_64-w64-mingw32-
libavutil 52. 63.100 / 52. 63.100
libavcodec 55. 48.102 / 55. 48.102
libavformat 55. 25.101 / 55. 25.101
libavdevice 55. 5.102 / 55. 5.102
libavfilter 4. 1.100 / 4. 1.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument 'confetti.mp4'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-vn' ... matched as option 'vn' (disable video) with argument '1'.
Reading option '-movflags' ... matched as AVOption 'movflags' with argument 'faststart'.
Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'title=Confetti'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option 'confetti.m4a' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file confetti.mp4.
Successfully parsed a group of options.
Opening an input file: confetti.mp4.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000001846c60] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000001846c60] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000001846c60] Before avformat_find_stream_info() pos: 2055829 bytes read:39809 seeks:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000001846c60] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000001846c60] After avformat_find_stream_info() pos: 819 bytes read:72577 seeks:2 frames:2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'confetti.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.25.101
Duration: 00:00:10.01, start: 0.000000, bitrate: 1643 kb/s
Stream #0:0(und), 1, 1/24000: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1444 kb/s, 23.98 fps, 23.98 tbr, 24k tbn, 47.95 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und), 1, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
Successfully opened the file.
Parsing a group of options: output file confetti.m4a.
Applying option c (codec name) with argument copy.
Applying option vn (disable video) with argument 1.
Applying option metadata (add metadata) with argument title=Confetti.
Successfully parsed a group of options.
Opening an output file: confetti.m4a.
Successfully opened the file.
Output #0, ipod, to 'confetti.m4a':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Confetti
encoder : Lavf55.25.101
Stream #0:0(und), 0, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
[ipod @ 000000000418f6c0] Starting second pass: moving the moov atom to the beginning of the file
[AVIOContext @ 0000000001859ae0] Statistics: 240981 bytes read, 0 seeks
size= 238kB time=00:00:10.00 bitrate= 194.6kbits/s
video:0kB audio:235kB subtitle:0 global headers:0kB muxing overhead 1.040919%
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 00000000018cfc60] Statistics: 32 seeks, 462 writeouts
[AVIOContext @ 000000000198fbc0] Statistics: 1856308 bytes read, 33 seeks
comment:8 by , 11 years ago
ffmpeg started on 2014-05-09 at 02:29:04
Report written to "ffmpeg-20140509-022904.log"
Command line:
"C:\\ffmpeg.exe" -i planes.mp4 -c copy -vn -movflags faststart -metadata "title=Planes" -report planes.m4a
ffmpeg version git-2014-01-22-94a5241 Copyright (c) 2000-2014 the FFmpeg developers
built on Jan 21 2014 19:33:07 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --disable-doc --enable-nonfree --enable-libx264 --enable-libfdk-aac --arch=x86_64 --target-os=mingw32 --logfile=/dev/stdout --extra-ldflags=-static --cross-prefix=x86_64-w64-mingw32-
libavutil 52. 63.100 / 52. 63.100
libavcodec 55. 48.102 / 55. 48.102
libavformat 55. 25.101 / 55. 25.101
libavdevice 55. 5.102 / 55. 5.102
libavfilter 4. 1.100 / 4. 1.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 17.104 / 0. 17.104
libpostproc 52. 3.100 / 52. 3.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument 'planes.mp4'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option '-vn' ... matched as option 'vn' (disable video) with argument '1'.
Reading option '-movflags' ... matched as AVOption 'movflags' with argument 'faststart'.
Reading option '-metadata' ... matched as option 'metadata' (add metadata) with argument 'title=Planes'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option 'planes.m4a' ... matched as output file.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input file planes.mp4.
Successfully parsed a group of options.
Opening an input file: planes.mp4.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000336c20] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000336c20] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000336c20] Before avformat_find_stream_info() pos: 357849 bytes read:36726 seeks:1
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000336c20] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0000000000336c20] After avformat_find_stream_info() pos: 25214 bytes read:69494 seeks:2 frames:2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'planes.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf55.25.101
Duration: 00:00:10.01, start: 0.000000, bitrate: 286 kb/s
Stream #0:0(und), 1, 1/12288: Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 90 kb/s, 6 fps, 6 tbr, 12288 tbn, 12 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und), 1, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
Successfully opened the file.
Parsing a group of options: output file planes.m4a.
Applying option c (codec name) with argument copy.
Applying option vn (disable video) with argument 1.
Applying option metadata (add metadata) with argument title=Planes.
Successfully parsed a group of options.
Opening an output file: planes.m4a.
Successfully opened the file.
Output #0, ipod, to 'planes.m4a':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : Planes
encoder : Lavf55.25.101
Stream #0:0(und), 0, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 192 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream mapping:
Stream #0:1 -> #0:0 (copy)
Press [q] to stop, [?] for help
No more output streams to write to, finishing.
[ipod @ 000000000033f0e0] Starting second pass: moving the moov atom to the beginning of the file
[AVIOContext @ 000000000033e4a0] Statistics: 240441 bytes read, 0 seeks
size= 237kB time=00:00:10.00 bitrate= 194.2kbits/s
video:0kB audio:235kB subtitle:0 global headers:0kB muxing overhead 1.042425%
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 00000000003bfc00] Statistics: 32 seeks, 462 writeouts
[AVIOContext @ 00000000003dfbc0] Statistics: 364281 bytes read, 4 seeks
comment:9 by , 11 years ago
| Resolution: | needs_more_info |
|---|---|
| Status: | closed → reopened |
comment:10 by , 11 years ago
This command also works
ffmpeg -i confetti.mp4 -c copy -f adts - | ffmpeg -i - -c copy -bsf aac_adtstoasc -movflags faststart \ -metadata title=Confetti good.m4a
Note, this issue was discussed over 3 years ago
http://lists.infradead.org/pipermail/get_iplayer/2011-March/001171.html
comment:11 by , 4 years ago
| Version: | unspecified → git-master |
|---|
The question afaict is:
How did you create the input file? The extradata that this file contains is copied into the output file.
If there ever was an issue that can be fixed in the FFmpeg source code, I believe it is still reproducible.
comment:12 by , 4 years ago
Ok yes, this is still an issue. If I take this file:
http://jplayer.org/audio/m4a/Miaow-02-Hidden.m4a
My player will play the audio, and read the metadata. But if I do this:
ffmpeg -i Miaow-02-Hidden.m4a -c copy -movflags faststart out.m4a
My player will play the audio, but it says no metadata.
comment:13 by , 4 years ago
What happens if you pipe the contents of the new file into a second ffmpeg process?
comment:14 by , 4 years ago
Correcting myself. I can get correct metadata with this file [1], if I add "-f mp4":
ffmpeg -i Miaow-02-Hidden.m4a -c copy -movflags faststart -f mp4 out.m4a
However this file:
youtube-dl -f 140 http://youtube.com/watch?v=j-70HbaR4g4
I can only get correct metadata, if I destroy and rebuild the file like this:
ffmpeg -i 'Confetti (Remastered)-j-70HbaR4g4.m4a' -c copy good.aac ffmpeg -i good.aac -c copy -bsf aac_adtstoasc -metadata title=Confetti -movflags faststart good.m4a
comment:15 by , 4 years ago
How is this related?
You originally described that if you pipe the content of file into ffmpeg you get different output (that also behaves differently) than the output from one (theoretically identical) ffmpeg invocation.
comment:16 by , 4 years ago
You originally described that if you pipe the content of file into ffmpeg you get different output (that also behaves differently) than the output from one (theoretically identical) ffmpeg invocation.
No, originally I used these commands:
ffmpeg -i superuser.mp4 -c copy good.aac ffmpeg -i good.aac -c copy -bsf aac_adtstoasc -metadata title=Confetti -movflags faststart good.m4a
as shown at the top of this page. Later, I did use this as well:
ffmpeg -i confetti.mp4 -c copy -f adts - | ffmpeg -i - -c copy -bsf aac_adtstoasc -movflags faststart -metadata title=Confetti good.m4a
but the difference is irrelevant, as both do the same thing, only one uses a pipe, and one uses a temp file.
comment:17 by , 4 years ago
Based on Tom's answer, I think I was able to solve this. If I run these commands:
ffmpeg -i in.m4a -c copy -movflags faststart -metadata title=Confetti bad.m4a ffmpeg -i in.m4a -c copy -movflags faststart -metadata title=Confetti ` -map_metadata -1 good.m4a mp4dump bad.m4a > bad.txt mp4dump good.m4a > good.txt git diff bad.txt good.txt
I get this result:
- handler_name = ISO Media file produced by Google Inc. + handler_name = SoundHandler
I tested some more, and it seems any handler_name more than 29 characters will fail, which is probably 30 including a null byte, or maybe a length byte. Here is an example that will just barely pass:
ffmpeg -i in.m4a -c copy -movflags faststart -metadata title=Confetti ` -metadata:s handler_name=SoundHandlerSoundHandlerSound good.m4a
Please post the command line that does not produce the expected output file together with the complete, uncut console output here to make this a valid ticket.