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How to open AVCodec ?

28 novembre 2014, par Anton Kasabutski

I'm tired of searching the solution about this theme. Can anybody help?

Types:

AVOutputFormat* m_outFormat;
AVFormatContext* m_formatContext;
AVCodecContext* m_videoCodecContext;
AVCodec* m_videoCodec;

Code:

avcodec_register_all();
av_register_all();
m_outFormat = av_guess_format(NULL,filePath().toUtf8().constData(),NULL);
//filePath ended like ".mp4"
if (!m_outFormat)
    return; //all is fine
avformat_alloc_output_context2(&m_formatContext,NULL,NULL,filePath().toUtf8().constData());
m_formatContext->oformat->video_id = CODEC_ID_H264;
m_outFormat=m_formatContext->oformat;
////////////////////////////////////////////////////////////////////
m_videoCodec=avcodec_find_encoder(CODEC_ID_H264);
m_videoStream = avformat_new_stream(m_formatContext,m_videoCodec);
if (m_videoStream)
    return; //all is fine
m_videoCodecContext = avcodec_alloc_context3(m_videoCodec);
m_videoCodecContext->codec_id = CODEC_ID_H264;
m_videoCodecContext->width = 1280;
m_videoCodecContext->height = 720;
m_videoCodecContext->codec_type = AVMEDIA_TYPE_VIDEO;
m_videoCodecContext->pix_fmt = PIX_FMT_YUV420P;
av_codec_open2(M_videoCodecContext,m_videoCodec,NULL);

I'm getting an error:

[libx264 @.....] Codec type or id mismathes.

av_codec_open2(..) returned (-22 error). Where I did mistake?More info:

last ffmpeg
Mac Os x 10.10
libx264 installed
after av_guess_format(...) I've got audio_codec = CODEC_ID_H264, video_codec = CODEC_ID_NONE, long_name MP4(MPEG-4 Part 14) in m_outFormat.
after avformat_alloc_context3(...) I've got audio_codec_id = video_codec_id = CODEC_ID_NONE in m_formatContext.
after avcodec_find_encoder(CODEC_ID_H264) I've got name = "libx264", id = CODEC_ID_MPEG1VIDEO in m_videoCodec.
I can share more info if You can say, what do You exactly need.

how to use x264 encoder with directshow

14 octobre 2014, par habibhassani

i can't figure out how to use x264 with directshow. i installed many thinks that pretend to have x264 encoder in with no use i downloaded the videoLAN x264 binary and when i run it, it shows so fast a console windows, and nothing happen after that

these is the encoders that i have

i am working on windows 8.1 x64

please help with this issue it's just going to make me crazy hhh, i wanna use x264 because the other encoders that i have installed, either didn't work or encode with so big size.

FFMPEG x264 encoder Android

24 septembre 2014, par DundeeDave

I've compiled an FFMPEG library for use on Android with libx264 and using the NDK.

I want to encode an MPEG video file however the application is failing when opening the encoder codec, in avcodec_open2.

The FFMPEG logs I receive from avcodec_open2 are below with the function returning -22.

Picture size %ux%u is invalid.
ignoring invalid width/height values
Specified pix_fmt is not supported

On windows this code works fine, it's only on Android that there is a failure. Any ides why this would fail on Android?

if (!(codec = avcodec_find_encoder(AV_CODEC_ID_MPEG1VIDEO)))
    {
        return -1;
    }

    //Allocate context based on codec
    if (!(context = avcodec_alloc_context3(codec)))
    {
        return -2;
    }

    //Setup Context
    // put sample parameters
    context->bit_rate = 4000000;
    // resolution must be a multiple of two
    context->width = 1280;
    context->height = 720;
    // frames per second
    context->time_base = (AVRational){1,25};
    context->inter_quant_bias = 96;
    context->gop_size = 10;
    context->max_b_frames = 1;
    //IDs
    context->pix_fmt = AV_PIX_FMT_YUV420P;
    context->codec_id = AV_CODEC_ID_MPEG1VIDEO;
    context->codec_type = AVMEDIA_TYPE_VIDEO;


    if (AV_CODEC_ID_MPEG1VIDEO == AV_CODEC_ID_H264)
    {
        av_opt_set(context->priv_data, "preset", "slow", 0);
    }

    if ((result = avcodec_open2(context, codec, NULL)) < 0)
    {
        //Failed opening Codec!
    }

ffmpeg libx264 non-existing PPS 0 referenced

18 août 2014, par k961

hello i have installed ffmpeg and libx264 based in the offical tutorial on ffmpeg installation here : https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu

i want to get an stream from mumudvb and pass it to ffmpeg for h264 encoding when i use

ffserver -f /path/to/config -d

i get this output :

[h264 @ 0x1ab32c0] non-existing PPS 0 referenced
[mpegts @ 0x2c7cca0] Could not find codec parameters for stream 0 (Video: h264 ([27][0][0][0] / 0x001B)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[h264 @ 0x1ab32c0] non-existing SPS 0 referenced in buffering period
[h264 @ 0x1ab32c0] non-existing PPS 0 referenced
[h264 @ 0x1ab32c0] decode_slice_header error
[h264 @ 0x1ab32c0] no frame!
[mpegts @ 0x1aadca0] 
decoding for stream 0 failed
[mpegts @ 0x1aadca0] decoding for stream 1 failed
Input #0, mpegts, from 'http://127.0.0.1:9097':
  Duration: N/A, start: 45508.714822, bitrate: N/A
  Program 107 
[mpegts @ 0x1aadca0]     Stream #0:0[0x42e]: Video: h264 ([27][0][0][0] / 0x001B)[mpegts @ 0x30b0ca0] decoding for stream 1 failed
, 50 fpsitech@itech-All-Series:~$ , 50 tbr, 90k tbn, 180k tbc
[mpegts @ 0x1cd5ca0]     Stream #0:1Could not find codec parameters for stream 1 (Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[0x42f](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
http://127.0.0.1:8888/tv7.ffm: Input/output error
Input #0, mpegts, from 'http://127.0.0.1:9093':
  Duration: N/A, start: 25560.704144, bitrate: N/A
  Program 103 
    Stream #0:0[0x406]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 16:11 DAR 20:11], 25 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x407](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp
    Stream #0:2[0x40b](ara): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
Received signal 2: terminating.
[mpegts @ 0x30b0ca0] Could not find codec parameters for stream 0 (Video: h264 ([27][0][0][0] / 0x001B)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
http://127.0.0.1:8888/tv3.ffm: Input/output error
[mpegts @ 0x1aadca0] Could not find codec parameters for stream 1 (Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mpegts, from 'http://127.0.0.1:9094':
Received signal 2: terminating.
Could not find codec parameters for stream 1 (Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp): unspecified sample rate
Consider increasing the value for the 'analyzeduration' and 'probesize' options
  Duration: N/A, start: 43409.427056, bitrate: N/A
  Program 104 
    Stream #0:0[0x410]Input #0, mpegts, from 'http://127.0.0.1:9098':
: Video: h264 ([27][0][0][0] / 0x001B), 50 fps, 50 tbr, 90k tbn, 180k tbc
    Stream #0:1[0x411](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp
    Stream #0:2[0x415](ara): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
http://127.0.0.1:8888/tv4.ffm: Input/output error
Received signal 2: terminating.
  Duration: N/A, start: 26351.744300, bitrate: N/A
  Program 108 
    Stream #0:0[0x438]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg), 720x576 [SAR 12:11 DAR 15:11], 25 fps, 50 tbr, 90k tbn, 50 tbc
    Stream #0:1[0x439](per): Audio: aac_latm ([17][0][0][0] / 0x0011), 0 channels, fltp
    Stream #0:2[0x43d](ara): Subtitle: dvb_teletext ([6][0][0][0] / 0x0006)
http://127.0.0.1:8888/tv8.ffm: Input/output error
Received signal 2: terminating.

ffmpeg will gime me the output. but the prooblem is that the outputs bitrate is around 2000k to 3000k it should be 512k

this is my ffserver config :

Port 8888
BindAddress 0.0.0.0
MaxHTTPConnections 20000
MaxClients 10000
MaxBandwidth 1000000
CustomLog -

File /tmp/ch1.ffm
FileMaxSize 100M
ACL allow 127.0.0.1
launch ffmpeg -i http://127.0.0.1:9094



Feed ch1.ffm
Format mpegts
AudioBitRate 64
AudioChannels 2
AudioSampleRate 44100
#AVOptionAudio flags +global_header
VideoBitRate 512
VideoBufferSize 400
VideoFrameRate 25
VideoBitRateTolerance 100
VideoSize 720x576
VideoGopSize 12
AudioCodec aac
VideoCodec libx264
AVOptionVideo bsf h264_mp4toannexb
#AVOptionVideo threads 0
AVOptionVideo threads_type frame
AVOptionVideo coder 0
AVOptionVideo bf 0
AVOptionVideo flags +loop
AVOptionVideo partitions +parti8x8+parti4x4+partp8x8+partb8x8
AVOptionVideo me_method hex
AVOptionVideo subq 7
AVOptionVideo me_range 16
AVOptionVideo g 250
AVOptionVideo keyint_min 10
AVOptionVideo sc_threshold 40
AVOptionVideo i_qfactor 0.71
AVOptionVideo b_strategy 1
AVOptionVideo qcomp 0.6
AVOptionVideo qmin 10
AVOptionVideo qmax 51
AVOptionVideo qdiff 4
AVOptionVideo refs 3
AVOptionVideo directpred 1
AVOptionVideo trellis 1
AVOptionVideo wpredp 0
#AVOptionVideo flags +global_header

StartSendOnKey

how to use x264 dll in another project

5 août 2014, par Hadi Rasekh
enter code here I want to use x264 in my project. There is some line in the code said:

/* Application developers planning to link against a shared library version of * libx264 from a Microsoft Visual Studio or similar development environment * will need to define X264_API_IMPORTS before including this header. * This clause does not apply to MinGW, similar development environments, or non * Windows platforms. */

But I don't get this line: define X264_API_IMPORTS before including this header

We can create x264 dll by its configuration and make
```
    ./configure --enable-shared
    make
```
but I can not use the dll in my Qt Project.

I can make my own dll (in another code) and use it in the project. But when I start to use x264 dll in my project I get the following error:
```
    C:\DataHiding\SourceCode2\GUI\DataHiding\mainwindow.cpp:10: error:
    'pulldown_frame_duration' was not declared in this scope
    qDebug() << pulldown_frame_duration[1];
             ^
```

1 | ... | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | ... | 88

Newest 'libx264' Questions - Stack Overflow

Les articles publiés sur le site

How to open AVCodec ?

how to use x264 encoder with directshow

FFMPEG x264 encoder Android

ffmpeg libx264 non-existing PPS 0 referenced

how to use x264 dll in another project

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