I need to extract metadata track from a MP4 file and save as separate file. I see that, using ffmpeg I can extract standard tracks like Audio or Video or Subtitle track and save it as a new file. For ex: to save audio track I use the command below:
ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac
But my need is to save a proprietary metadata track. Any pointers will be helpful.
Here is output of ffmpeg to know different traks that are present in the file. Particuarly, I am interested in extracting track corresponding to Stream #0:3(eng)...
C:\Users\rkumar\Documents\work\tools\ffmpeg\bin>ffmpeg.exe -i input.MP4
ffmpeg version N-57176-g64b3aaf Copyright (c) 2000-2013 the FFmpeg developers
built on Oct 15 2013 21:32:52 with gcc 4.8.1 (GCC)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.MP4':
Metadata:
major_brand : mp41
minor_version : 538120216
compatible_brands: mp41
creation_time : 1970-01-01 00:00:09
Duration: 00:00:10.52, start: 0.000000, bitrate: 834 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc, bt709),
854x480 [SAR 1:1 DAR 427:240], 679 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : AVC
timecode : 00:00:13:22
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : AAC
timecode : 00:00:13:22
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : TCD
timecode : 00:00:13:22
Stream #0:3(eng): Data: none (ssmd / 0x646D7067), 5 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : MET
Stream #0:4(eng): Data: none (fdsc / 0x63736466), 10 kb/s (default)
Metadata:
creation_time : 1970-01-01 00:00:09
handler_name : SOS
You can extract the meta data track with ffmpeg:
ffmpeg -i input-video.avi -map 0:1 -c copy -copy_unknown -f data data.bin
This will save the meta data in data.bin which is a binary file so there will be some additional processing required to get the data out.
Related
I'm editing a video clip with ffmpeg. The original does not play in Firefox browser by itself. It does normally in Chromium. I do something like:
ffmpeg -ss 00:05:10 -i INPUT.mp4 -c copy OUTPUT.mp4
the resulting clip plays in Firefox but there's no audio. This happens in Firefox (82.0.3), but not in Chromium (86.0.4240.75). In chromium the sound is ok.
If audio is reencoded with
ffmpeg -ss 00:05:10 -i INPUT.mp4 -c:v copy -ab 360kb OUTPUT.mp4
resulting clip is playing ok in Firefox.
Could anyone explain what is happening here and is it possible to cut the mp4 without reencoding audio resulting in a clip that plays in Firefox too?
Some data:
ffmpeg version 3.4.8-0ubuntu0.2
ffprobe INPUT.mp4:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'INPUT.mp4':
Metadata:
major_brand : isom
minor_version : 1
compatible_brands: iso4avc1isom
creation_time : 2020-11-13T18:45:37.000000Z
com.apple.proapps.clipID: INPUT
com.blackmagic-design.camera.dateRecorded: 2020:11:13
com.apple.proapps.cameraName: 0
com.blackmagic-design.camera.uuid: BDB766E79E646CBB82E3EB986EA1EA-0
Duration: 02:01:38.00, start: 0.000000, bitrate: 6047 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080, 5909 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 50 tbc (default)
Metadata:
creation_time : 2020-11-13T18:45:37.000000Z
handler_name : ?Apple Alias Data Handler
encoder : H264/AVC
timecode : 19:45:35:04
Stream #0:1(eng): Data: none (tmcd / 0x64636D74) (default)
Metadata:
creation_time : 2020-11-13T18:45:37.000000Z
handler_name : ?Apple Alias Data Handler
timecode : 19:45:35:04
Stream #0:2(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default)
Metadata:
creation_time : 2020-11-13T18:45:37.000000Z
handler_name : ?Apple Alias Data Handler
timecode : 19:45:35:04
ffprobe OUTPUT.mp4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'OUTPUT.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Duration: 01:34:48.02, start: -0.016000, bitrate: 6022 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 5889 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 12800 tbn, 25600 tbc (default)
Metadata:
handler_name : VideoHandler
timecode : 19:45:35:04
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
handler_name : TimeCodeHandler
timecode : 19:45:35:04
ffprobe the OUTPUT.mp4 that has audio re-encoded and works in Firefox:
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.83.100
Duration: 01:34:48.04, start: 0.000000, bitrate: 6160 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1920x1080, 5889 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 12800 tbn, 25600 tbc (default)
Metadata:
handler_name : VideoHandler
timecode : 19:45:35:04
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 265 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Data: none (tmcd / 0x64636D74)
Metadata:
handler_name : TimeCodeHandler
timecode : 19:45:35:04
EDIT:
I'm providing links to original files, but a bit of warning, they are 4-5GB big each:
original recording from blackmagic switcher/capture/recorder (this does not play in firefox at all, but does in Chromium)
cut version made with -codec copy (plays in firefox but no audio. plays in chromium ok)
cut version with re-encoded audio (plays ok in both firefox and chromium)
Using ffmpeg to replace audio in a QuickTime with audio from a WAV.
Anyone know why I'm getting Referenced QT chapter track not found?
Command:
$ ffmpeg \
-i "$video" -t 25 \
-i "$audio" -map 0:v -c:v copy -map 1:a -c:a pcm_s24le -ar 48000 \
-hide_banner "$output"
Output:
[mov,mp4,m4a,3gp,3g2,mj2 # 0x7faf62010600] Referenced QT chapter track not found
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'video.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
creation_time : 2018-11-06T09:27:43.000000Z
Duration: 00:00:25.00, start: 0.000000, bitrate: 186987 kb/s
Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080, 185115 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
Metadata:
creation_time : 2018-11-06T09:27:43.000000Z
handler_name : Apple Alias Data Handler
encoder : Apple ProRes 422 (HQ)
timecode : 00:00:00:00
Stream #0:1(eng): Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, stereo, s16, 1536 kb/s (default)
Metadata:
creation_time : 2018-11-06T09:27:43.000000Z
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
Metadata:
creation_time : 2018-11-06T09:27:43.000000Z
handler_name : Apple Alias Data Handler
timecode : 00:00:00:00
Guessed Channel Layout for Input Stream #1.0 : stereo
Input #1, wav, from 'audio.wav':
Metadata:
encoded_by : Pro Tools
originator_reference: aaOpKJaTN7Nk
date : 2018-11-08
creation_time : 13:53:50
time_reference : 166698000
Duration: 00:00:25.00, bitrate: 2128 kb/s
Stream #1:0: Audio: pcm_s24le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, s32 (24 bit), 2116 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #1:0 -> #0:1 (pcm_s24le (native) -> pcm_s24le (native))
Press [q] to stop, [?] for help
Output #0, mov, to 'test19.mov':
Metadata:
major_brand : qt
minor_version : 537199360
compatible_brands: qt
encoder : Lavf58.12.100
Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 185115 kb/s, 0.04 fps, 25 tbr, 12800 tbn, 25 tbc (default)
Metadata:
creation_time : 2018-11-06T09:27:43.000000Z
handler_name : Apple Alias Data Handler
encoder : Apple ProRes 422 (HQ)
timecode : 00:00:00:00
Stream #0:1: Audio: pcm_s24le (in24 / 0x34326E69), 48000 Hz, stereo, s32 (24 bit), 2304 kb/s
Metadata:
encoder : Lavc58.18.100 pcm_s24le
frame= 625 fps=277 q=-1.0 Lsize= 566343kB time=00:00:24.96 bitrate=185876.0kbits/s speed=11.1x
video:564928kB audio:1406kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.001496%
Same error with -map 0:v:0
Output looks to be created without errors.
What the error means is that MOV header indicates that a text track with chapter titles and timestamps is present but FFmpeg can't actually find that track in the file.
Adding -ignore_chapters 1 before -i "$video" will stop ffmpeg from looking for that track.
While traversing my personal video collection with ffprobe, I ran into several such errors, including:
[mov,mp4,m4a,3gp,3g2,mj2 # 000000000039a980] Referenced QT chapter
track not found
and...
[mp3float # 000000000079bb80] Header missing
From what I can tell, these are non-fatal errors that seem to simply be an indicator of the video's original encoder doing a bad or incomplete job, and so for a video collection that's large enough and sourced from enough disparate sources, I'd guess that it would be a mathematical likelihood to run into at least a few of these errors while analysing the entire collection. For obvious reasons, however, it makes sense to want to suppress these errors since they aren't needed and look unseemly in STDOUT.
There seems to be no such -ignore-chapters option for ffprobe, but I was able to suppress all of these non-fatal errors by adding -v fatal, which changes the command's loglevel to only display fatal errors (the default shows fatal and non-fatal errors, warnings and extra information). This option doesn't suppress ffprobe's output, which is printed as normal.
I have a script that automates encode and concat a series of input video files.
I'm trying to get encode and concat in a single command.
At the moment it does not work causing immense empty pauses in the final video output.
I would like to get the result with concat demux instead of concat protocol because it is much harder to automate in a script
Do you know if it is possible to archive this result with concat demux?
Thanks a lot!
Massimo
ENCODE / CONCAT 1080p
for f in ./*.mp4; do echo "file '$f'" >> list.txt; done
ffmpeg -f concat -safe 0 -y -i list.txt -i ../logo/logo.png -c:a aac -b:a 384k -ar 48000 -ac 2 -af aresample=async=1000 -c:v libx264 -x264opts keyint=50:min-keyint=50:no-scenecut -bf 0 -r 25 -b:v 4800k -maxrate 4800k -bufsize 3000k -profile:v main -crf 22 -filter_complex "[0:v][1:v]overlay=main_w-overlay_w-10:10,scale=1920:1080,setsar=1" ../buffer/1080set.mp4
It seems to add long pause at low frame-rate:
[mov,mp4,m4a,3gp,3g2,mj2 # 0x7fb03f05e600] Auto-inserting h264_mp4toannexb bitstream filter
frame= 9745 fps= 13 q=27.0 size= 186368kB time=00:18:52.56 bitrate=1348.0kbits
frame= 9745 fps= 13 q=27.0 size= 186368kB time=00:18:56.57 bitrate=1343.3kbits/
frame= 9745 fps= 13 q=27.0 size= 186368kB time=00:19:00.65 bitrate=1338.5kbits/
frame= 9745 fps= 13 q=27.0 size= 186368kB time=00:19:02.29 bitrate=1336.5kbits/
More than 1000 frames duplicated
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1.mp4':
Metadata:
major_brand : mp42
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 2016-02-27T22:25:49.000000Z
encoder : HandBrake 0.10.5 2016021100
Duration: 00:06:29.87, start: 0.000000, bitrate: 3447 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 768x432, 3282 kb/s, 25 fps, 25 tbr, 90k tbn, 180k tbc (default)
Metadata:
creation_time : 2016-02-27T22:25:49.000000Z
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 159 kb/s (default)
Metadata:
creation_time : 2016-02-27T22:25:49.000000Z
handler_name : Stereo
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '2.mp4':
Metadata:
major_brand : M4V
minor_version : 1
compatible_brands: M4V mp42isom
creation_time : 2016-02-27T18:52:37.000000Z
Duration: 00:07:16.93, start: 0.000000, bitrate: 1184 kb/s
Stream #1:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 768x432, 991 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata:
creation_time : 2016-02-27T18:52:37.000000Z
handler_name : Mainconcept MP4 Video Media Handler
encoder : AVC Coding
Stream #1:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 189 kb/s (default)
Metadata:
creation_time : 2016-02-27T18:52:37.000000Z
handler_name : Mainconcept MP4 Sound Media Handler
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '3.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2017-06-27T17:58:17.000000Z
Duration: 00:05:05.05, start: 0.000000, bitrate: 2622 kb/s
Stream #2:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 768x432, 2301 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata:
creation_time : 2017-06-27T17:58:17.000000Z
handler_name : Alias Data Handler
encoder : AVC Coding
Stream #2:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2017-06-27T17:58:17.000000Z
handler_name : Alias Data Handler
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '4.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: mp42mp41
creation_time : 2017-06-27T17:53:32.000000Z
Duration: 00:06:47.36, start: 0.000000, bitrate: 3144 kb/s
Stream #3:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 768x432, 2819 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc (default)
Metadata:
creation_time : 2017-06-27T17:53:32.000000Z
handler_name : Alias Data Handler
encoder : AVC Coding
Stream #3:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 317 kb/s (default)
Metadata:
creation_time : 2017-06-27T17:53:32.000000Z
handler_name : Alias Data Handler
concat demxuer
The concat demuxer needs all inputs to have the same formats, number of streams, type of streams, order of streams (or use exact_stream_id), timebase, frame rate, audio sample rate, audio channel layout, and it is also recommended to have the same width and height.
In your case the timebase (tbn) of the first input is different than the rest. You can pre-process this input to conform it to the others:
ffmpeg -i 1.mp4 -c copy -video_track_timescale 25k 1_reset.mp4
Then run your command using the concat demuxer.
concat filter
Because you're re-encoding anyway it may be easier for you to use the concat filter. This allows you to conform each input using various filters then concate all in one command. There are several examples of such use on this site.
Is it possible to manually embed timed text metadata into MP4 files?
I have a TTML / SRT file with the metadata. I just need to embed the text data without doing any encoding the video / audio.
EDIT:
We used to do the metadata injecting using on Wowza server which we use for live streaming. What I need to do is manually inject the metadata in to prerecorded MP4 files without running the video through Wowza.
Here is one such video file that was processed by Wowza:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'metadata-back.mp4':
Metadata:
major_brand : f4v
minor_version : 0
compatible_brands: isommp42m4v
creation_time : 2015-04-16 11:12:39
Duration: 00:00:11.70, start: 0.000000, bitrate: 1373 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 1352 kb/s, 28.60 fps, 30 tbr, 90k tbn, 60 tbc (default)
Metadata:
creation_time : 2015-04-16 11:12:39
handler_name : WowzaStreamingEngine
encoder : WowzaStreamingEngine
Stream #0:1(eng): Audio: speex (spex / 0x78657073), 16000 Hz, mono, s16, 17 kb/s (default)
Metadata:
creation_time : 2015-04-16 11:12:39
handler_name : WowzaStreamingEngine
Stream #0:2(eng): Data: none (amf0 / 0x30666D61), 0 kb/s (default)
Metadata:
creation_time : 2015-04-16 11:12:39
handler_name : WowzaStreamingEngine
Now if I run the command ffmpeg -i new-meta.mp4 -i sub.srt -c copy -c:s mov_text -movflags +faststart out.mp4 and if I run ffmpeg -i out.mp4, I get this:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'out.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf56.4.101
Duration: 00:00:07.27, start: 0.000000, bitrate: 925 kb/s
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1366x768 [SAR 1:1 DAR 683:384], 920 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Subtitle: mov_text (tx3g / 0x67337874), 0 kb/s (default)
Metadata:
handler_name : SubtitleHandler
Now as you can see the text is embedded with a different codec (is this the right term?). Also I dont see an audio track as well.
Hope my question is clear enough. I need a way to embed metadata (from srt / ttml) into an MP4 video it should be embedded in amf format (again is this the right term?)
ffmpeg -i in.mp4 -i subs.srt -c copy -c:s mov_text -movflags +faststart out.mp4
Support for 3GPP TS 26.245 Timed Text ("mov_text") in MP4 may vary according to the player.
I want to change the video metadata.
Orginal video info(ffmpeg -i video.mp4)
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
creation_time : 2007-11-22 09:11:58
Duration: 00:00:52.70, start: 0.000000, bitrate: 235 kb/s
Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 107 kb/s
Metadata:
creation_time : 2007-11-22 09:11:58
handler_name : (C) 2007 Google Inc. v06.24.2007.
Stream #0:1(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 140x96 [SAR 1:1 DAR 35:24], 125 kb/s, 10 fps, 10 tbr, 10k tbn, 20k tbc
Metadata:
creation_time : 2007-11-22 09:11:58
handler_name : (C) 2007 Google Inc. v06.24.2007.
My ffmpeg shell code:
ffmpeg -i test.mp4 -metadata handler_name="Ahmetka" -i logo.png -filter_complex "overlay=(main_w-overlay_w):(main_h-overlay_h)" output.flv
Output video info(ffmpeg -i output.flv)
Input #0, flv, from 'output.flv':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isomavc1mp42
creation_time : 2007-11-22 09:11:58
encoder : Lavf54.11.100
Duration: 00:00:53.60, start: 0.000000, bitrate: 212 kb/s
Stream #0:0: Video: flv1, yuv420p, 140x96, 200 kb/s, 10 tbr, 1k tbn, 1k tbc
Stream #0:1: Audio: mp3, 44100 Hz, stereo, s16, 128 kb/s
How can I do?