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FFmpeg h264_v4l2m2m to rtmp
6 juillet 2021, par KnightRexOn an up to date Raspberry Pi 4 B+ 4GB with the Raspberry OS 32bit I'm attempting to stream to an rtmp service, like Youtube or Twitch with FFmpeg using the hardware encoder h264_v4l2m2m but it fails.


Issue


When streaming the streaming service it ingests the input, bitrate and goes live but no output is shown. When connecting to Twitch the stream inspector correctly detects video resolution but fails to detect the codec or fps.


When I replace the stream output to for example a file, test.flv, it records a viewable video with the correct codec (h264/aac) codecs in vlc and ffplay.


When I replace the h264_v4l2m2m encoder with h264_omx it streams the video correctly.


Steps


- 

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Installed a clean version of the latest Raspi OS 32bit


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Recompiled FFmpeg to 4.3.2 (to the solve green screen)


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Record video, creates viewable video :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-t 15 test.flv


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Start stream, unable to view :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-f flv "<destination uri="uri">"
</destination>

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Start stream, unable to view (Extended based on comments below) :


ffmpeg \
 -re -f lavfi -i anullsrc \
 -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
 -c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 \
 -c:a aac \
 -f flv "<destination uri="uri">"
</destination>

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Start stream, with omx works :


ffmpeg \
-f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 \
-c:v h264_omx -preset ultrafast -pix_fmt yuv420p -g 60 -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -an \
-f flv "<destination uri="uri">"
</destination>















Output


With h264_v4l2m2m (invalid output - loglevel verbose) :


$ ffmpeg -re -f lavfi -i anullsrc -f v4l2 -input_format mjpeg -video_size 1280x720 -framerate 30 -i /dev/video0 -c:v h264_v4l2m2m -g 60 -pix_fmt yuv420p -b:v 3000k -minrate 3000k -maxrate 3000k -r 30 -c:a aac -f flv <destination url="url">
ffmpeg version n4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
 built with gcc 8 (Raspbian 8.3.0-6+rpi1)
 configuration: --prefix=/home/pi/ffmpeg_build --bindir=/home/pi/bin --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/lib --extra-libs='-lpthread -lm -latomic' --enable-omx --enable-encoder=h264_omx
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
[Parsed_anullsrc_0 @ 0x7215c0] sample_rate:44100 channel_layout:'stereo' nb_samples:1024
Input #0, lavfi, from 'anullsrc':
 Duration: N/A, start: 0.000000, bitrate: 705 kb/s
 Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
[video4linux2,v4l2 @ 0x725350] fd:3 capabilities:84a00001
[mjpeg @ 0x1e10210] EOI missing, emulating
Input #1, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 42396.344658, bitrate: N/A
 Stream #1:0: Video: mjpeg (Baseline), yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
[tcp @ 0x72cac0] Starting connection attempt to <destination ip="ip"> port 1935
[tcp @ 0x72cac0] Successfully connected to <destination ip="ip"> port 1935
Stream mapping:
 Stream #1:0 -> #0:0 (mjpeg (native) -> h264 (h264_v4l2m2m))
 Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[graph 0 input from stream 1:0 @ 0x73de00] w:1280 h:720 pixfmt:yuvj422p tb:1/1000000 fr:30/1 sar:0/1 sws_param:flags=2
[auto_scaler_0 @ 0x745400] w:iw h:ih flags:'bicubic' interl:0
[format @ 0x73e750] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'format'
[swscaler @ 0x1e300b0] deprecated pixel format used, make sure you did set range correctly
[auto_scaler_0 @ 0x745400] w:1280 h:720 fmt:yuvj422p sar:0/1 -> w:1280 h:720 fmt:yuv420p sar:0/1 flags:0x4
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-isp'
[h264_v4l2m2m @ 0x72a500] driver 'uvcvideo' on card 'USB Video: USB Video'
 Last message repeated 1 times
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-encode'
[h264_v4l2m2m @ 0x72a500] Using device /dev/video11
[h264_v4l2m2m @ 0x72a500] driver 'bcm2835-codec' on card 'bcm2835-codec-encode'
[h264_v4l2m2m @ 0x72a500] Failed to set number of B-frames
 Last message repeated 1 times
[h264_v4l2m2m @ 0x72a500] Failed to set gop size
[h264_v4l2m2m @ 0x72a500] h264 profile not found
[h264_v4l2m2m @ 0x72a500] Encoder adjusted: qmin (0), qmax (51)
[h264_v4l2m2m @ 0x72a500] Failed to set minimum video quantizer scale
[h264_v4l2m2m @ 0x72a500] Failed to set maximum video quantizer scale
[graph_1_in_0_0 @ 0x786f90] tb:1/44100 samplefmt:u8 samplerate:44100 chlayout:0x3
[format_out_0_1 @ 0x7871d0] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'
[auto_resampler_0 @ 0x7887f0] ch:2 chl:stereo fmt:u8 r:44100Hz -> ch:2 chl:stereo fmt:fltp r:44100Hz
Output #0, flv, to '<destination url="url">':
 Metadata:
 encoder : Lavf58.45.100
 Stream #0:0: Video: h264 (h264_v4l2m2m) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=-1--1, 3000 kb/s, 30 fps, 1k tbn, 30 tbc
 Metadata:
 encoder : Lavc58.91.100 h264_v4l2m2m
 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.91.100 aac
[video4linux2,v4l2 @ 0x1e0f410] Thread message queue blocking; consider raising the thread_queue_size option (current value: 8)
frame= 1966 fps= 24 q=-0.0 size= 13016kB time=00:01:23.60 bitrate=1275.4kbits/s speed= 1x
</destination></destination></destination></destination>

- 

- deprecated pixel format yuvy422p : video0 has mjpeg and raw output in pixel format yuvy422p.




With h264 omx (works)


libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
Input #0, lavfi, from 'anullsrc':
 Duration: N/A, start: 0.000000, bitrate: 705 kb/s
 Stream #0:0: Audio: pcm_u8, 44100 Hz, stereo, u8, 705 kb/s
[mjpeg @ 0x7c7320] EOI missing, emulating
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 71.378330, bitrate: N/A
 Stream #0:0: Video: mjpeg, yuvj422p(pc, bt470bg/unknown/unknown), 1280x720, 30 fps, 30 tbr, 1000k tbn, 1000k tbc
Codec AVOption preset (Configuration preset) specified for output file #0 (<destination url="url">) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
 Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (h264_omx))
 Stream #0:0 -> #0:1 (pcm_u8 (native) -> aac (native))
Press [q] to stop, [?] for help
[swscaler @ 0x7e5180] deprecated pixel format used, make sure you did set range correctly
[h264_omx @ 0x7cb800] Using OMX.broadcom.video_encode
Output #0, flv, to '<destination url="url">':
 Metadata:
 encoder : Lavf58.20.100
 Stream #0:0: Video: h264 (h264_omx) ([7][0][0][0] / 0x0007), yuv420p(progressive), 1280x720, q=2-31, 3000 kb/s, 30 fps, 1k tbn, 30 tbc
 Metadata:
 encoder : Lavc58.35.100 h264_omx
 Stream #0:1: Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, stereo, fltp, 128 kb/s
 Metadata:
 encoder : Lavc58.35.100 aac
[flv @ 0x7ca190] Failed to update header with correct duration.rate=1438.3kbits/s speed= 1x
[flv @ 0x7ca190] Failed to update header with correct filesize.
frame= 2190 fps= 24 q=-0.0 Lsize= 16424kB time=00:01:33.20 bitrate=1443.6kbits/s speed= 1x
</destination></destination>

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Alternative to ffmpeg for dynamically creating video thumbnails [closed]
4 juillet 2021, par Daniel RusevThe server hosting my website doesn't have ffmpeg and I am not allowed to install any additional extensions. Is there any other way I can make video thumbnails dynamically ? Perhaps some kind of web service, where I pass the video file and as a result I get a picture file. I'm using php, by the way.


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How to append datetime to ffmpeg log
30 juin 2021, par verbI wonder if there is a way to prefix every record in my ffmpeg log with date and time. I would like to add at least time when the record has been written. Part of my log :


[mpegts @ 0x5e11d40] [verbose] service 1 using PCR in pid=256, pcr_period=20ms
[mpegts @ 0x5e11d40] [verbose] muxrate 16000000, sdt every 500 ms, pat/pmt every 100 ms 


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