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Rennes Emotion Map 2010-11
19 octobre 2011, par
Mis à jour : Juillet 2013
Langue : français
Type : Texte
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ffmpeg : Combine/merge multiple mp4 videos not working, output only contains the first video
17 août 2021, par dtbakerHere is the command I am using to combine multiple videos :



ffmpeg -i 75_540_38HQ2.mp4 -i 76_70_20.mp4 -i 76_173_80.mp4 -i 81_186_35.mp4 -vcodec copy -acodec copy Mux1.mp4



The resulting
Mux1.mp4does not contain all videos. Only the first video (75_540_38HQ2.mp4). The file size of the source and resulting video is below (as you can see, resulting video is slightly larger than first vid) :



$ ls -lh
-rw-r—r— 1 dbaker dbaker 42M 2011-03-24 11:59 75_540_38HQ2.mp4
-rw-r—r— 1 dbaker dbaker 236M 2011-03-24 12:09 76_173_80.mp4
-rw-r—r— 1 dbaker dbaker 26M 2011-03-24 12:05 76_70_20.mp4
-rw-r—r— 1 dbaker dbaker 54M 2011-03-24 12:15 81_186_35.mp4
-rw-r—r— 1 dbaker dbaker 44M 2011-03-24 14:48 Mux1.mp4




Here is the output of the
ffmpegcommand. To me it looks ok, showing the multiple source inputs and the single output.



FFmpeg version SVN-r26402, Copyright (c) 2000-2011 the FFmpeg developers
 built on Mar 21 2011 18:05:32 with gcc 4.4.5
 configuration : —enable-gpl —enable-version3 —enable-nonfree —enable-postproc —enable-libfaac —enable-libmp3lame —enable-libopencore-amrnb —enable-libopencore-amrwb —enable-libtheora —enable-libvorbis —enable-libvpx —enable-libx264 —enable-libxvid —enable-x11grab
 libavutil 50.36. 0 / 50.36. 0
 libavcore 0.16. 1 / 0.16. 1
 libavcodec 52.108. 0 / 52.108. 0
 libavformat 52.93. 0 / 52.93. 0
 libavdevice 52. 2. 3 / 52. 2. 3
 libavfilter 1.74. 0 / 1.74. 0
 libswscale 0.12. 0 / 0.12. 0
 libpostproc 51. 2. 0 / 51. 2. 0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '75_540_38HQ2.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf52.93.0
 Duration : 00:00:29.99, start : 0.000000, bitrate : 11517 kb/s
 Stream #0.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 11575 kb/s, 29.94 fps, 29.97 tbr, 30k tbn, 59.94 tbc
 Metadata :
 creation_time : 1970-01-01 00:00:00
 Stream #0.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 127 kb/s
 Metadata :
 creation_time : 1970-01-01 00:00:00
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from '76_70_20.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf52.93.0
 Duration : 00:00:19.98, start : 0.000000, bitrate : 10901 kb/s
 Stream #1.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10804 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc
 Metadata :
 creation_time : 1970-01-01 00:00:00
 Stream #1.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
 Metadata :
 creation_time : 1970-01-01 00:00:00
Input #2, mov,mp4,m4a,3gp,3g2,mj2, from '76_173_80.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf52.93.0
 Duration : 00:03:09.99, start : 0.000000, bitrate : 10393 kb/s
 Stream #2.0(eng) : Video : h264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], 10321 kb/s, 29.96 fps, 29.97 tbr, 30k tbn, 59.94 tbc
 Metadata :
 creation_time : 1970-01-01 00:00:00
 Stream #2.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
 Metadata :
 creation_time : 1970-01-01 00:00:00

Seems stream 0 codec frame rate differs from container frame rate : 119.88 (120000/1001) -> 30000.00 (30000/1)
Input #3, mov,mp4,m4a,3gp,3g2,mj2, from '81_186_35.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf52.93.0
 Duration : 00:00:35.00, start : 0.000000, bitrate : 12700 kb/s
 Stream #3.0(eng) : Video : h264, yuv420p, 1280x720 [PAR 1:1 DAR 16:9], 12620 kb/s, 59.91 fps, 30k tbr, 60k tbn, 119.88 tbc
 Metadata :
 creation_time : 1970-01-01 00:00:00
 Stream #3.1(eng) : Audio : aac, 48000 Hz, stereo, s16, 128 kb/s
 Metadata :
 creation_time : 1970-01-01 00:00:00
Output #0, mp4, to 'Mux1.mp4' :
 Metadata :
 major_brand : isom
 minor_version : 512
 compatible_brands : isomiso2avc1mp41
 creation_time : 1970-01-01 00:00:00
 encoder : Lavf52.93.0
 Stream #0.0(eng) : Video : libx264, yuv420p, 1280x960 [PAR 1:1 DAR 4:3], q=2-31, 11575 kb/s, 30k tbn, 29.97 tbc
 Metadata :
 creation_time : 1970-01-01 00:00:00
 Stream #0.1(eng) : Audio : libfaac, 48000 Hz, stereo, 128 kb/s
 Metadata :
 creation_time : 1970-01-01 00:00:00
Stream mapping :
 Stream #0.0 -> #0.0
 Stream #2.1 -> #0.1
Press [q] to stop encoding
frame= 883 fps=632 q=-1.0 Lsize= 44730kB time=29.40 bitrate=12465.1kbits/s 
video:41678kB audio:2969kB global headers:0kB muxing overhead 0.184548%




Am I doing something blindingly stupid here ?



The source videos came from a video camera, and are small snippets taken with
ffmpeg -i bigfile.mp4 -ss 20 -t 10 -vcodec copy etc..


Thanks heaps !!
Dave





Edit : couldn't solve it so I just use avidemux GUI tool. It seemed to append the MP4's just fine.



Must be a problem with MP4's or just the ones that come off a gopro camera.


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How to use Google's Cloud Speech-to-Text REST API to transcribe a video
24 juillet 2018, par mrbI’d like to have the transcript of 2 people speaking in a video, but I get an empty response from the Cloud Speech-to-Text API
Approach :
I have a 56 minute video file containing a conversation between two people. I would like to have the transcript of that conversation, and I would like to use Google’s Cloud Speech-to-Text API to get that.
To save a little on my Google Cloud Storage I converted to video to audio first by using
mmpeg.First I’d tried to figure out the audio codec by using the command below, and it looks like AAC.
ffmpeg -i video.mp4Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videoplayback.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-12-30T08:17:14.000000Z
Duration: 00:56:03.99, start: 0.000000, bitrate: 362 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 490x360 [SAR 1:1 DAR 49:36], 264 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96 kb/s (default)
Metadata:
creation_time : 2015-12-30T08:17:31.000000Z
handler_name : IsoMedia File Produced by Google, 5-11-2011So I took that from the video by using :
ffmpeg -i video.mp4 -vn -acodec copy myaudio.aacDetails so far :
ffmpeg -i myaudio.aac
Outputs :Input #0, aac, from 'myaudio.aac':
Duration: 00:56:47.49, bitrate: 97 kb/s
Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 97 kb/sAfter that I converted it to opus because I’m told that opus is better
ffmpeg -i myaudio.aac -acodec libopus -b:a 97k -vbr on -compression_level 10 myaudio.opusInfo so far :
opusinfo myaudio.opusUser comments section follows...
encoder=Lavc58.18.100 libopus
Opus stream 1:
Pre-skip: 312
Playback gain: 0 dB
Channels: 2
Original sample rate: 48000Hz
Packet duration: 20.0ms (max), 20.0ms (avg), 20.0ms (min)
Page duration: 1000.0ms (max), 1000.0ms (avg), 1000.0ms (min)
Total data length: 29956714 bytes (overhead: 0.872%)
Playback length: 56m:03.990s
Average bitrate: 71.24 kb/s, w/o overhead: 70.62 kb/sI this point I uploaded the
myaudio.opusto the Google Cloud Storage.curl POST 1
I started the speech recognition by doing a POST withcurl:curl --request POST --header "Content-Type: application/json" --url 'https://speech.googleapis.com/v1/speech:longrunningrecognize?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}' --data '{"audio": {"uri": "gs://{MY_BUCKET}/myaudio.opus"},"config": {"encoding": "OGG_OPUS", "sampleRateHertz": 48000, "languageCode": "en-US"}}'Response :
{"name": "123456789"}
123456789 was not the actual value.curl GET 1
Now I wanted to have the results :curl --request GET --url 'https://speech.googleapis.com/v1/operations/123456789?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}'This gave me the error :
Error : Unable to recognize speech, possible error in encoding or channel config. Please correct the config and retry the request.So I updated the encoding configuration from
OGG_OPUStoLINEAR16.curl POST 2
Did the post again :curl --request POST --header "Content-Type: application/json" --url 'https://speech.googleapis.com/v1/speech:longrunningrecognize?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}' --data '{"audio": {"uri": "gs://{MY_BUCKET}/myaudio.opus"},"config": {"encoding": "LINEAR16", "sampleRateHertz": 48000, "languageCode": "en-US"}}'Response :
{"name": "987654321"}curl GET 2
curl --request GET --url 'https://speech.googleapis.com/v1/operations/987654321?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}'Response :
{
"name": "987654321",
"metadata": {
"@type": "type.googleapis.com/google.cloud.speech.v1.LongRunningRecognizeMetadata",
"progressPercent": 100,
"startTime": "2018-06-08T11:01:24.596504Z",
"lastUpdateTime": "2018-06-08T11:01:51.825882Z"
},
"done": true
}The problem is that I don’t get the actual transcription. According the the documentation there should be a
responsekey in the response containing the data.Since I’m kinda stuck here I’d like to know if I’m doing something completely wrong. I don’t have any technical or resource limitation so all suggestions are very welcome ! Also happy to change my approach.
Thanks in advance ! Cheers
-
How to use Google's Cloud Speech-to-Text API to transcribe a video using the REST API
8 juin 2018, par mrbI’d like to have the transcript of 2 people speaking in a video, but I get an empty response from the Cloud Speech-to-Text API
Approach :
I have a 56 minute video file containing a conversation between two people. I would like to have the transcript of that conversation, and I would like to use Google’s Cloud Speech-to-Text API to get that.
To save a little on my Google Cloud Storage I converted to video to audio first by using
mmpeg.First I’d tried to figure out the audio codec by using the command below, and it looks like AAC.
ffmpeg -i video.mp4Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'videoplayback.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2015-12-30T08:17:14.000000Z
Duration: 00:56:03.99, start: 0.000000, bitrate: 362 kb/s
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 490x360 [SAR 1:1 DAR 49:36], 264 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default)
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 96 kb/s (default)
Metadata:
creation_time : 2015-12-30T08:17:31.000000Z
handler_name : IsoMedia File Produced by Google, 5-11-2011So I took that from the video by using :
ffmpeg -i video.mp4 -vn -acodec copy myaudio.aacDetails so far :
ffmpeg -i myaudio.aac
Outputs :Input #0, aac, from 'myaudio.aac':
Duration: 00:56:47.49, bitrate: 97 kb/s
Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 97 kb/sAfter that I converted it to opus because I’m told that opus is better
ffmpeg -i myaudio.aac -acodec libopus -b:a 97k -vbr on -compression_level 10 myaudio.opusInfo so far :
opusinfo myaudio.opusUser comments section follows...
encoder=Lavc58.18.100 libopus
Opus stream 1:
Pre-skip: 312
Playback gain: 0 dB
Channels: 2
Original sample rate: 48000Hz
Packet duration: 20.0ms (max), 20.0ms (avg), 20.0ms (min)
Page duration: 1000.0ms (max), 1000.0ms (avg), 1000.0ms (min)
Total data length: 29956714 bytes (overhead: 0.872%)
Playback length: 56m:03.990s
Average bitrate: 71.24 kb/s, w/o overhead: 70.62 kb/sI this point I uploaded the
myaudio.opusto the Google Cloud Storage.curl POST 1
I started the speech recognition by doing a POST withcurl:curl --request POST --header "Content-Type: application/json" --url 'https://speech.googleapis.com/v1/speech:longrunningrecognize?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}' --data '{"audio": {"uri": "gs://{MY_BUCKET}/myaudio.opus"},"config": {"encoding": "OGG_OPUS", "sampleRateHertz": 48000, "languageCode": "en-US"}}'Response :
{"name": "123456789"}
123456789 was not the actual value.curl GET 1
Now I wanted to have the results :curl --request GET --url 'https://speech.googleapis.com/v1/operations/123456789?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}'This gave me the error :
Error : Unable to recognize speech, possible error in encoding or channel config. Please correct the config and retry the request.So I updated the encoding configuration from
OGG_OPUStoLINEAR16.curl POST 2
Did the post again :curl --request POST --header "Content-Type: application/json" --url 'https://speech.googleapis.com/v1/speech:longrunningrecognize?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}' --data '{"audio": {"uri": "gs://{MY_BUCKET}/myaudio.opus"},"config": {"encoding": "LINEAR16", "sampleRateHertz": 48000, "languageCode": "en-US"}}'Response :
{"name": "987654321"}curl GET 2
curl --request GET --url 'https://speech.googleapis.com/v1/operations/987654321?fields=done%2Cerror%2Cmetadata%2Cname%2Cresponse&key={MY_API_KEY}'Response :
{
"name": "987654321",
"metadata": {
"@type": "type.googleapis.com/google.cloud.speech.v1.LongRunningRecognizeMetadata",
"progressPercent": 100,
"startTime": "2018-06-08T11:01:24.596504Z",
"lastUpdateTime": "2018-06-08T11:01:51.825882Z"
},
"done": true
}The problem is that I don’t get the actual transcription. According the the documentation there should be a
responsekey in the response containing the data.Since I’m kinda stuck here I’d like to know if I’m doing something completely wrong. I don’t have any technical or resource limitation so all suggestions are very welcome ! Also happy to change my approach.
Thanks in advance ! Cheers
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