>>outStream->codec->time_base = 1/25 and outStream->time_base = 1/12800. The
>>1st one was set by me but I cannot figure out why and who set 12800? I
>>noticed that before line (7) outStream->time_base = 1/9 and right after
>>it it changes to 1/12800, why?
I was testing on Windows and found
Hi Igor, my comments below
2012/11/28 Morduhaev, Igor (ig...@stats.com)
> I had fps issues when transcoding from avi to mp4(x264). Eventually the
> problem was in PTS and DTS values, so lines 12-15 where added before
> av_interleaved_write_frame function:
>
>
>
> 1. AVFormatContext* outContai
Hi Igor,
As I known some formats require specific timebases (like MPEGTS streams)
so, you can not manipulate with them. But you can manipulate with
CodecContext and can set time base that you need. For example, if FPS equal
to 25, you can set coder time base to 1/25 and simple increment PTS by 1
f
On 28 Nov 2012 20:21, "serdel" wrote:
>
> I implemented a simple algorithm which kept track of previous frame and
the
> current one and checked if the sequence is correct. If it wasn't I didn't
> put the frame to the avcodec_decode_video2 function and stayed that way
> until next sequence has star
I implemented a simple algorithm which kept track of previous frame and the
current one and checked if the sequence is correct. If it wasn't I didn't
put the frame to the avcodec_decode_video2 function and stayed that way
until next sequence has started. It brought the desired results until one
unl
Hi All,
I'm new to FFmpeg programming and I'm having a strange issue with H264 file
framerates.
I'm simply trying to capture video from an NTSC camera using a Matrox
capture card. I wrote a simple application to capture 10 seconds of video
to an MP4 file. The program works, sort of. I get an M
I used ffmpeg to get video info. The output is
Duration: 00:05:57.00, start: 0.00, bitrate: 611 kb/s Stream #0:0(und):
Video: h264 (High) (avc1 / 0x31637661), yuv420p, 808x610, 609 kb/s, 25 fps, 25
tbr, 12800 tbn, 50 tbc
The time base is used to somehow(this is also my another question) cal
I had fps issues when transcoding from avi to mp4(x264). Eventually the problem
was in PTS and DTS values, so lines 12-15 where added before
av_interleaved_write_frame function:
1. AVFormatContext* outContainer = NULL;
2. avformat_alloc_output_context2(&outContainer, NULL, "mp4", "c:\\test.m
On Wed, Nov 28, 2012 at 2:27 PM, serdel wrote:
> Hi,
>
> I am using ffmpeg to decode an rtps (live555) streaming. I decode each
> frame separately in a standard sequence. The normal sequence is SPS and
> PPS, then NAL_IDR_SLICE and finaly NAL_SLICE until next SPS&PPS. On normal
> work, avcodec_de
Mark Kenna writes:
> Is there an inbuilt method of converting YV12 into
> YUV420p using the scaler?
The scaler does not support it but it may be sufficient to
set the codec_tag correctly before decoding (difficult to
say without more information about your use case).
There is also a swapuv f
Hi Guys
Is there an inbuilt method of converting YV12 into YUV420p using the
scaler? I understand the U/V components are swapped but if there's
something built in I'd rather use that.
Thanks,
Mark.
___
Libav-user mailing list
Libav-user@ffmpeg.org
http:
Hi,
I am using ffmpeg to decode an rtps (live555) streaming. I decode each
frame separately in a standard sequence. The normal sequence is SPS and
PPS, then NAL_IDR_SLICE and finaly NAL_SLICE until next SPS&PPS. On normal
work, avcodec_decode_video2 returns positive value of bytes used and sets
t
As per the ffmpeg tutorial code, for code like this:/
while(av_read_frame_proc(pFormatCtx, &packet) >= 0)
{
if (packet.stream_index == videoStream)
{
avcodec_decode_video2_proc(pCodecCtx, pFrame, &frameFinished,
&packet);// Decode video frame
if (frameFinished)
{
13 matches
Mail list logo
