[FFmpeg-user] ffmpeg stream copy does NOT set AV_PKT_FLAG_KEY when input_format h264
Soho Soho123
soho123.2012 at gmail.com
Wed Mar 27 02:46:04 CET 2013
Hi Carl,
Do you have ideas about the issue that I mentioned below?
Thanks!
2013/3/26 Soho Soho123 <soho123.2012 at gmail.com>:
> Hi,
>
> Do you have idea about:
> Why ffmpeg does not set AV_PKT_FLAG_KEY when h264 stream copy?
> Does ffmpeg parse video data that get from webcam when DQBuffer?
> when input_format is YUV, ffmpeg will set AV_PKT_FLAG_KEY,
> It is confused why input format is h264 will not.
>
> 2013/3/25 Soho Soho123 <soho123.2012 at gmail.com>:
>>> Then please provide the complete, uncut console output
>>> for the following command so I have at least a chance
>>> to help you:
>>> $ ffmpeg -f video4linux2 -r 10 -s 640x480 -input_format h264
>>> -i /dev/video1 -vcodec copy out.h264
>>
>> It seems the output file format is NOT key issue,
>> do you have any ideas?
>>
>> the log of the commandline you mentioned:
>>
>> # ffserver -f /etc/ffserver.conf &
>> # ffserver version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
>> built on Mar 21 2013 14:21:02 with gcc 4.4.5-1.5.5p4 (GCC)
>> configuration: --enable-cross-compile --cross-prefix=sdk-linux-
>> --arch=mips --target-os=linux --disable
>> -doc --disable-htmlpages --disable-manpages --disable-podpages
>> --disable-txtpages --disable-mips32r2 --dis
>> able-ffplay --disable-postproc --disable-runtime-cpudetect
>> --disable-swscale-alpha --disable-mipsdspr1 --d
>> isable-mipsdspr2 --disable-mipsfpu --enable-small
>> --prefix=/ffmpeg/romfs --bindir=/ffmpeg/romfs --disable-bsfs
>> --disable-filters --enable-gpl --enable-libx264 --extra-c
>> flags=-I/lib/crosslib/include --extra-libs='-L/lib/crosslib/lib
>> -lx264' --enable-filter='aformat,aresample
>> ,copy,format,fps,framestep,resample' --disable-encoders
>> --enable-encoder='h264,libx264,libx264rgb' --enabl
>> e-encoder=yuv4 --enable-encoder=mjpeg --disable-decoders
>> --enable-decoder=mjpeg --enable-decoder=h264 --en
>> able-decoder=mpegvideo --enable-decoder=mpeg2video --enable-decoder=y
>> libavutil 52. 18.100 / 52. 18.
>> 100
>> libavcodec 54. 92.100 / 54. 92.100
>> libavformat 54. 63.104 / 54. 63.104
>> libavdevice 54. 3.103 / 54. 3.103
>> libavfilter 3. 42.103 / 3. 42.103
>> libswscale 2. 2.100 / 2. 2.100
>> libswresample 0. 17.102 / 0. 17.102
>> Mon Mar 25 10:39:46 2013 FFserver started.
>> #
>> #
>> #
>> #
>> # ffmpeg -loglevel debug -f video4linux2 -r 10 -s 640x480 -input_format h264 -i
>> /dev/video1 -vcodec copy /var/tmp/out.h264
>> ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
>> built on Mar 21 2013 14:21:02 with gcc 4.4.5-1.5.5p4 (GCC)
>> configuration: --enable-cross-compile --cross-prefix=sdk-linux-
>> --arch=mips --target-os=linux --disable
>> -doc --disable-htmlpages --disable-manpages --disable-podpages
>> --disable-txtpages --disable-mips32r2 --dis
>> able-ffplay --disable-postproc --disable-runtime-cpudetect
>> --disable-swscale-aSetting frame interval to 1/
>> 10 (1000000).
>> lUsing frame interval 100000.0 us (10.0 fps).
>> pha --disable-mipsdspr1 --disable-mipsdspr2 --disable-mipsfpu
>> --enable-small --prefix=/ffmpeg/romfs --bindir=/ffmpeg/romfs
>> --disable-bsfs --disable-filters --enable-gpl
>> --enable-libx264 --extra-cflags=-I/lib/crosslib/include
>> --extra-libs='-L/lib/crosslib/lib -lx264' --enabl
>> e-filter='aformat,aresample,copy,format,fps,framestep,resample'
>> --disable-encoders --enable-encoder='h264,
>> libx264,libx264rgb' --enable-encoder=yuv4 --enable-encoder=mjpeg
>> --disable-decoders --enable-decoder=mjpeg
>> --enable-decoder=h264 --enable-decoder=mpegvideo
>> --enable-decoder=mpeg2video --enable-decoder=y libavuti
>> l 52. 18.100 / 52. 18.100
>> libavcodec 54. 92.100 / 54. 92.100
>> libavformat 54. 63.104 / 54. 63.104
>> libavdevice 54. 3.103 / 54. 3.103
>> libavfilter 3. 42.103 / 3. 42.103
>> libswscale 2. 2.100 / 2. 2.100
>> libswresample 0. 17.102 / 0. 17.102
>> Splitting the commandline.
>> Reading option '-loglevel' ... matched as option 'loglevel' (set
>> libav* logging level) with argument 'debug'.
>> Reading option '-f' ... matched as option 'f' (force format) with
>> argument 'video4linux2'.
>> Reading option '-r' ... matched as option 'r' (set frame rate (Hz
>> value, fraction or abbreviation)) with argument '10'.
>> Reading option '-s' ... matched as option 's' (set frame size (WxH or
>> abbreviation)) with argument '640x480'.
>> Reading option '-input_format' ... matched as AVOption 'input_format'
>> with argument 'h264'.
>> Reading option '-i' ... matched as input file with argument '/dev/video1'.
>> Reading option '-vcodec' ... matched as option 'vcodec' (force video
>> codec ('copy' to copy stream)) with argument 'copy'.
>> Reading option '/var/tmp/out.h264' ... matched as output file.
>> Finished splitting the commandline.
>> Parsing a group of options: global .
>> Applying option loglevel (set libav* logging level) with argument debug.
>> Successfully parsed a group of options.
>> Parsing a group of options: input file /dev/video1.
>> Applying option f (force format) with argument video4linux2.
>> Applying option r (set frame rate (Hz value, fraction or
>> abbreviation)) with argument 10.
>> Applying option s (set frame size (WxH or abbreviation)) with argument 640x480.
>> Successfully parsed a group of options.
>> Opening an input file: /dev/video1.
>> [video4linux2,v4l2 @ 0x69e660] fd:3 capabilities:4000001
>> [video4linux2,v4l2 @ 0x69e660] Selecting input_channel: 0
>> [video4linux2,v4l2 @ 0x69e660] input_channel: 0, input_name: Camera 1
>> [video4linux2,v4l2 @ 0x69e660] Setting time per frame to 1/10
>> [video4linux2,v4l2 @ 0x69e660] End of v4l2_read_header
>> [h264 @ 0x69f190] Using externally provided dimensions
>> [video4linux2,v4l2 @ 0x69e660] All info found
>> [video4linux2,v4l2 @ 0x69e660] Estimating duration from bitrate, this
>> may be inaccurate
>> Input #0, video4linux2,v4l2, from '/dev/video1':
>> Duration: N/A, start: 71.100000, bitrate: N/A
>> Stream #0:0, 8, 1/1000000: Video: h264, yuv420p, 640x480,
>> 1/2000000, -1 kb/s, 10 fps, 10 tbr, 1000k tb
>> n, 2000k tbc
>> Successfully opened the file.
>> Parsing a group of options: output file /var/tmp/out.h264.
>> Applying option vcodec (force video codec ('copy' to copy stream))
>> with argument copy.
>> Successfully parsed a group of options.
>> Opening an output file: /var/tmp/out.h264.
>> Successfully opened the file.
>> Output #0, h264, to '/var/tmp/out.h264':
>> Metadata:
>> encoder : Lavf54.63.104
>> Stream #0:0, 0, 1/90000: Video: h264, yuv420p, 640x480, 1/1000000,
>> q=2-31, -1 kb/s, 10 fps, 90k tbn, 1
>> 000k tbc
>> Stream mapping:
>> Stream #0:0 -> #0:0 (copy)
>> Press [q] to stop, [?] for help
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 size= 0kB time=00:00:00.00 bitrate=N/A
>> frame= 0 fps=0.0 q=-1.0 Lsize= 0kB time=00:00:00.00 bitrate=N/A
>> video:0kB audio:0kB subtitle:0 global headers:0kB muxing overhead nan%
>> Output file is empty, nothing was encoded (check -ss / -t / -frames
>> parameters if used)
>> # ls /var/tmp -al
>> drwxr-xr-x 3 root root 0 Mar 25 10:40 .
>> drwxr-xr-x 20 root root 0 Mar 25 10:39 ..
>> -rw-r--r-- 1 root root 4096 Mar 25 10:39 feed1.ffm
>> -rw-r--r-- 1 root root 0 Mar 25 10:40 out.h264
>> #
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