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The first frame is not the I frame for h. 264, how to decode?

Time:09-29

With JM 264 file decoding, display an error, like the first frame is not because I frame;
Now trying to read file modification file stream pointer, pointing to the first frame, I but don't know how to run it,

CodePudding user response:

Not I frame can't pick up, to continue to receive, I son began to pick up, before delete

CodePudding user response:

Not I frame in only to lose, until the I frame

CodePudding user response:

H264 standards have rules, the first frame must be IDR frames, if not the does not accord with a standard, so, must seek IDR frames,

CodePudding user response:

Each byte for down, according to the standard of H264, each frame start to 00000001 or 000001, finding each frame after the opening, behind the judge the types of NAL IDR frame has a value of 5, you can refer to this article, speak very clear; http://blog.csdn.net/jefry_xdz/article/details/8461343

CodePudding user response:

According to the H264 NAL head know if PPS, the main frame, SPS is not abandoned, if yes to decode. Can refer to the upstairs to provide web site.

CodePudding user response:

Receive the data if it is not the I frame, can't play it, the common solution is to discard the frame data, continue to accept, until received the I frame,

CodePudding user response:

To wait until until I frame to decode

CodePudding user response:

Is not I lost frame cannot be used

CodePudding user response:

After receiving stream judgment frame type first, if it is not the I frame, discarded, until the first frame is the I frame to start receiving,

CodePudding user response:

It is ok to put it away

CodePudding user response:

In h264 decoding order for example: SPS - & gt; PPS - & gt; I - & gt; B/P; Basically every before an I frame with SPS, PPS NALU; So you feel this decoding cannot simply begin with the I frame for, because each slice will depend on a PPS, and each PPS associated a SPS; The I frame decoding at the same time, due to involve the interframe prediction, this single P/B frame must be unable to revert to a full image;
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