Carl Eugen Hoyos writes:
Thomas Seilund <tps <at> netmaster.dk> writes:
--enable-x11grab
Completely unrelated:
--enable-x11grab is not necessary anymore, the new
xcb input device is auto-detected by configure.
return AVPROBE_SCORE_EXTENSION / 2 + 1;
This corresponds to "return 26;" (I think).
Could you test if a lower value than 26 helps?
(You could first test 0, then 13 and so on...)
I did do make and make install
I should add that I absolutely never install:
At least for this test, you can run ./ffmpeg
from the build directory.
Thank you!
Carl Eugen
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Hi Carl
Thanks for the advice.
It works fine when "static int v4l2_read_probe(AVProbeData *p)" returns 0
tps@t420:~/data/data/ffmpeg$ ./ffmpeg -y -i /dev/video1 -c copy -f mpegts
ffmpeg.ts
ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg
developers
built on Jan 26 2015 18:39:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable-
libx264 --enable-version3 --enable-libvorbis --enable-libfreetype --enable-
libv4l2 --enable-libfdk-aac --enable-nonfree
libavutil 54. 17.100 / 54. 17.100
libavcodec 56. 20.100 / 56. 20.100
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 8.101 / 5. 8.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mpegts, from '/dev/video1':
Duration: N/A, start: 0.390367, bitrate: N/A
Program 1
Stream #0:0[0x1011]: Video: h264 (Main) (HDMV / 0x564D4448),
yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn,
100 tbc
Stream #0:1[0x1100]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000
Hz, stereo, fltp, 130 kb/s
Output #0, mpegts, to 'ffmpeg.ts':
Metadata:
encoder : Lavf56.19.100
Stream #0:0: Video: h264 (HDMV / 0x564D4448), yuv420p, 1280x720 [SAR
1:1 DAR 16:9], q=2-31, 50 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, 130
kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 492 fps=101 q=-1.0 Lsize= 8784kB time=00:00:09.89
bitrate=7269.4kbits/s
video:7927kB audio:158kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 8.646630%
tps@t420:~/data/data/ffmpeg$
It works fine when "static int v4l2_read_probe(AVProbeData *p)" returns 13
tps@t420:~/data/data/ffmpeg$ ./ffmpeg -y -i /dev/video1 -c copy -f mpegts
ffmpeg.ts
ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg
developers
built on Jan 26 2015 18:39:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable-
libx264 --enable-version3 --enable-libvorbis --enable-libfreetype --enable-
libv4l2 --enable-libfdk-aac --enable-nonfree
libavutil 54. 17.100 / 54. 17.100
libavcodec 56. 20.100 / 56. 20.100
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 8.101 / 5. 8.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Input #0, mpegts, from '/dev/video1':
Duration: N/A, start: 0.390367, bitrate: N/A
Program 1
Stream #0:0[0x1011]: Video: h264 (Main) (HDMV / 0x564D4448),
yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn,
100 tbc
Stream #0:1[0x1100]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000
Hz, stereo, fltp, 126 kb/s
Output #0, mpegts, to 'ffmpeg.ts':
Metadata:
encoder : Lavf56.19.100
Stream #0:0: Video: h264 (HDMV / 0x564D4448), yuv420p, 1280x720 [SAR
1:1 DAR 16:9], q=2-31, 50 fps, 50 tbr, 90k tbn, 50 tbc
Stream #0:1: Audio: aac ([15][0][0][0] / 0x000F), 48000 Hz, stereo, 126
kb/s
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 1071 fps= 65 q=-1.0 Lsize= 18975kB time=00:00:21.44
bitrate=7250.1kbits/s
video:17123kB audio:342kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 8.648141%
tps@t420:~/data/data/ffmpeg$
For the sake of the test I try to let "static int
v4l2_read_probe(AVProbeData *p)" return 26 and now if fails
tps@t420:~/data/data/ffmpeg$ ./ffmpeg -y -i /dev/video1 -c copy -f mpegts
ffmpeg.ts
ffmpeg version N-69238-g2699a37 Copyright (c) 2000-2015 the FFmpeg
developers
built on Jan 26 2015 18:39:06 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
configuration: --enable-gpl --enable-libmp3lame --enable-libvpx --enable-
libx264 --enable-version3 --enable-libvorbis --enable-libfreetype --enable-
libv4l2 --enable-libfdk-aac --enable-nonfree
libavutil 54. 17.100 / 54. 17.100
libavcodec 56. 20.100 / 56. 20.100
libavformat 56. 19.100 / 56. 19.100
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 8.101 / 5. 8.101
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
[video4linux2,v4l2 @ 0x31110e0] The device does not support the streaming
I/O method.
/dev/video1: Function not implemented
tps@t420:~/data/data/ffmpeg$
Thanks
Thomas S
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