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  • FFMPEG in an AWS Lambda will only output 5 seconds of converted video [duplicate]

    5 juin 2021, par beerandsmiles

    I've been looking for a solution for this issue, but I can't seem to find what's going wrong.

    


    In short, I'm using an AWS Lambda to convert video captured from an raspberry pi in a raw .h264 format to .mp4. The problem is that the output file is always, only 5 seconds long.

    


    So I input a video of say 500mb, that is 10 minutes long, and the output is an mp4 that is exactly the first 5 seconds of the source video.

    


    The lambda has been setup following the tutorial from Amazon that is shown here :
https://aws.amazon.com/blogs/media/processing-user-generated-content-using-aws-lambda-and-ffmpeg/

    


    It is triggered by an upload from one s3 buckets, transcodes, and puts it in a different bucket. The purpose is to store a high quality copy of the video that is smaller to save costs. (this is a personal project, so I'm paying personally)

    


    I've put the full code of the lambda down below.
I had trouble using their recommended stdout method as that resulted in a file being created with a size of 0 bytes.

    


    You'll see a few commented lines where I tried different things to solve it. I thought it best to leave that in while asking the questions so you can see what I've done. Firstly the method of using stdout piped directly into the output S3 did not work, so I stored the output file in lambda's /tmp directory.

    


    However, when I first did this using the signed link as the input it gave me 5 seconds of the input video.

    


    Thinking this had to do with an issue in the stream that FFMPEG was getting, I tried instead to download the file from the first S3 bucket into the temp folder, then convert it, and then upload it.

    


    The actual FFMPEG command is quite simple

    


    f"/opt/bin/ffmpeg -framerate 25 -i {s3_source_key} output.mp4"

    


    But this outputs a 5 second video.

    


    I have also tried using different versions of FFMPEG for the layer with lambda and no help. Also, I have set and execution timeout of 2 minutes with 2gb or ram for this lambda.

    


    The last thing, is that running this command on a linux machine, such as a raspberry pi directly, results in an mp4 of the correct length, only in the lambda am I having this problem.

    


    I'm completely lost, and I can't seem to find any documentation on this happening to anyone else.

    


    import os
import subprocess
import shlex
import boto3
from time import sleep

S3_DESTINATION_BUCKET = "dashcam-duncan"
SIGNED_URL_TIMEOUT = 600

def lambda_handler(event, context):
    print(event)
    os.chdir('/tmp')
    s3_source_bucket = event['Records'][0]['s3']['bucket']['name']
    s3_source_key = event['Records'][0]['s3']['object']['key']

    s3_source_basename = os.path.splitext(os.path.basename(s3_source_key))[0]
    s3_destination_filename = s3_source_basename + ".mp4"

    s3_client = boto3.client('s3')
    s3_source_signed_url = s3_client.generate_presigned_url('get_object',
        Params={'Bucket': s3_source_bucket, 'Key': s3_source_key},
        ExpiresIn=SIGNED_URL_TIMEOUT)
    print(s3_source_signed_url)
    s3_client.download_file(s3_source_bucket,s3_source_key,s3_source_key)
    # ffmpeg_cmd = "/opt/bin/ffmpeg -framerate 25 -i \"" + s3_source_signed_url + "\" output.mp4 "
    ffmpeg_cmd = f"/opt/bin/ffmpeg -framerate 25 -i {s3_source_key} output.mp4 "
    # command1 = shlex.split(ffmpeg_cmd)
    # print(command1)
    os.system(ffmpeg_cmd)
    # os.system('ls')
    # p1 = subprocess.run(command1, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    file = 'output.mp4'
    resp = s3_client.put_object(Body=open(file,"rb"), Bucket=S3_DESTINATION_BUCKET, Key=s3_destination_filename)
    # resp = s3_client.put_object(Body=p1.stdout, Bucket=S3_DESTINATION_BUCKET, Key=s3_destination_filename)
    s3 = boto3.resource('s3')
    s3.Object(s3_source_bucket,s3_source_key).delete()
    return {
        'statusCode': 200,
        'body': json.dumps('Processing complete successfully')
    }


    


    The cloudwatch logs on the last execution of this :

    


    built with gcc 8 (Debian 8.3.0-6)&#xA;configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg&#xA;libavutil      56. 70.100 / 56. 70.100&#xA;libavcodec     58.134.100 / 58.134.100&#xA;libavformat    58. 76.100 / 58. 76.100&#xA;libavdevice    58. 13.100 / 58. 13.100&#xA;libavfilter     7.110.100 /  7.110.100&#xA;libswscale      5.  9.100 /  5.  9.100&#xA;libswresample   3.  9.100 /  3.  9.100&#xA;libpostproc    55.  9.100 / 55.  9.100&#xA;Input #0, h264, from &#x27;video00087.h264&#x27;:&#xA;Duration: N/A, bitrate: N/A&#xA;Stream #0:0: Video: h264 (High), yuv420p(progressive), 1280x720, 25 fps, 25 tbr, 1200k tbn, 50 tbc&#xA;Stream mapping:&#xA;Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))&#xA;Press [q] to stop, [?] for help&#xA;[libx264 @ 0x6aaf500] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 0x6aaf500] profile High, level 3.1, 4:2:0, 8-bit&#xA;[libx264 @ 0x6aaf500] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;Output #0, mp4, to &#x27;output.mp4&#x27;:&#xA;Metadata:&#xA;encoder         : Lavf58.76.100&#xA;Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(progressive), 1280x720, q=2-31, 25 fps, 12800 tbn&#xA;Metadata:&#xA;encoder         : Lavc58.134.100 libx264&#xA;Side data:&#xA;cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A&#xA;frame=    1 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;frame=   47 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x    &#xA;frame=   56 fps= 44 q=28.0 size=       0kB time=00:00:00.24 bitrate=   1.6kbits/s speed=0.187x    &#xA;frame=   65 fps= 35 q=28.0 size=       0kB time=00:00:00.60 bitrate=   0.6kbits/s speed=0.325x    &#xA;frame=   74 fps= 31 q=28.0 size=       0kB time=00:00:00.96 bitrate=   0.4kbits/s speed=0.399x    &#xA;Enter command: <target>|all <time>|-1 <command>[ <argument>]&#xA;Parse error, at least 3 arguments were expected, only 1 given in string &#x27;V����Ҿ�#I���bv��oF��LxE��{��y5Jx�X�-f?2k�E~ہ��L��Y?�w���9?S�?�(q?��y��V8�=)�9&#x27;�?�-j?��?�3���Ŧ$��r���\��r}?zb?E��?��B}b4��2��[z�&amp;�逋�Qk�ar�=y���&#x27;&#xA;frame=   82 fps= 28 q=28.0 size=     256kB time=00:00:01.28 bitrate=1638.6kbits/s speed=0.434x    &#xA;frame=   90 fps= 25 q=28.0 size=     256kB time=00:00:01.60 bitrate=1310.9kbits/s speed=0.442x    &#xA;frame=   98 fps= 23 q=28.0 size=     256kB time=00:00:01.92 bitrate=1092.4kbits/s speed=0.458x    &#xA;frame=  107 fps= 23 q=28.0 size=     256kB time=00:00:02.28 bitrate= 919.9kbits/s speed=0.48x    &#xA;frame=  115 fps= 22 q=28.0 size=     512kB time=00:00:02.60 bitrate=1613.3kbits/s speed=0.495x    &#xA;frame=  122 fps= 21 q=28.0 size=     512kB time=00:00:02.88 bitrate=1456.4kbits/s speed=0.499x    &#xA;[h264 @ 0x6b68c80] left block unavailable for requested intra mode&#xA;[h264 @ 0x6b68c80] error while decoding MB 0 19, bytestream 37403&#xA;[h264 @ 0x6b68c80] concealing 2129 DC, 2129 AC, 2129 MV errors in P frame&#xA;video00087.h264: corrupt decoded frame in stream 0&#xA;[h264 @ 0x6ab4080] left block unavailable for requested intra4x4 mode -1&#xA;[h264 @ 0x6ab4080] error while decoding MB 0 37, bytestream 13222&#xA;[h264 @ 0x6ab4080] concealing 689 DC, 689 AC, 689 MV errors in P frame&#xA;video00087.h264: corrupt decoded frame in stream 0&#xA;[h264 @ 0x6b68c80] concealing 1347 DC, 1347 AC, 1347 MV errors in P frame&#xA;frame=  130 fps= 21 q=28.0 size=     512kB time=00:00:03.20 bitrate=1310.8kbits/s speed=0.509x    &#xA;video00087.h264: corrupt decoded frame in stream 0&#xA;frame=  131 fps= 15 q=-1.0 Lsize=    1081kB time=00:00:05.12 bitrate=1729.6kbits/s speed=0.575x    &#xA;video:1079kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.220914%&#xA;[libx264 @ 0x6aaf500] frame I:1     Avg QP:21.61  size: 37761&#xA;[libx264 @ 0x6aaf500] frame P:34    Avg QP:22.25  size: 18066&#xA;[libx264 @ 0x6aaf500] frame B:96    Avg QP:24.46  size:  4706&#xA;[libx264 @ 0x6aaf500] consecutive B-frames:  2.3%  0.0%  0.0% 97.7%&#xA;[libx264 @ 0x6aaf500] mb I  I16..4: 15.2% 61.2% 23.6%&#xA;[libx264 @ 0x6aaf500] mb P  I16..4:  8.4% 15.6%  1.2%  P16..4: 39.2% 13.7%  6.9%  0.0%  0.0%    skip:15.0%&#xA;[libx264 @ 0x6aaf500] mb B  I16..4:  0.7%  1.8%  0.0%  B16..8: 44.5%  4.5%  0.5%  direct: 3.6%  skip:44.4%  L0:46.9% L1:48.0% BI: 5.1%&#xA;[libx264 @ 0x6aaf500] 8x8 transform intra:63.5% inter:83.1%&#xA;[libx264 @ 0x6aaf500] coded y,uvDC,uvAC intra: 22.1% 25.4% 2.8% inter: 11.6% 19.3% 1.2%&#xA;[libx264 @ 0x6aaf500] i16 v,h,dc,p:  4% 63%  8% 25%&#xA;[libx264 @ 0x6aaf500] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu:  9% 26% 53%  1%  2%  1%  3%  1%  3%&#xA;[libx264 @ 0x6aaf500] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 44% 16%  4%  4%  3%  5%  4%  4%&#xA;[libx264 @ 0x6aaf500] i8c dc,h,v,p: 66% 24%  9%  1%&#xA;[libx264 @ 0x6aaf500] Weighted P-Frames: Y:0.0% UV:0.0%&#xA;[libx264 @ 0x6aaf500] ref P L0: 57.5% 16.8% 18.2%  7.5%&#xA;[libx264 @ 0x6aaf500] ref B L0: 89.8%  8.0%  2.2%&#xA;[libx264 @ 0x6aaf500] ref B L1: 96.0%  4.0%&#xA;[libx264 @ 0x6aaf500] kb/s:1685.21&#xA;END RequestId: 96e1031a-b1a2-4480-a59d-68de487671bd&#xA;REPORT RequestId: 96e1031a-b1a2-4480-a59d-68de487671bd  Duration: 11721.77 ms   Billed Duration: 11722 ms   Memory Size: 2048 MB    Max Memory Used: 494 MB Init Duration: 353.14 ms&#xA;</argument></command></time></target>

    &#xA;

    I've been struggling with this for a couple days now, any help would be amazing.

    &#xA;

  • Which release of ffmpeg is used in the book "Understanding FFmpeg with source code : FFMPEG Fundamentals" ?

    28 septembre 2021, par user3344036

    Just bought the book "Understanding FFmpeg with source code : FFMPEG Fundamentals" from Amazon. I have downloaded ffmpeg release 4.4, but the code has been different from that in the book. Just wondering which release the author was using, can anyone help ?

    &#xA;

  • using ffmpeg-lambda on net-core

    19 avril 2022, par user1765862

    I have a amazon lambda function which needs to use ffmpeg library.&#xA;I've found various examples on using ffmpeg lambda layer with nodejs runtime like this one&#xA;https://github.com/serverlesspub/ffmpeg-aws-lambda-layer but I would rather use .net core as runtime for my function instead of nodejs.

    &#xA;

    Any suggestions ?

    &#xA;

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